java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:09:17,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:09:17,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:09:17,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:09:17,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:09:17,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:09:17,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:09:17,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:09:17,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:09:17,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:09:17,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:09:17,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:09:17,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:09:17,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:09:17,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:09:17,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:09:17,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:09:17,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:09:17,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:09:17,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:09:17,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:09:17,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:09:17,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:09:17,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:09:17,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:09:17,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:09:17,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:09:17,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:09:17,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:09:17,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:09:17,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:09:17,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:09:17,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:09:17,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:09:17,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:09:17,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:09:17,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:09:17,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:09:17,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:09:17,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:09:17,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:09:17,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:09:17,835 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:09:17,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:09:17,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:09:17,837 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:09:17,837 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:09:17,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:09:17,838 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:09:17,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:09:17,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:09:17,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:09:17,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:09:17,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:09:17,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:09:17,839 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:09:17,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:09:17,840 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:09:17,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:09:17,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:09:17,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:09:17,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:09:17,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:09:17,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:17,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:09:17,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:09:17,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:09:17,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:09:17,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:09:17,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:09:17,843 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 [2019-10-13 21:09:18,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:09:18,217 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:09:18,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:09:18,222 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:09:18,223 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:09:18,223 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product01.cil.c [2019-10-13 21:09:18,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4c8ae42/6dfb1bf542e24f70b7d0fcea59cf1f0d/FLAG23c3aaa6f [2019-10-13 21:09:18,940 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:09:18,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product01.cil.c [2019-10-13 21:09:18,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4c8ae42/6dfb1bf542e24f70b7d0fcea59cf1f0d/FLAG23c3aaa6f [2019-10-13 21:09:19,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc4c8ae42/6dfb1bf542e24f70b7d0fcea59cf1f0d [2019-10-13 21:09:19,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:09:19,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:09:19,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:19,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:09:19,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:09:19,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:19" (1/1) ... [2019-10-13 21:09:19,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e42e2d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:19, skipping insertion in model container [2019-10-13 21:09:19,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:09:19" (1/1) ... [2019-10-13 21:09:19,157 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:09:19,239 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:09:19,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:20,003 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:09:20,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:09:20,246 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:09:20,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20 WrapperNode [2019-10-13 21:09:20,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:09:20,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:09:20,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:09:20,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:09:20,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... [2019-10-13 21:09:20,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... [2019-10-13 21:09:20,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... [2019-10-13 21:09:20,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... [2019-10-13 21:09:20,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... [2019-10-13 21:09:20,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... [2019-10-13 21:09:20,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... [2019-10-13 21:09:20,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:09:20,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:09:20,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:09:20,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:09:20,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:09:20,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:09:20,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:09:20,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2019-10-13 21:09:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2019-10-13 21:09:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2019-10-13 21:09:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2019-10-13 21:09:20,533 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2019-10-13 21:09:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2019-10-13 21:09:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2019-10-13 21:09:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2019-10-13 21:09:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2019-10-13 21:09:20,534 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2019-10-13 21:09:20,535 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2019-10-13 21:09:20,535 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2019-10-13 21:09:20,535 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2019-10-13 21:09:20,535 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2019-10-13 