java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/list-properties/splice_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:20:27,985 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:20:27,987 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:20:28,002 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:20:28,003 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:20:28,004 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:20:28,005 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:20:28,006 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:20:28,008 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:20:28,008 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:20:28,009 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:20:28,009 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:20:28,010 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:20:28,011 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:20:28,011 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:20:28,014 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:20:28,016 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:20:28,018 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:20:28,019 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:20:28,020 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:20:28,023 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-21 06:20:28,023 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-21 06:20:28,023 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-21 06:20:28,024 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-21 06:20:28,025 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-21 06:20:28,027 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-21 06:20:28,027 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-21 06:20:28,028 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-21 06:20:28,028 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-21 06:20:28,028 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 06:20:28,029 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 06:20:28,029 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-21 06:20:28,039 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:20:28,039 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:20:28,040 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:20:28,040 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:20:28,041 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:20:28,041 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:20:28,041 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:20:28,041 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:20:28,042 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:20:28,042 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:20:28,042 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:20:28,042 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:20:28,043 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:20:28,043 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:20:28,043 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:20:28,043 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:20:28,043 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:20:28,043 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:20:28,044 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:20:28,044 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:20:28,044 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:20:28,044 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:20:28,044 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:20:28,045 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:20:28,045 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:20:28,045 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:20:28,045 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:20:28,045 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:20:28,046 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:20:28,046 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:20:28,046 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:20:28,046 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:20:28,046 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:20:28,046 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:20:28,047 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:20:28,047 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:20:28,047 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:20:28,048 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:20:28,048 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:20:28,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:20:28,093 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:20:28,096 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:20:28,097 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:20:28,098 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:20:28,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice_true-unreach-call_false-valid-memtrack.i [2018-01-21 06:20:28,268 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:20:28,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:20:28,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:20:28,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:20:28,280 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:20:28,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533d743e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28, skipping insertion in model container [2018-01-21 06:20:28,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,301 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:20:28,341 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:20:28,455 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:20:28,473 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:20:28,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28 WrapperNode [2018-01-21 06:20:28,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:20:28,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:20:28,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:20:28,483 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:20:28,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... [2018-01-21 06:20:28,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:20:28,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:20:28,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:20:28,515 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:20:28,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (1/1) ... No working directory specified, using /storage/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 [2018-01-21 06:20:28,561 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:20:28,561 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:20:28,561 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-21 06:20:28,562 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:20:28,562 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:20:28,562 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:20:28,562 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 06:20:28,562 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 06:20:28,562 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:20:28,563 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:20:28,563 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:20:28,563 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:20:28,563 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:20:28,563 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:20:28,563 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-21 06:20:28,564 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:20:28,564 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:20:28,564 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:20:28,824 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:20:28,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:20:28 BoogieIcfgContainer [2018-01-21 06:20:28,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:20:28,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:20:28,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:20:28,827 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:20:28,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:20:28" (1/3) ... [2018-01-21 06:20:28,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59709d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:20:28, skipping insertion in model container [2018-01-21 06:20:28,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:20:28" (2/3) ... [2018-01-21 06:20:28,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59709d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:20:28, skipping insertion in model container [2018-01-21 06:20:28,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:20:28" (3/3) ... [2018-01-21 06:20:28,831 INFO L105 eAbstractionObserver]: Analyzing ICFG splice_true-unreach-call_false-valid-memtrack.i [2018-01-21 06:20:28,840 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:20:28,848 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 06:20:28,895 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:20:28,895 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:20:28,896 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:20:28,896 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:20:28,896 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:20:28,896 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:20:28,896 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:20:28,896 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == exitErr0EnsuresViolation======== [2018-01-21 06:20:28,897 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:20:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 06:20:28,926 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 06:20:28,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 64 states. [2018-01-21 06:20:29,001 INFO L401 ceAbstractionStarter]: For program point exitErr0EnsuresViolation(line 525) no Hoare annotation was computed. [2018-01-21 06:20:29,001 INFO L401 ceAbstractionStarter]: For program point exitFINAL(lines 619 621) no Hoare annotation was computed. [2018-01-21 06:20:29,002 INFO L404 ceAbstractionStarter]: At program point exitENTRY(lines 619 621) the Hoare annotation is: true [2018-01-21 06:20:29,002 INFO L401 ceAbstractionStarter]: For program point L620(line 620) no Hoare annotation was computed. [2018-01-21 06:20:29,002 INFO L401 ceAbstractionStarter]: For program point exitEXIT(lines 619 621) no Hoare annotation was computed. [2018-01-21 06:20:29,002 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 680) no Hoare annotation was computed. [2018-01-21 06:20:29,002 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 680) no Hoare annotation was computed. [2018-01-21 06:20:29,003 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 680) the Hoare annotation is: true [2018-01-21 06:20:29,003 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 680) no Hoare annotation was computed. [2018-01-21 06:20:29,003 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 680) the Hoare annotation is: true [2018-01-21 06:20:29,003 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 680) no Hoare annotation was computed. [2018-01-21 06:20:29,004 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 680) the Hoare annotation is: true [2018-01-21 06:20:29,004 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 680) no Hoare annotation was computed. [2018-01-21 06:20:29,004 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 680) no Hoare annotation was computed. [2018-01-21 06:20:29,004 INFO L401 ceAbstractionStarter]: For program point L659'(line 659) no Hoare annotation was computed. [2018-01-21 06:20:29,004 INFO L401 ceAbstractionStarter]: For program point L629(line 629) no Hoare annotation was computed. [2018-01-21 06:20:29,004 INFO L401 ceAbstractionStarter]: For program point L628(line 628) no Hoare annotation was computed. [2018-01-21 06:20:29,005 INFO L401 ceAbstractionStarter]: For program point L675'(line 675) no Hoare annotation was computed. [2018-01-21 06:20:29,005 INFO L404 ceAbstractionStarter]: At program point L674''(lines 674 677) the Hoare annotation is: true [2018-01-21 06:20:29,005 INFO L401 ceAbstractionStarter]: For program point L663'(line 663) no Hoare annotation was computed. [2018-01-21 06:20:29,005 INFO L401 ceAbstractionStarter]: For program point L629'''(line 629) no Hoare annotation was computed. [2018-01-21 06:20:29,005 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 626 680) no Hoare annotation was computed. [2018-01-21 06:20:29,006 INFO L401 ceAbstractionStarter]: For program point L636'(lines 636 648) no Hoare annotation was computed. [2018-01-21 06:20:29,006 INFO L401 ceAbstractionStarter]: For program point L676'(line 676) no Hoare annotation was computed. [2018-01-21 06:20:29,006 INFO L401 ceAbstractionStarter]: For program point L641(line 641) no Hoare annotation was computed. [2018-01-21 06:20:29,006 INFO L401 ceAbstractionStarter]: For program point L645(line 645) no Hoare annotation was computed. [2018-01-21 06:20:29,006 INFO L401 ceAbstractionStarter]: For program point L644(line 644) no Hoare annotation was computed. [2018-01-21 06:20:29,006 INFO L401 