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_mostprecise.epf -i ../../../trunk/examples/svcomp/memsafety-ext2/split_list_test05_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:05:36,955 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:05:36,957 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:05:36,974 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:05:36,974 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:05:36,976 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:05:36,977 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:05:36,979 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:05:36,981 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:05:36,982 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:05:36,983 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 03:05:37,008 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_mostprecise.epf [2018-01-21 03:05:37,018 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:05:37,019 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:05:37,020 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:05:37,020 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:05:37,020 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:05:37,020 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:05:37,020 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:05:37,021 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:05:37,021 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:05:37,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:05:37,022 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:05:37,022 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:05:37,022 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:05:37,022 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:05:37,022 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:05:37,023 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:05:37,023 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:05:37,023 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:05:37,023 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:05:37,023 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:05:37,024 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:05:37,024 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:05:37,024 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:05:37,024 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:05:37,024 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:05:37,025 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:05:37,025 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:05:37,025 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:05:37,025 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:05:37,025 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:05:37,026 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:05:37,026 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:05:37,026 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:05:37,026 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:05:37,026 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:05:37,027 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:05:37,027 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:05:37,027 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:05:37,028 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:05:37,028 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:05:37,064 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:05:37,077 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:05:37,082 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:05:37,084 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:05:37,084 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:05:37,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext2/split_list_test05_false-valid-deref.i [2018-01-21 03:05:37,291 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:05:37,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:05:37,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:05:37,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:05:37,307 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:05:37,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a663d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37, skipping insertion in model container [2018-01-21 03:05:37,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,333 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:05:37,377 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:05:37,535 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:05:37,567 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:05:37,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37 WrapperNode [2018-01-21 03:05:37,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:05:37,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:05:37,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:05:37,583 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:05:37,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (1/1) ... [2018-01-21 03:05:37,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:05:37,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:05:37,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:05:37,637 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:05:37,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (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 03:05:37,690 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:05:37,690 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:05:37,690 INFO L136 BoogieDeclarations]: Found implementation of procedure containsHead [2018-01-21 03:05:37,690 INFO L136 BoogieDeclarations]: Found implementation of procedure containsBody [2018-01-21 03:05:37,690 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-21 03:05:37,691 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:05:37,691 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-01-21 03:05:37,692 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:05:37,692 INFO L128 BoogieDeclarations]: Found specification of procedure containsHead [2018-01-21 03:05:37,692 INFO L128 BoogieDeclarations]: Found specification of procedure containsBody [2018-01-21 03:05:37,692 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-21 03:05:37,692 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:05:37,692 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:05:37,692 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:05:38,568 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:05:38,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:05:38 BoogieIcfgContainer [2018-01-21 03:05:38,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:05:38,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:05:38,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:05:38,577 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:05:38,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:05:37" (1/3) ... [2018-01-21 03:05:38,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a00ae5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:05:38, skipping insertion in model container [2018-01-21 03:05:38,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:05:37" (2/3) ... [2018-01-21 03:05:38,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a00ae5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:05:38, skipping insertion in model container [2018-01-21 03:05:38,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:05:38" (3/3) ... [2018-01-21 03:05:38,583 INFO L105 eAbstractionObserver]: Analyzing ICFG split_list_test05_false-valid-deref.i [2018-01-21 03:05:38,591 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:05:38,599 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-01-21 03:05:38,660 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:05:38,660 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:05:38,661 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:05:38,661 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:05:38,661 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:05:38,661 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:05:38,661 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:05:38,661 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:05:38,662 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:05:38,690 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states. [2018-01-21 03:05:38,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:05:38,696 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:05:38,698 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:05:38,698 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:05:38,703 INFO L82 PathProgramCache]: Analyzing trace with hash 425620, now seen corresponding path program 1 times [2018-01-21 03:05:38,706 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:05:38,768 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:38,768 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:05:38,769 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:38,769 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:05:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:05:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:05:38,869 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:05:38,878 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:05:38,886 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:05:38,886 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:05:38,886 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:05:38,886 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:05:38,886 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:05:38,886 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:05:38,886 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:05:38,886 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == containsHeadErr0EnsuresViolation======== [2018-01-21 03:05:38,886 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:05:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states. [2018-01-21 03:05:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-21 03:05:38,903 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:05:38,903 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:38,903 INFO L371 AbstractCegarLoop]: === Iteration 1 === [containsHeadErr0EnsuresViolation]=== [2018-01-21 03:05:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash 845880362, now seen corresponding path program 1 times [2018-01-21 03:05:38,903 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:05:38,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:38,904 