21:09:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2019-10-13 21:09:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2019-10-13 21:09:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2019-10-13 21:09:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2019-10-13 21:09:20,536 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2019-10-13 21:09:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2019-10-13 21:09:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2019-10-13 21:09:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2019-10-13 21:09:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2019-10-13 21:09:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2019-10-13 21:09:20,538 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2019-10-13 21:09:20,538 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2019-10-13 21:09:20,538 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2019-10-13 21:09:20,538 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2019-10-13 21:09:20,538 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2019-10-13 21:09:20,538 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2019-10-13 21:09:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2019-10-13 21:09:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2019-10-13 21:09:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2019-10-13 21:09:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2019-10-13 21:09:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2019-10-13 21:09:20,539 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2019-10-13 21:09:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2019-10-13 21:09:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2019-10-13 21:09:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2019-10-13 21:09:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:09:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2019-10-13 21:09:20,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2019-10-13 21:09:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2019-10-13 21:09:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2019-10-13 21:09:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2019-10-13 21:09:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2019-10-13 21:09:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2019-10-13 21:09:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2019-10-13 21:09:20,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2019-10-13 21:09:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2019-10-13 21:09:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2019-10-13 21:09:20,542 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2019-10-13 21:09:20,543 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2019-10-13 21:09:20,543 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2019-10-13 21:09:20,543 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2019-10-13 21:09:20,543 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2019-10-13 21:09:20,543 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2019-10-13 21:09:20,543 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2019-10-13 21:09:20,544 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2019-10-13 21:09:20,544 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2019-10-13 21:09:20,544 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2019-10-13 21:09:20,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:20,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:20,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:20,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:20,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:09:20,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:09:20,545 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2019-10-13 21:09:20,545 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2019-10-13 21:09:20,546 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2019-10-13 21:09:20,546 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2019-10-13 21:09:20,546 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2019-10-13 21:09:20,546 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2019-10-13 21:09:20,546 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2019-10-13 21:09:20,547 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2019-10-13 21:09:20,547 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2019-10-13 21:09:20,547 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2019-10-13 21:09:20,547 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2019-10-13 21:09:20,547 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2019-10-13 21:09:20,548 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2019-10-13 21:09:20,548 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2019-10-13 21:09:20,548 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2019-10-13 21:09:20,549 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2019-10-13 21:09:20,549 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2019-10-13 21:09:20,550 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2019-10-13 21:09:20,550 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2019-10-13 21:09:20,550 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2019-10-13 21:09:20,550 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2019-10-13 21:09:20,551 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2019-10-13 21:09:20,551 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2019-10-13 21:09:20,551 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2019-10-13 21:09:20,551 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2019-10-13 21:09:20,551 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2019-10-13 21:09:20,552 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2019-10-13 21:09:20,552 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2019-10-13 21:09:20,552 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2019-10-13 21:09:20,552 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2019-10-13 21:09:20,553 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2019-10-13 21:09:20,553 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__3 [2019-10-13 21:09:20,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:09:20,553 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2019-10-13 21:09:20,553 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:09:20,554 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2019-10-13 21:09:20,554 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2019-10-13 21:09:20,554 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2019-10-13 21:09:20,554 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2019-10-13 21:09:20,555 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2019-10-13 21:09:20,555 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2019-10-13 21:09:20,555 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2019-10-13 21:09:20,555 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2019-10-13 21:09:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2019-10-13 21:09:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2019-10-13 21:09:20,556 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2019-10-13 21:09:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2019-10-13 21:09:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2019-10-13 21:09:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2019-10-13 21:09:20,557 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2019-10-13 21:09:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2019-10-13 21:09:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2019-10-13 21:09:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__1 [2019-10-13 21:09:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__4 [2019-10-13 21:09:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure test [2019-10-13 21:09:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2019-10-13 21:09:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2019-10-13 21:09:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2019-10-13 21:09:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2019-10-13 21:09:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:09:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2019-10-13 21:09:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification1_spec__2 [2019-10-13 21:09:20,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2019-10-13 21:09:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 