ceAbstractionStarter]: For program point L649(line 649) no Hoare annotation was computed. [2018-01-21 06:20:29,007 INFO L401 ceAbstractionStarter]: For program point L647(line 647) no Hoare annotation was computed. [2018-01-21 06:20:29,007 INFO L401 ceAbstractionStarter]: For program point L646(line 646) no Hoare annotation was computed. [2018-01-21 06:20:29,007 INFO L401 ceAbstractionStarter]: For program point L657'(line 657) no Hoare annotation was computed. [2018-01-21 06:20:29,007 INFO L404 ceAbstractionStarter]: At program point L645'(line 645) the Hoare annotation is: true [2018-01-21 06:20:29,007 INFO L404 ceAbstractionStarter]: At program point L629'(line 629) the Hoare annotation is: true [2018-01-21 06:20:29,008 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 626 680) no Hoare annotation was computed. [2018-01-21 06:20:29,008 INFO L404 ceAbstractionStarter]: At program point L675''(line 675) the Hoare annotation is: true [2018-01-21 06:20:29,008 INFO L401 ceAbstractionStarter]: For program point L638(line 638) no Hoare annotation was computed. [2018-01-21 06:20:29,008 INFO L401 ceAbstractionStarter]: For program point L637(lines 637 643) no Hoare annotation was computed. [2018-01-21 06:20:29,008 INFO L401 ceAbstractionStarter]: For program point L636(lines 636 648) no Hoare annotation was computed. [2018-01-21 06:20:29,009 INFO L401 ceAbstractionStarter]: For program point L637''(lines 637 643) no Hoare annotation was computed. [2018-01-21 06:20:29,009 INFO L401 ceAbstractionStarter]: For program point L663(line 663) no Hoare annotation was computed. [2018-01-21 06:20:29,009 INFO L401 ceAbstractionStarter]: For program point L645'''(line 645) no Hoare annotation was computed. [2018-01-21 06:20:29,009 INFO L401 ceAbstractionStarter]: For program point L670'(line 670) no Hoare annotation was computed. [2018-01-21 06:20:29,009 INFO L401 ceAbstractionStarter]: For program point L669(lines 669 672) no Hoare annotation was computed. [2018-01-21 06:20:29,010 INFO L404 ceAbstractionStarter]: At program point L669''(lines 669 672) the Hoare annotation is: true [2018-01-21 06:20:29,010 INFO L401 ceAbstractionStarter]: For program point L655'(line 655) no Hoare annotation was computed. [2018-01-21 06:20:29,010 INFO L401 ceAbstractionStarter]: For program point L650(line 650) no Hoare annotation was computed. [2018-01-21 06:20:29,010 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 626 680) no Hoare annotation was computed. [2018-01-21 06:20:29,010 INFO L401 ceAbstractionStarter]: For program point L655(lines 655 667) no Hoare annotation was computed. [2018-01-21 06:20:29,010 INFO L401 ceAbstractionStarter]: For program point L671'(line 671) no Hoare annotation was computed. [2018-01-21 06:20:29,011 INFO L401 ceAbstractionStarter]: For program point L659(line 659) no Hoare annotation was computed. [2018-01-21 06:20:29,011 INFO L401 ceAbstractionStarter]: For program point L658(lines 658 666) no Hoare annotation was computed. [2018-01-21 06:20:29,011 INFO L401 ceAbstractionStarter]: For program point L657(line 657) no Hoare annotation was computed. [2018-01-21 06:20:29,011 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 626 680) the Hoare annotation is: true [2018-01-21 06:20:29,011 INFO L404 ceAbstractionStarter]: At program point L636'''(lines 636 648) the Hoare annotation is: true [2018-01-21 06:20:29,012 INFO L401 ceAbstractionStarter]: For program point L674'''(lines 674 677) no Hoare annotation was computed. [2018-01-21 06:20:29,012 INFO L401 ceAbstractionStarter]: For program point L628'(line 628) no Hoare annotation was computed. [2018-01-21 06:20:29,012 INFO L401 ceAbstractionStarter]: For program point L670(line 670) no Hoare annotation was computed. [2018-01-21 06:20:29,012 INFO L401 ceAbstractionStarter]: For program point L674(lines 674 677) no Hoare annotation was computed. [2018-01-21 06:20:29,012 INFO L401 ceAbstractionStarter]: For program point L671(line 671) no Hoare annotation was computed. [2018-01-21 06:20:29,012 INFO L401 ceAbstractionStarter]: For program point L641'(line 641) no Hoare annotation was computed. [2018-01-21 06:20:29,013 INFO L401 ceAbstractionStarter]: For program point L669'''(lines 669 672) no Hoare annotation was computed. [2018-01-21 06:20:29,013 INFO L401 ceAbstractionStarter]: For program point L676(line 676) no Hoare annotation was computed. [2018-01-21 06:20:29,013 INFO L401 ceAbstractionStarter]: For program point L675(line 675) no Hoare annotation was computed. [2018-01-21 06:20:29,013 INFO L404 ceAbstractionStarter]: At program point L658''(lines 658 666) the Hoare annotation is: true [2018-01-21 06:20:29,013 INFO L401 ceAbstractionStarter]: For program point L638'(line 638) no Hoare annotation was computed. [2018-01-21 06:20:29,014 INFO L401 ceAbstractionStarter]: For program point L636''''(lines 636 648) no Hoare annotation was computed. [2018-01-21 06:20:29,014 INFO L401 ceAbstractionStarter]: For program point L655'''(lines 655 667) no Hoare annotation was computed. [2018-01-21 06:20:29,019 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:20:29,019 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:20:29,019 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:20:29,019 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:20:29,020 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:20:29,020 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:20:29,020 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:20:29,020 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:20:29,020 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:20:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 06:20:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:20:29,024 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:29,025 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:20:29,025 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:20:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash 171440, now seen corresponding path program 1 times [2018-01-21 06:20:29,034 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:29,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,058 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:29,058 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,059 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:20:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:20:29,128 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:20:29,134 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:20:29,141 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:20:29,141 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:20:29,141 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:20:29,142 