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_imprecise.epf -i ../../../trunk/examples/svcomp/memsafety-ext2/length_test03_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:41:49,740 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:41:49,742 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:41:49,757 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:41:49,757 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:41:49,758 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:41:49,759 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:41:49,761 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:41:49,763 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:41:49,764 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:41:49,765 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:41:49,765 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:41:49,766 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:41:49,767 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:41:49,768 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:41:49,771 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:41:49,773 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:41:49,775 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:41:49,776 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:41:49,778 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:41:49,780 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:41:49,785 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 00:41:49,786 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 00:41:49,786 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_imprecise.epf [2018-01-21 00:41:49,795 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:41:49,795 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:41:49,796 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:41:49,796 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:41:49,796 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:41:49,796 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:41:49,796 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:41:49,796 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:41:49,797 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:41:49,797 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:41:49,797 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:41:49,797 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:41:49,797 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:41:49,797 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:41:49,797 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:41:49,797 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:41:49,798 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:41:49,798 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:41:49,798 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:41:49,798 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:41:49,798 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:41:49,798 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:41:49,798 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:41:49,799 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:41:49,799 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:41:49,799 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:41:49,799 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:41:49,799 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:41:49,799 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:41:49,800 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:41:49,801 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:41:49,801 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:41:49,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:41:49,844 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:41:49,847 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:41:49,848 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:41:49,849 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:41:49,849 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext2/length_test03_true-valid-memsafety.i [2018-01-21 00:41:50,007 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:41:50,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:41:50,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:41:50,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:41:50,017 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:41:50,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d50c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50, skipping insertion in model container [2018-01-21 00:41:50,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,033 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:41:50,071 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:41:50,190 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:41:50,213 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:41:50,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50 WrapperNode [2018-01-21 00:41:50,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:41:50,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:41:50,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:41:50,223 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:41:50,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (1/1) ... [2018-01-21 00:41:50,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:41:50,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:41:50,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:41:50,258 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:41:50,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (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 00:41:50,309 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:41:50,310 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:41:50,310 INFO L136 BoogieDeclarations]: Found implementation of procedure append [2018-01-21 00:41:50,310 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:41:50,310 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:41:50,310 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:41:50,310 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:41:50,310 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:41:50,310 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:41:50,310 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure append [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:41:50,311 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:41:50,637 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:41:50,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:41:50 BoogieIcfgContainer [2018-01-21 00:41:50,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:41:50,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:41:50,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:41:50,641 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:41:50,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:41:50" (1/3) ... [2018-01-21 00:41:50,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a001553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:41:50, skipping insertion in model container [2018-01-21 00:41:50,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:41:50" (2/3) ... [2018-01-21 00:41:50,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a001553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:41:50, skipping insertion in model container [2018-01-21 00:41:50,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:41:50" (3/3) ... [2018-01-21 00:41:50,645 INFO L105 eAbstractionObserver]: Analyzing ICFG length_test03_true-valid-memsafety.i [2018-01-21 00:41:50,652 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:41:50,657 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 00:41:50,695 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:41:50,696 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:41:50,696 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:41:50,696 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:41:50,696 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:41:50,696 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:41:50,696 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:41:50,696 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:41:50,697 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:41:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2018-01-21 00:41:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:41:50,717 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:50,718 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:41:50,718 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:41:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash 159493, now seen corresponding path program 1 times [2018-01-21 00:41:50,723 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:50,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:50,763 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:50,763 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:50,763 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:41:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:41:50,822 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:41:50,829 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:41:50,834 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:41:50,834 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:41:50,834 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:41:50,835 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:41:50,835 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:41:50,835 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:41:50,835 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:41:50,835 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:41:50,835 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:41:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2018-01-21 00:41:50,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 00:41:50,840 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:50,841 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:50,841 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:41:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1690254578, now seen corresponding path program 1 times [2018-01-21 00:41:50,841 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:50,842 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:50,842 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:50,842 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:50,842 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:50,886 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:51,023 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 00:41:51,025 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:41:51,025 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:41:51,026 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:41:51,028 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:41:51,041 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:41:51,041 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:41:51,043 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 2 states. [2018-01-21 00:41:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:51,068 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2018-01-21 00:41:51,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:41:51,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2018-01-21 00:41:51,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:51,077 INFO L225 Difference]: With dead ends: 141 [2018-01-21 00:41:51,077 INFO L226 Difference]: Without dead ends: 76 [2018-01-21 00:41:51,079 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 00:41:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-21 00:41:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-21 00:41:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 00:41:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2018-01-21 00:41:51,115 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 34 [2018-01-21 00:41:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:51,115 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2018-01-21 00:41:51,115 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:41:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2018-01-21 00:41:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-21 00:41:51,119 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:51,119 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:51,119 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:41:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash -767510167, now seen corresponding path program 1 times [2018-01-21 00:41:51,119 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:51,120 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:51,121 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:51,121 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:51,121 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:51,157 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:51,218 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 00:41:51,218 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:41:51,218 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:41:51,218 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:41:51,220 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:41:51,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:41:51,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:41:51,221 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 3 states. [2018-01-21 00:41:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:51,259 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2018-01-21 00:41:51,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:41:51,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2018-01-21 00:41:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:51,262 INFO L225 Difference]: With dead ends: 139 [2018-01-21 00:41:51,262 INFO L226 Difference]: Without dead ends: 77 [2018-01-21 00:41:51,264 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:41:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-21 00:41:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-01-21 00:41:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-21 00:41:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2018-01-21 00:41:51,273 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 54 [2018-01-21 00:41:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:51,274 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2018-01-21 00:41:51,274 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:41:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2018-01-21 00:41:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 00:41:51,276 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:51,276 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:51,277 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:41:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 667417900, now seen corresponding path program 1 times [2018-01-21 00:41:51,277 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:51,278 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:51,278 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:51,279 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:51,279 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:51,321 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:51,387 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 00:41:51,388 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:41:51,388 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:41:51,388 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:41:51,388 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:41:51,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:41:51,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:41:51,389 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 3 states. [2018-01-21 00:41:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:41:51,425 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2018-01-21 00:41:51,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:41:51,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2018-01-21 00:41:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:41:51,428 INFO L225 Difference]: With dead ends: 117 [2018-01-21 00:41:51,428 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 00:41:51,429 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:41:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 00:41:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2018-01-21 00:41:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-21 00:41:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2018-01-21 00:41:51,439 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 56 [2018-01-21 00:41:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:41:51,439 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2018-01-21 00:41:51,439 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:41:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2018-01-21 00:41:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-21 00:41:51,442 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:41:51,442 INFO L322 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] [2018-01-21 00:41:51,443 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:41:51,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1090926838, now