21:09:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 21:09:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2019-10-13 21:09:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 21:09:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 21:09:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:09:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 21:09:20,577 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2019-10-13 21:09:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:09:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2019-10-13 21:09:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2019-10-13 21:09:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:09:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2019-10-13 21:09:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2019-10-13 21:09:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2019-10-13 21:09:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2019-10-13 21:09:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2019-10-13 21:09:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2019-10-13 21:09:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2019-10-13 21:09:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:09:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 21:09:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:09:22,925 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:09:22,926 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-13 21:09:22,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:22 BoogieIcfgContainer [2019-10-13 21:09:22,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:09:22,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:09:22,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:09:22,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:09:22,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:09:19" (1/3) ... [2019-10-13 21:09:22,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8d2cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:22, skipping insertion in model container [2019-10-13 21:09:22,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:09:20" (2/3) ... [2019-10-13 21:09:22,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8d2cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:09:22, skipping insertion in model container [2019-10-13 21:09:22,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:09:22" (3/3) ... [2019-10-13 21:09:22,937 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product01.cil.c [2019-10-13 21:09:22,947 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:09:22,958 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:09:22,969 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:09:23,009 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:09:23,010 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:09:23,010 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:09:23,010 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:09:23,010 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:09:23,010 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:09:23,011 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:09:23,011 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:09:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states. [2019-10-13 21:09:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 21:09:23,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:23,075 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:23,078 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1026623827, now seen corresponding path program 1 times [2019-10-13 21:09:23,093 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:23,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105463383] [2019-10-13 21:09:23,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:23,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:23,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:23,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105463383] [2019-10-13 21:09:23,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764452352] [2019-10-13 21:09:23,770 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 [2019-10-13 21:09:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:24,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 3175 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 21:09:24,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:24,566 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:24,798 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:24,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 4 [2019-10-13 21:09:24,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798598805] [2019-10-13 21:09:24,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:09:24,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:24,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:09:24,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:24,826 INFO L87 Difference]: Start difference. First operand 722 states. Second operand 2 states. [2019-10-13 21:09:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:24,899 INFO L93 Difference]: Finished difference Result 605 states and 974 transitions. [2019-10-13 21:09:24,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:09:24,905 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 138 [2019-10-13 21:09:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:24,945 INFO L225 Difference]: With dead ends: 605 [2019-10-13 21:09:24,945 INFO L226 Difference]: Without dead ends: 568 [2019-10-13 21:09:24,952 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:09:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-13 21:09:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2019-10-13 21:09:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2019-10-13 21:09:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 919 transitions. [2019-10-13 21:09:25,076 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 919 transitions. Word has length 138 [2019-10-13 21:09:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:25,079 INFO L462 AbstractCegarLoop]: Abstraction has 568 states and 919 transitions. [2019-10-13 21:09:25,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:09:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 919 transitions. [2019-10-13 21:09:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 21:09:25,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:25,094 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:25,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:25,304 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1495130976, now seen corresponding path program 1 times [2019-10-13 21:09:25,306 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:25,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77969628] [2019-10-13 21:09:25,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:25,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:25,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:25,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77969628] [2019-10-13 21:09:25,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806268954] [2019-10-13 21:09:25,676 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 [2019-10-13 21:09:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:26,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:26,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:26,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:26,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:26,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:26,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868170716] [2019-10-13 21:09:26,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:26,765 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:26,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:26,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:26,765 INFO L87 Difference]: Start difference. First operand 568 states and 919 transitions. Second operand 4 states. [2019-10-13 21:09:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:26,883 INFO L93 Difference]: Finished difference Result 1108 states and 1811 transitions. [2019-10-13 21:09:26,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:26,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-13 21:09:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:26,893 INFO L225 Difference]: With dead ends: 1108 [2019-10-13 21:09:26,893 INFO L226 Difference]: Without dead ends: 568 [2019-10-13 21:09:26,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-13 21:09:26,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2019-10-13 21:09:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2019-10-13 21:09:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 918 transitions. [2019-10-13 21:09:26,968 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 918 transitions. Word has length 140 [2019-10-13 21:09:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:26,970 INFO L462 AbstractCegarLoop]: Abstraction has 568 states and 918 transitions. [2019-10-13 21:09:26,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 918 transitions. [2019-10-13 21:09:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 21:09:26,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:26,979 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:27,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:27,190 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash 983966334, now seen corresponding path program 1 times [2019-10-13 21:09:27,191 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:27,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206830612] [2019-10-13 21:09:27,191 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:27,191 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:27,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:27,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206830612] [2019-10-13 21:09:27,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089734031] [2019-10-13 21:09:27,397 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 [2019-10-13 21:09:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:28,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 3180 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:28,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:28,178 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:28,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:28,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:28,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301299349] [2019-10-13 21:09:28,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:28,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:28,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:28,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:28,441 INFO L87 Difference]: Start difference. First operand 568 states and 918 transitions. Second operand 4 states. [2019-10-13 21:09:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:28,519 INFO L93 Difference]: Finished difference Result 1108 states and 1809 transitions. [2019-10-13 21:09:28,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:28,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 142 [2019-10-13 21:09:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:28,526 INFO L225 Difference]: With dead ends: 1108 [2019-10-13 21:09:28,526 INFO L226 Difference]: Without dead ends: 568 [2019-10-13 21:09:28,529 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-13 21:09:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2019-10-13 21:09:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2019-10-13 21:09:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 917 transitions. [2019-10-13 21:09:28,612 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 917 transitions. Word has length 142 [2019-10-13 21:09:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:28,613 INFO L462 AbstractCegarLoop]: Abstraction has 568 states and 917 transitions. [2019-10-13 21:09:28,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 917 transitions. [2019-10-13 21:09:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 21:09:28,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:28,618 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:28,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:28,830 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 491565736, now seen corresponding path program 1 times [2019-10-13 21:09:28,831 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:28,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336467931] [2019-10-13 21:09:28,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:28,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:28,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:28,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336467931] [2019-10-13 21:09:28,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594637929] [2019-10-13 21:09:28,953 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 [2019-10-13 21:09:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:29,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 3182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:29,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:29,578 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:29,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:29,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:29,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473372046] [2019-10-13 21:09:29,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:29,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:29,910 INFO L87 Difference]: Start difference. First operand 568 states and 917 transitions. Second operand 4 states. [2019-10-13 21:09:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:29,990 INFO L93 Difference]: Finished difference Result 1115 states and 1816 transitions. [2019-10-13 21:09:29,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:29,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-13 21:09:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:29,996 INFO L225 Difference]: With dead ends: 1115 [2019-10-13 21:09:29,997 INFO L226 Difference]: Without dead ends: 577 [2019-10-13 21:09:29,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-10-13 21:09:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2019-10-13 21:09:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2019-10-13 21:09:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 929 transitions. [2019-10-13 21:09:30,025 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 929 transitions. Word has length 144 [2019-10-13 21:09:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:30,025 INFO L462 AbstractCegarLoop]: Abstraction has 577 states and 929 transitions. [2019-10-13 21:09:30,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 929 transitions. [2019-10-13 21:09:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-13 21:09:30,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:30,030 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:30,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:30,238 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:30,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1278076607, now seen corresponding path program 1 times [2019-10-13 21:09:30,239 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:30,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518559634] [2019-10-13 21:09:30,239 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:30,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:30,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:30,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518559634] [2019-10-13 21:09:30,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743105555] [2019-10-13 21:09:30,369 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 [2019-10-13 21:09:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:31,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:31,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:31,206 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:31,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:31,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:31,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098998301] [2019-10-13 21:09:31,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:31,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:31,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:31,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:31,600 INFO L87 Difference]: Start difference. First operand 577 states and 929 transitions. Second operand 4 states. [2019-10-13 21:09:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:31,689 INFO L93 Difference]: Finished difference Result 1117 states and 1817 transitions. [2019-10-13 21:09:31,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:31,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-10-13 21:09:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:31,697 