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:20:29,142 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:20:29,142 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:20:29,142 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:20:29,142 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:20:29,142 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:20:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-21 06:20:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 06:20:29,146 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:29,147 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:20:29,147 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:20:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash -999156771, now seen corresponding path program 1 times [2018-01-21 06:20:29,148 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:29,149 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,149 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:29,149 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,149 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:20:29,183 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:20:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 06:20:29,222 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:20:29,223 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:20:29,223 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:20:29,294 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:20:29,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:20:29,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:20:29,306 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-01-21 06:20:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:20:29,325 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2018-01-21 06:20:29,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:20:29,326 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 06:20:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:20:29,335 INFO L225 Difference]: With dead ends: 99 [2018-01-21 06:20:29,335 INFO L226 Difference]: Without dead ends: 56 [2018-01-21 06:20:29,337 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:20:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-21 06:20:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-21 06:20:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-21 06:20:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2018-01-21 06:20:29,366 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 17 [2018-01-21 06:20:29,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:20:29,367 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2018-01-21 06:20:29,367 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:20:29,367 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2018-01-21 06:20:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 06:20:29,367 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:29,368 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:20:29,368 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:20:29,368 INFO L82 PathProgramCache]: Analyzing trace with hash -564250623, now seen corresponding path program 1 times [2018-01-21 06:20:29,368 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:29,369 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,369 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:29,369 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,369 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:20:29,387 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:20:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 06:20:29,444 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:20:29,444 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 06:20:29,444 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:20:29,446 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 06:20:29,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 06:20:29,446 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 06:20:29,446 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 4 states. [2018-01-21 06:20:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:20:29,523 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2018-01-21 06:20:29,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 06:20:29,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-21 06:20:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:20:29,526 INFO L225 Difference]: With dead ends: 97 [2018-01-21 06:20:29,526 INFO L226 Difference]: Without dead ends: 65 [2018-01-21 06:20:29,527 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 06:20:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-21 06:20:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2018-01-21 06:20:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-21 06:20:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2018-01-21 06:20:29,535 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 19 [2018-01-21 06:20:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:20:29,536 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2018-01-21 06:20:29,536 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 06:20:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2018-01-21 06:20:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 06:20:29,537 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:20:29,537 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:20:29,537 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:20:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2078626135, now seen corresponding path program 1 times [2018-01-21 06:20:29,538 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:20:29,539 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,539 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:20:29,539 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:20:29,539 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:20:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:20:29,568 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:20:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 06:20:29,726 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:20:29,726 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:20:29,727 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-01-21 06:20:29,729 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [14], [16], [19], [21], [24], [25], [26], [32], [33], [39], [41], [42], [43], [47], [48], [51], [125], [132], [133], [138], [143], [144], [145], [146] [2018-01-21 06:20:29,783 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:20:29,783 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown