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_smtcomp.epf -i ../../../trunk/examples/svcomp/memsafety-ext/tree_parent_ptr_true-valid-memsafety_false-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 10:19:53,494 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 10:19:53,496 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 10:19:53,512 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 10:19:53,512 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 10:19:53,513 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 10:19:53,514 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 10:19:53,515 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 10:19:53,517 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 10:19:53,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 10:19:53,518 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 10:19:53,518 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 10:19:53,519 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 10:19:53,520 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 10:19:53,520 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 10:19:53,523 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 10:19:53,525 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 10:19:53,527 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 10:19:53,529 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 10:19:53,530 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 10:19:53,532 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 10:19:53,538 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_smtcomp.epf [2018-01-21 10:19:53,555 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 10:19:53,555 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 10:19:53,556 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 10:19:53,556 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 10:19:53,557 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 10:19:53,557 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 10:19:53,557 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 10:19:53,557 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 10:19:53,558 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 10:19:53,558 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 10:19:53,558 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 10:19:53,558 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 10:19:53,559 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 10:19:53,559 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 10:19:53,559 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 10:19:53,559 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 10:19:53,559 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 10:19:53,560 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 10:19:53,560 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 10:19:53,560 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 10:19:53,560 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 10:19:53,560 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 10:19:53,561 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 10:19:53,561 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 10:19:53,561 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 10:19:53,561 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 10:19:53,561 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 10:19:53,562 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 10:19:53,562 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 10:19:53,562 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 10:19:53,562 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 10:19:53,562 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 10:19:53,563 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 10:19:53,563 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 10:19:53,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 10:19:53,563 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 10:19:53,563 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 10:19:53,564 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 10:19:53,564 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 10:19:53,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 10:19:53,647 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 10:19:53,650 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 10:19:53,652 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 10:19:53,652 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 10:19:53,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_parent_ptr_true-valid-memsafety_false-termination.i [2018-01-21 10:19:53,817 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 10:19:53,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 10:19:53,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 10:19:53,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 10:19:53,826 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 10:19:53,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:19:53" (1/1) ... [2018-01-21 10:19:53,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c7e9dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:53, skipping insertion in model container [2018-01-21 10:19:53,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:19:53" (1/1) ... [2018-01-21 10:19:53,842 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:19:53,880 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:19:54,003 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:19:54,024 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:19:54,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54 WrapperNode [2018-01-21 10:19:54,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 10:19:54,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 10:19:54,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 10:19:54,036 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 10:19:54,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (1/1) ... [2018-01-21 10:19:54,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (1/1) ... [2018-01-21 10:19:54,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (1/1) ... [2018-01-21 10:19:54,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (1/1) ... [2018-01-21 10:19:54,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (1/1) ... [2018-01-21 10:19:54,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (1/1) ... [2018-01-21 10:19:54,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (1/1) ... [2018-01-21 10:19:54,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 10:19:54,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 10:19:54,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 10:19:54,077 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 10:19:54,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (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 10:19:54,142 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 10:19:54,142 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 10:19:54,142 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 10:19:54,142 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 10:19:54,142 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 10:19:54,142 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 10:19:54,142 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 10:19:54,142 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 10:19:54,142 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 10:19:54,143 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 10:19:54,143 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 10:19:54,143 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 10:19:54,143 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 10:19:54,143 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 10:19:54,543 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 10:19:54,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:19:54 BoogieIcfgContainer [2018-01-21 10:19:54,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 10:19:54,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 10:19:54,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 10:19:54,546 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 10:19:54,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 10:19:53" (1/3) ... [2018-01-21 10:19:54,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab63095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:19:54, skipping insertion in model container [2018-01-21 10:19:54,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:19:54" (2/3) ... [2018-01-21 10:19:54,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab63095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:19:54, skipping insertion in model container [2018-01-21 10:19:54,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:19:54" (3/3) ... [2018-01-21 10:19:54,549 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_parent_ptr_true-valid-memsafety_false-termination.i [2018-01-21 10:19:54,556 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 10:19:54,562 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 10:19:54,633 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:19:54,633 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:19:54,633 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:19:54,634 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:19:54,634 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:19:54,634 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:19:54,634 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:19:54,634 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 10:19:54,635 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:19:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-21 10:19:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 10:19:54,659 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:19:54,660 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 10:19:54,660 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 10:19:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash 185475, now seen corresponding path program 1 times [2018-01-21 10:19:54,665 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:19:54,710 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:54,711 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:19:54,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:54,711 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:19:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:19:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:19:54,767 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:19:54,775 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:19:54,782 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:19:54,782 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:19:54,782 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:19:54,782 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:19:54,782 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:19:54,783 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:19:54,783 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:19:54,783 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 10:19:54,783 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:19:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-21 10:19:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 10:19:54,787 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:19:54,787 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] [2018-01-21 10:19:54,787 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:19:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1602735979, now seen corresponding path program 1 times [2018-01-21 10:19:54,787 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:19:54,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:54,788 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:19:54,789 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:54,789 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:19:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:19:54,820 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:19:54,862 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 10:19:54,864 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:19:54,864 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:19:54,865 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:19:54,868 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:19:54,960 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:19:54,961 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:19:54,964 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 2 states. [2018-01-21 10:19:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:19:54,992 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2018-01-21 10:19:54,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:19:54,993 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 10:19:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:19:55,005 INFO L225 Difference]: With dead ends: 173 [2018-01-21 10:19:55,006 INFO L226 Difference]: Without dead ends: 89 [2018-01-21 10:19:55,009 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 10:19:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-01-21 10:19:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-01-21 10:19:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 10:19:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-01-21 10:19:55,045 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 21 [2018-01-21 10:19:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:19:55,046 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-01-21 10:19:55,046 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:19:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-01-21 10:19:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 10:19:55,047 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:19:55,047 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] [2018-01-21 10:19:55,047 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:19:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash 553744969, now seen corresponding path program 1 times [2018-01-21 10:19:55,047 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:19:55,048 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,048 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:19:55,048 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,048 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:19:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:19:55,070 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:19:55,140 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 10:19:55,140 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:19:55,140 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 10:19:55,140 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:19:55,142 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 10:19:55,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 10:19:55,143 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 10:19:55,143 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 4 states. [2018-01-21 10:19:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:19:55,208 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2018-01-21 10:19:55,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 10:19:55,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-21 10:19:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:19:55,210 INFO L225 Difference]: With dead ends: 98 [2018-01-21 10:19:55,210 INFO L226 Difference]: Without dead ends: 93 [2018-01-21 10:19:55,211 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:19:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-21 10:19:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-01-21 10:19:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-21 10:19:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2018-01-21 10:19:55,219 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 24 [2018-01-21 10:19:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:19:55,220 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2018-01-21 10:19:55,220 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 10:19:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2018-01-21 10:19:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 10:19:55,221 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:19:55,221 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-21 10:19:55,221 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:19:55,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1841085354, now seen corresponding path program 1 times [2018-01-21 10:19:55,222 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:19:55,222 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,222 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:19:55,222 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,223 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:19:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:19:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:19:55,299 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:19:55,308 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:19:55,315 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:19:55,316 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:19:55,329 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:19:55,329 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:19:55,329 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:19:55,329 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:19:55,329 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:19:55,329 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:19:55,330 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:19:55,330 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 10:19:55,330 