INFO L225 Difference]: With dead ends: 1117 [2019-10-13 21:09:31,697 INFO L226 Difference]: Without dead ends: 577 [2019-10-13 21:09:31,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-10-13 21:09:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2019-10-13 21:09:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2019-10-13 21:09:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 928 transitions. [2019-10-13 21:09:31,731 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 928 transitions. Word has length 145 [2019-10-13 21:09:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:31,732 INFO L462 AbstractCegarLoop]: Abstraction has 577 states and 928 transitions. [2019-10-13 21:09:31,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 928 transitions. [2019-10-13 21:09:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 21:09:31,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:31,737 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:31,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:31,946 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash 697827020, now seen corresponding path program 1 times [2019-10-13 21:09:31,947 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:31,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910842084] [2019-10-13 21:09:31,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,947 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:31,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:32,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910842084] [2019-10-13 21:09:32,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598499841] [2019-10-13 21:09:32,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:32,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:32,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:32,663 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:33,044 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:33,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:33,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758307326] [2019-10-13 21:09:33,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:33,049 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:33,051 INFO L87 Difference]: Start difference. First operand 577 states and 928 transitions. Second operand 4 states. [2019-10-13 21:09:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:33,151 INFO L93 Difference]: Finished difference Result 1117 states and 1816 transitions. [2019-10-13 21:09:33,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:33,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-10-13 21:09:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:33,159 INFO L225 Difference]: With dead ends: 1117 [2019-10-13 21:09:33,160 INFO L226 Difference]: Without dead ends: 577 [2019-10-13 21:09:33,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-10-13 21:09:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2019-10-13 21:09:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2019-10-13 21:09:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 927 transitions. [2019-10-13 21:09:33,202 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 927 transitions. Word has length 146 [2019-10-13 21:09:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:33,205 INFO L462 AbstractCegarLoop]: Abstraction has 577 states and 927 transitions. [2019-10-13 21:09:33,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 927 transitions. [2019-10-13 21:09:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:09:33,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:33,210 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:33,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:33,418 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:33,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1473428571, now seen corresponding path program 1 times [2019-10-13 21:09:33,419 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:33,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566020082] [2019-10-13 21:09:33,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:33,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:33,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:33,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566020082] [2019-10-13 21:09:33,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585262004] [2019-10-13 21:09:33,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:34,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:34,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:34,375 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:34,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:34,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 16 [2019-10-13 21:09:34,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199578469] [2019-10-13 21:09:34,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:09:34,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:09:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:34,788 INFO L87 Difference]: Start difference. First operand 577 states and 927 transitions. Second operand 7 states. [2019-10-13 21:09:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:34,930 INFO L93 Difference]: Finished difference Result 1124 states and 1825 transitions. [2019-10-13 21:09:34,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:09:34,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 147 [2019-10-13 21:09:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:34,935 INFO L225 Difference]: With dead ends: 1124 [2019-10-13 21:09:34,936 INFO L226 Difference]: Without dead ends: 588 [2019-10-13 21:09:34,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 286 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:09:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2019-10-13 21:09:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 584. [2019-10-13 21:09:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 21:09:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 937 transitions. [2019-10-13 21:09:34,962 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 937 transitions. Word has length 147 [2019-10-13 21:09:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:34,963 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 937 transitions. [2019-10-13 21:09:34,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:09:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 937 transitions. [2019-10-13 21:09:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 21:09:34,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:34,967 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:35,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:35,181 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:35,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1997857254, now seen corresponding path program 1 times [2019-10-13 21:09:35,183 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:35,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561391905] [2019-10-13 21:09:35,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:35,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:35,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:35,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561391905] [2019-10-13 21:09:35,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200873267] [2019-10-13 21:09:35,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:35,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 3184 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:35,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:36,002 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:36,210 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:36,210 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:36,210 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191109863] [2019-10-13 21:09:36,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:36,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:36,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:36,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:36,211 INFO L87 Difference]: Start difference. First operand 584 states and 937 transitions. Second operand 4 states. [2019-10-13 21:09:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:36,399 INFO L93 Difference]: Finished difference Result 1129 states and 1836 transitions. [2019-10-13 21:09:36,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:36,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-13 