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:05:38,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:38,904 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:05:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:05:39,059 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:05:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-01-21 03:05:39,316 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:05:39,316 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:05:39,317 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:05:39,319 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:05:39,335 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:05:39,336 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:05:39,339 INFO L87 Difference]: Start difference. First operand 197 states. Second operand 2 states. [2018-01-21 03:05:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:05:39,411 INFO L93 Difference]: Finished difference Result 381 states and 477 transitions. [2018-01-21 03:05:39,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:05:39,413 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 198 [2018-01-21 03:05:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:05:39,422 INFO L225 Difference]: With dead ends: 381 [2018-01-21 03:05:39,423 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 03:05:39,432 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 03:05:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 03:05:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 03:05:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 03:05:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 03:05:39,453 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 198 [2018-01-21 03:05:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:05:39,454 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 03:05:39,454 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:05:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 03:05:39,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 03:05:39,459 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:05:39,459 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:05:39,459 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:05:39,459 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:05:39,459 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:05:39,459 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:05:39,460 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:05:39,460 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == containsBodyErr0EnsuresViolation======== [2018-01-21 03:05:39,460 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:05:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states. [2018-01-21 03:05:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-01-21 03:05:39,472 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:05:39,472 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:39,472 INFO L371 AbstractCegarLoop]: === Iteration 1 === [containsBodyErr0EnsuresViolation]=== [2018-01-21 03:05:39,473 INFO L82 PathProgramCache]: Analyzing trace with hash -418021682, now seen corresponding path program 1 times [2018-01-21 03:05:39,473 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:05:39,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:39,474 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:05:39,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:39,475 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:05:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:05:39,505 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:05:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-01-21 03:05:39,636 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:05:39,636 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:05:39,636 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:05:39,637 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:05:39,637 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:05:39,637 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:05:39,638 INFO L87 Difference]: Start difference. First operand 197 states. Second operand 2 states. [2018-01-21 03:05:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:05:39,661 INFO L93 Difference]: Finished difference Result 381 states and 477 transitions. [2018-01-21 03:05:39,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:05:39,661 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 201 [2018-01-21 03:05:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:05:39,662 INFO L225 Difference]: With dead ends: 381 [2018-01-21 03:05:39,662 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 03:05:39,664 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 03:05:39,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 03:05:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 03:05:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 03:05:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 03:05:39,665 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2018-01-21 03:05:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:05:39,665 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 03:05:39,665 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:05:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 03:05:39,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 03:05:39,668 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:05:39,668 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:05:39,668 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:05:39,668 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:05:39,669 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:05:39,669 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:05:39,669 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:05:39,669 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:05:39,669 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:05:39,671 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states. [2018-01-21 03:05:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-01-21 03:05:39,676 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:05:39,677 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:39,677 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:05:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash -500451978, now seen corresponding path program 1 times [2018-01-21 03:05:39,677 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:05:39,678 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:39,678 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:05:39,679 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:39,679 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:05:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:05:39,702 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:05:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-01-21 03:05:39,799 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:05:39,800 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:05:39,800 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:05:39,800 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:05:39,801 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:05:39,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:05:39,801 INFO L87 Difference]: Start difference. First operand 197 states. Second operand 2 states. [2018-01-21 03:05:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:05:39,818 INFO L93 Difference]: Finished difference Result 381 states and 477 transitions. [2018-01-21 03:05:39,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:05:39,818 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 194 [2018-01-21 03:05:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:05:39,826 INFO L225 Difference]: With dead ends: 381 [2018-01-21 03:05:39,826 INFO L226 Difference]: Without dead ends: 191 [2018-01-21 03:05:39,827 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 03:05:39,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-01-21 03:05:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-01-21 03:05:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-01-21 03:05:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 227 transitions. [2018-01-21 03:05:39,861 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 227 transitions. Word has length 194 [2018-01-21 03:05:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:05:39,862 INFO L432 AbstractCegarLoop]: Abstraction has 191 states and 227 transitions. [2018-01-21 03:05:39,862 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:05:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 227 transitions. [2018-01-21 03:05:39,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-01-21 03:05:39,868 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:05:39,869 INFO L322 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:39,869 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:05:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1705669942, now seen corresponding path program 1 times [2018-01-21 03:05:39,869 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:05:39,870 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:39,871 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:05:39,871 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:05:39,871 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:05:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:05:39,905 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:05:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2018-01-21 03:05:40,112 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:05:40,113 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:05:40,114 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 266 with the following transitions: [2018-01-21 03:05:40,117 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [10], [12], [21], [23], [33], [35], [46], [48], [60], [62], [63], [65], [66], [67], [68], [69], [73], [77], [81], [89], [92], [106], [110], [114], [122], [125], [140], [144], [148], [156], [159], [165], [166], [167], [168], [172], [175], [180], [181], [182], [183], [186], [265], [267], [268], [338], [339], [340], [341], [342], [343], [344], [351], [355], [356], [357], [358], [359], [369], [371], [372], [373], [374], [375], [376], [377], [378], [379], [380], [381], [382], [383], [384], [385], [386], [387], [388], [389], [390], [391], [392], [393], [394], [395], [396], [397], [398], [399], [400], [403], [404], [405], [406] [2018-01-21 03:05:40,191 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:05:40,191 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