seen corresponding path program 1 times [2018-01-21 00:41:51,443 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:41:51,444 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:51,444 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:41:51,445 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:41:51,445 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:41:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:41:51,481 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:41:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 00:41:51,558 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:41:51,558 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:41:51,559 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 84 with the following transitions: [2018-01-21 00:41:51,561 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [6], [7], [8], [12], [15], [18], [24], [28], [31], [33], [36], [40], [41], [42], [43], [47], [51], [61], [62], [63], [64], [68], [71], [73], [74], [75], [76], [77], [79], [83], [84], [85], [86], [87], [89], [90], [95], [96], [97], [98], [99], [100], [101], [104], [105], [106], [112], [113], [114], [115], [116], [126], [128], [129], [130], [131], [132], [133], [134], [135] [2018-01-21 00:41:51,607 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:41:51,608 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:41:51,860 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-21 00:41:51,861 INFO L268 AbstractInterpreter]: Visited 31 different actions 31 times. Never merged. Never widened. Never found a fixpoint. Largest state had 49 variables. [2018-01-21 00:41:51,874 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-01-21 00:41:52,105 INFO L232 lantSequenceWeakener]: Weakened 30 states. On average, predicates are now at 55.85% of their original sizes. [2018-01-21 00:41:52,105 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-01-21 00:41:52,897 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-01-21 00:41:52,898 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-21 00:41:52,898 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [26] imperfect sequences [4] total 29 [2018-01-21 00:41:52,898 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:41:52,899 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-01-21 00:41:52,899 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-01-21 00:41:52,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2018-01-21 00:41:52,900 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 27 states. [2018-01-21 00:41:54,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-21 00:41:54,855 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCongruenceClosure.(WeqCongruenceClosure.java:157) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCcManager.copyWeqCc(WeqCcManager.java:1327) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCcManager.isStrongerThan(WeqCcManager.java:582) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.EqConstraint.isStrongerThan(EqConstraint.java:283) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.vp.EqState.isSubsetOf(EqState.java:192) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.vp.EqState.isSubsetOf(EqState.java:1) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.getMaximalElements(DisjunctiveAbstractState.java:565) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.crossProduct(DisjunctiveAbstractState.java:407) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.DisjunctiveAbstractState.intersect(DisjunctiveAbstractState.java:291) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner$AbsIntPredicateUnifier.lambda$3(CegarAbsIntRunner.java:684) at java.util.stream.ReduceOps$2ReducingSink.accept(ReduceOps.java:123) at java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1548) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.reduce(ReferencePipeline.java:479) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner$AbsIntPredicateUnifier.getOrConstructPredicateForConjunction(CegarAbsIntRunner.java:684) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:261) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:283) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1054) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:956) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:185) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:552) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:522) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:157) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:117) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-01-21 00:41:54,857 INFO L168 Benchmark]: Toolchain (without parser) took 4849.94 ms. Allocated memory was 299.9 MB in the beginning and 559.9 MB in the end (delta: 260.0 MB). Free memory was 256.8 MB in the beginning and 439.8 MB in the end (delta: -183.0 MB). Peak memory consumption was 77.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:41:54,858 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 299.9 MB. Free memory is still 262.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:41:54,859 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.60 ms. Allocated memory is still 299.9 MB. Free memory was 256.8 MB in the beginning and 244.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:41:54,859 INFO L168 Benchmark]: Boogie Preprocessor took 34.27 ms. Allocated memory is still 299.9 MB. Free memory was 244.9 MB in the beginning and 242.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:41:54,859 INFO L168 Benchmark]: RCFGBuilder took 380.22 ms. Allocated memory is still 299.9 MB. Free memory was 242.9 MB in the beginning and 217.8 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:41:54,860 INFO L168 Benchmark]: TraceAbstraction took 4218.07 ms. Allocated memory was 299.9 MB in the beginning and 559.9 MB in the end (delta: 260.0 MB). Free memory was 217.8 MB in the beginning and 439.8 MB in the end (delta: -222.0 MB). Peak memory consumption was 38.1 MB. Max. memory is 5.3 GB. [2018-01-21 00:41:54,861 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 299.9 MB. Free memory is still 262.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 210.60 ms. Allocated memory is still 299.9 MB. Free memory was 256.8 MB in the beginning and 244.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 34.27 ms. Allocated memory is still 299.9 MB. Free memory was 244.9 MB in the beginning and 242.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 380.22 ms. Allocated memory is still 299.9 MB. Free memory was 242.9 MB in the beginning and 217.8 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 4218.07 ms. Allocated memory was 299.9 MB in the beginning and 559.9 MB in the end (delta: 260.0 MB). Free memory was 217.8 MB in the beginning and 439.8 MB in the end (delta: -222.0 MB). Peak memory consumption was 38.1 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 0 LocStat_MAX_SIZEOF_WEQEDGELABEL : 0 LocStat_NO_SUPPORTING_EQUALITIES : 367 LocStat_NO_SUPPORTING_DISEQUALITIES : 134 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 37 TransStat_MAX_WEQGRAPH_SIZE : 0 TransStat_MAX_SIZEOF_WEQEDGELABEL : 0 TransStat_NO_SUPPORTING_EQUALITIES : 89 TransStat_NO_SUPPORTING_DISEQUALITIES : 16 TransStat_NO_DISJUNCTIONS : 41 TransStat_MAX_NO_DISJUNCTIONS : 3 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.384591 RENAME_VARIABLES(MILLISECONDS) : 0.301762 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.350516 PROJECTAWAY(MILLISECONDS) : 0.020009 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.001057 DISJOIN(MILLISECONDS) : 1.078354 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.331037 ADD_EQUALITY(MILLISECONDS) : 0.023131 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.017096 #CONJOIN_DISJUNCTIVE : 66 #RENAME_VARIABLES : 83 #UNFREEZE : 0 #CONJOIN : 147 #PROJECTAWAY : 81 #ADD_WEAK_EQUALITY : 61 #DISJOIN : 4 #RENAME_VARIABLES_DISJUNCTIVE : 79 #ADD_EQUALITY : 124 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 80 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.modelcheckerutils.absint.vpdomain.WeqCongruenceClosure.(WeqCongruenceClosure.java:157) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/length_test03_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_00-41-54-868.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/length_test03_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-21_00-41-54-868.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/length_test03_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-21_00-41-54-868.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/length_test03_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_00-41-54-868.csv Received shutdown request...