21:09:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:36,405 INFO L225 Difference]: With dead ends: 1129 [2019-10-13 21:09:36,405 INFO L226 Difference]: Without dead ends: 584 [2019-10-13 21:09:36,408 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-13 21:09:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-13 21:09:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 21:09:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 932 transitions. [2019-10-13 21:09:36,431 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 932 transitions. Word has length 147 [2019-10-13 21:09:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:36,432 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 932 transitions. [2019-10-13 21:09:36,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 932 transitions. [2019-10-13 21:09:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 21:09:36,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:36,436 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:36,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:36,653 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 358619992, now seen corresponding path program 1 times [2019-10-13 21:09:36,653 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:36,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470061223] [2019-10-13 21:09:36,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:36,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:36,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 21:09:36,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470061223] [2019-10-13 21:09:36,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796736013] [2019-10-13 21:09:36,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:37,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:37,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:37,522 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:37,752 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:37,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:37,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769499579] [2019-10-13 21:09:37,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:37,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:37,754 INFO L87 Difference]: Start difference. First operand 584 states and 932 transitions. Second operand 4 states. [2019-10-13 21:09:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:37,915 INFO L93 Difference]: Finished difference Result 1129 states and 1826 transitions. [2019-10-13 21:09:37,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:09:37,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-13 21:09:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:37,921 INFO L225 Difference]: With dead ends: 1129 [2019-10-13 21:09:37,921 INFO L226 Difference]: Without dead ends: 584 [2019-10-13 21:09:37,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-13 21:09:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-13 21:09:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 21:09:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 927 transitions. [2019-10-13 21:09:37,945 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 927 transitions. Word has length 149 [2019-10-13 21:09:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:37,945 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 927 transitions. [2019-10-13 21:09:37,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 927 transitions. [2019-10-13 21:09:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:09:37,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:37,950 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:38,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:38,158 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:38,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2079231576, now seen corresponding path program 1 times [2019-10-13 21:09:38,159 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:38,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520576980] [2019-10-13 21:09:38,160 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:38,160 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:38,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:38,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520576980] [2019-10-13 21:09:38,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257356531] [2019-10-13 21:09:38,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:39,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 21:09:39,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:39,066 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:39,404 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:39,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 13 [2019-10-13 21:09:39,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102805548] [2019-10-13 21:09:39,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:09:39,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:09:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:39,408 INFO L87 Difference]: Start difference. First operand 584 states and 927 transitions. Second operand 11 states. [2019-10-13 21:09:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:39,559 INFO L93 Difference]: Finished difference Result 1060 states and 1705 transitions. [2019-10-13 21:09:39,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 21:09:39,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 152 [2019-10-13 21:09:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:39,565 INFO L225 Difference]: With dead ends: 1060 [2019-10-13 21:09:39,565 INFO L226 Difference]: Without dead ends: 596 [2019-10-13 21:09:39,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 295 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:09:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-10-13 21:09:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 588. [2019-10-13 21:09:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2019-10-13 21:09:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 932 transitions. [2019-10-13 21:09:39,589 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 932 transitions. Word has length 152 [2019-10-13 21:09:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:39,590 INFO L462 AbstractCegarLoop]: Abstraction has 588 states and 932 transitions. [2019-10-13 21:09:39,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:09:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 932 transitions. [2019-10-13 21:09:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 21:09:39,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:39,595 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:39,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:39,808 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash 736522260, now seen corresponding path program 2 times [2019-10-13 21:09:39,810 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:39,810 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144083010] [2019-10-13 21:09:39,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:39,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:39,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:39,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144083010] [2019-10-13 21:09:39,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318688309] [2019-10-13 21:09:39,907 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:40,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-10-13 21:09:40,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:09:40,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:40,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:09:40,623 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:41,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:09:41,236 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:41,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 16 [2019-10-13 21:09:41,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197309637] [2019-10-13 21:09:41,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 21:09:41,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:41,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 21:09:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:41,238 INFO L87 Difference]: Start difference. First operand 588 states and 932 transitions. Second operand 14 states. [2019-10-13 21:09:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:41,658 INFO L93 Difference]: Finished difference Result 1064 states and 1712 transitions. [2019-10-13 21:09:41,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:09:41,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 152 [2019-10-13 21:09:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:41,666 INFO L225 Difference]: With dead ends: 1064 [2019-10-13 21:09:41,666 INFO L226 Difference]: Without dead ends: 600 [2019-10-13 21:09:41,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-10-13 21:09:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2019-10-13 21:09:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-13 21:09:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 939 transitions. [2019-10-13 21:09:41,698 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 939 transitions. Word has length 152 [2019-10-13 21:09:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:41,699 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 939 transitions. [2019-10-13 21:09:41,699 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 21:09:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 939 transitions. [2019-10-13 21:09:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:09:41,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:41,707 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:41,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:41,927 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1019317961, now seen corresponding path program 1 times [2019-10-13 21:09:41,928 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:41,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70777591] [2019-10-13 21:09:41,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:41,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:41,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:42,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70777591] [2019-10-13 21:09:42,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030786919] [2019-10-13 21:09:42,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:43,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 3183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:43,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:09:43,338 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:43,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:09:44,015 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:09:44,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [4] total 13 [2019-10-13 21:09:44,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214017485] [2019-10-13 21:09:44,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 21:09:44,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:44,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 21:09:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:09:44,017 INFO L87 Difference]: Start difference. First operand 592 states and 939 transitions. Second operand 11 states. [2019-10-13 21:09:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:44,264 INFO L93 Difference]: Finished difference Result 1067 states and 1721 transitions. [2019-10-13 21:09:44,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:44,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-13 21:09:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:44,270 INFO L225 Difference]: With dead ends: 1067 [2019-10-13 21:09:44,270 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:09:44,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 21:09:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:09:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2019-10-13 21:09:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2019-10-13 21:09:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 956 transitions. [2019-10-13 21:09:44,311 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 956 transitions. Word has length 154 [2019-10-13 21:09:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:44,311 INFO L462 AbstractCegarLoop]: Abstraction has 601 states and 956 transitions. [2019-10-13 21:09:44,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 21:09:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 956 transitions. [2019-10-13 21:09:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:09:44,316 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:44,316 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:44,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:44,526 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1481533394, now seen corresponding path program 1 times [2019-10-13 21:09:44,527 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:44,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682315082] [2019-10-13 21:09:44,527 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:44,527 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:44,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:09:44,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682315082] [2019-10-13 21:09:44,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195206974] [2019-10-13 21:09:44,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:45,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 3185 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:09:45,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:45,625 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:46,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:09:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:09:46,179 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:46,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 16 [2019-10-13 21:09:46,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052144114] [2019-10-13 21:09:46,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 21:09:46,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 21:09:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-10-13 21:09:46,181 INFO L87 Difference]: Start difference. First operand 601 states and 956 transitions. Second operand 9 states. [2019-10-13 21:09:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:46,404 INFO L93 Difference]: Finished difference Result 1159 states and 1860 transitions. [2019-10-13 21:09:46,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 21:09:46,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 155 [2019-10-13 21:09:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:46,409 INFO L225 Difference]: With dead ends: 1159 [2019-10-13 21:09:46,409 INFO L226 Difference]: Without dead ends: 603 [2019-10-13 21:09:46,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:09:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2019-10-13 21:09:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 599. [2019-10-13 21:09:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2019-10-13 21:09:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 952 transitions. [2019-10-13 21:09:46,445 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 952 transitions. Word has length 155 [2019-10-13 21:09:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:46,446 INFO L462 AbstractCegarLoop]: Abstraction has 599 states and 952 transitions. [2019-10-13 21:09:46,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 21:09:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 952 transitions. [2019-10-13 21:09:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 21:09:46,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:46,451 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:46,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:46,661 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash -361741041, now seen corresponding path program 1 times [2019-10-13 21:09:46,661 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:46,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701730944] [2019-10-13 21:09:46,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,662 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:46,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:46,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701730944] [2019-10-13 21:09:46,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078911591] [2019-10-13 21:09:46,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:47,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:47,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:47,640 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:47,881 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:47,881 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:47,881 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214241897] [2019-10-13 21:09:47,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:47,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:47,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:47,883 INFO L87 Difference]: Start difference. First operand 599 states and 952 transitions. Second operand 4 states. [2019-10-13 21:09:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:48,065 INFO L93 Difference]: Finished difference Result 1198 states and 1933 transitions. [2019-10-13 21:09:48,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:48,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-13 21:09:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:48,071 INFO L225 Difference]: With dead ends: 1198 [2019-10-13 21:09:48,071 INFO L226 Difference]: Without dead ends: 644 [2019-10-13 21:09:48,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-10-13 21:09:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 641. [2019-10-13 21:09:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-10-13 21:09:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1021 transitions. [2019-10-13 21:09:48,107 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1021 transitions. Word has length 154 [2019-10-13 21:09:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:48,108 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 1021 transitions. [2019-10-13 21:09:48,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1021 transitions. [2019-10-13 21:09:48,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:09:48,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:48,112 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:48,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:48,322 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1095874226, now seen corresponding path program 1 times [2019-10-13 21:09:48,323 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:48,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764529800] [2019-10-13 21:09:48,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:48,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:48,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764529800] [2019-10-13 21:09:48,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455186313] [2019-10-13 21:09:48,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:49,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 3188 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:49,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:49,211 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:49,458 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:49,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 21:09:49,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374071951] [2019-10-13 21:09:49,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:49,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:49,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:49,459 INFO L87 Difference]: Start difference. First operand 641 states and 1021 transitions. Second operand 4 states. [2019-10-13 21:09:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:49,661 INFO L93 Difference]: Finished difference Result 1201 states and 1934 transitions. [2019-10-13 21:09:49,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:49,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-13 21:09:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:49,667 INFO L225 Difference]: With dead ends: 1201 [2019-10-13 21:09:49,667 INFO L226 Difference]: Without dead ends: 641 [2019-10-13 21:09:49,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:09:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2019-10-13 21:09:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2019-10-13 21:09:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-10-13 21:09:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1016 transitions. [2019-10-13 21:09:49,711 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1016 transitions. Word has length 155 [2019-10-13 21:09:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:49,712 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 1016 transitions. [2019-10-13 21:09:49,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1016 transitions. [2019-10-13 21:09:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 21:09:49,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:49,718 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:49,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:49,928 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash 735813108, now seen corresponding path program 1 times [2019-10-13 21:09:49,929 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:49,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022487430] [2019-10-13 21:09:49,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,930 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:49,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 21:09:50,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022487430] [2019-10-13 21:09:50,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153580211] [2019-10-13 21:09:50,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:50,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 3189 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:09:50,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:09:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:09:50,919 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:09:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 21:09:51,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:09:51,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2019-10-13 21:09:51,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958990039] [2019-10-13 21:09:51,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:09:51,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:09:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:09:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:09:51,114 INFO L87 Difference]: Start difference. First operand 641 states and 1016 transitions. Second operand 4 states. [2019-10-13 21:09:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:09:51,310 INFO L93 Difference]: Finished difference Result 1201 states and 1929 transitions. [2019-10-13 21:09:51,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:09:51,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2019-10-13 21:09:51,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:09:51,319 INFO L225 Difference]: With dead ends: 1201 [2019-10-13 21:09:51,319 INFO L226 Difference]: Without dead ends: 641 [2019-10-13 21:09:51,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:09:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2019-10-13 21:09:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2019-10-13 21:09:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-10-13 21:09:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1011 transitions. [2019-10-13 21:09:51,369 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1011 transitions. Word has length 156 [2019-10-13 21:09:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:09:51,369 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 1011 transitions. [2019-10-13 21:09:51,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:09:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1011 transitions. [2019-10-13 21:09:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 21:09:51,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:09:51,373 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:09:51,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:09:51,583 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:09:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:09:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash 840447251, now seen corresponding path program 1 times [2019-10-13 21:09:51,583 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:09:51,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988504322] [2019-10-13 21:09:51,584 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,584 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:09:51,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:09:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:09:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-13 21:09:51,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988504322] [2019-10-13 21:09:51,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674892199] [2019-10-13 21:09:51,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true