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:19:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-21 10:19:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 10:19:55,332 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:19:55,332 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 10:19:55,332 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 10:19:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2000564629, now seen corresponding path program 1 times [2018-01-21 10:19:55,333 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:19:55,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,333 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:19:55,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,334 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:19:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:19:55,344 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:19:55,358 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 10:19:55,358 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:19:55,358 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:19:55,358 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:19:55,359 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:19:55,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:19:55,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:19:55,359 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 2 states. [2018-01-21 10:19:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:19:55,367 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2018-01-21 10:19:55,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:19:55,367 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 10:19:55,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:19:55,369 INFO L225 Difference]: With dead ends: 173 [2018-01-21 10:19:55,369 INFO L226 Difference]: Without dead ends: 87 [2018-01-21 10:19:55,370 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 10:19:55,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-01-21 10:19:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-01-21 10:19:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-21 10:19:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-01-21 10:19:55,376 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 19 [2018-01-21 10:19:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:19:55,377 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-01-21 10:19:55,377 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:19:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-01-21 10:19:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 10:19:55,377 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:19:55,378 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] [2018-01-21 10:19:55,378 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 10:19:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1791600567, now seen corresponding path program 1 times [2018-01-21 10:19:55,378 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:19:55,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,379 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:19:55,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,379 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:19:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:19:55,392 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:19:55,437 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 10:19:55,437 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:19:55,437 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 10:19:55,437 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:19:55,438 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 10:19:55,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 10:19:55,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 10:19:55,438 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 4 states. [2018-01-21 10:19:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:19:55,470 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2018-01-21 10:19:55,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 10:19:55,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-01-21 10:19:55,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:19:55,472 INFO L225 Difference]: With dead ends: 94 [2018-01-21 10:19:55,472 INFO L226 Difference]: Without dead ends: 91 [2018-01-21 10:19:55,472 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:19:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-21 10:19:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2018-01-21 10:19:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 10:19:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-01-21 10:19:55,480 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 22 [2018-01-21 10:19:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:19:55,481 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-01-21 10:19:55,481 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 10:19:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-01-21 10:19:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 10:19:55,482 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:19:55,483 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-21 10:19:55,483 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 10:19:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2138226282, now seen corresponding path program 1 times [2018-01-21 10:19:55,483 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:19:55,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,484 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:19:55,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:19:55,485 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:19:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:19:55,506 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:19:56,012 WARN L146 SmtUtils]: Spent 123ms on a formula simplification. DAG size of input: 26 DAG size of output 18 [2018-01-21 10:19:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:19:56,353 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:19:56,354 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:19:56,354 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-01-21 10:19:56,375 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [11], [15], [17], [20], [109], [110], [111], [112], [113], [117], [121], [123], [124], [125], [126], [127], [128], [129], [140], [142], [153], [155], [159], [161], [162], [163], [164] [2018-01-21 10:19:56,461 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:19:56,461 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-21 10:21:04,677 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-21 10:21:04,677 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-21 10:21:04,700 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 10:21:04,700 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:21:04,700 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 10:21:04,721 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:21:04,722 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 10:21:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:21:04,767 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 10:21:04,773 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 10:21:04,774 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 10:21:04,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 10:21:04 BoogieIcfgContainer [2018-01-21 10:21:04,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 10:21:04,777 INFO L168 Benchmark]: Toolchain (without parser) took 70959.33 ms. Allocated memory was 305.1 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 262.5 MB in the beginning and 1.2 GB in the end (delta: -926.6 MB). Peak memory consumption was 1.1 GB. Max. memory is 5.3 GB. [2018-01-21 10:21:04,778 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 305.1 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 10:21:04,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.15 ms. Allocated memory is still 305.1 MB. Free memory was 262.5 MB in the beginning and 250.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. [2018-01-21 10:21:04,779 INFO L168 Benchmark]: Boogie Preprocessor took 40.88 ms. Allocated memory is still 305.1 MB. Free memory was 250.5 MB in the beginning and 248.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 10:21:04,779 INFO L168 Benchmark]: RCFGBuilder took 467.14 ms. Allocated memory is still 305.1 MB. Free memory was 248.5 MB in the beginning and 222.0 MB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 5.3 GB. [2018-01-21 10:21:04,779 INFO L168 Benchmark]: TraceAbstraction took 70231.88 ms. Allocated memory was 305.1 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 220.0 MB in the beginning and 1.2 GB in the end (delta: -969.1 MB). Peak memory consumption was 1.0 GB. Max. memory is 5.3 GB. [2018-01-21 10:21:04,781 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 305.1 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 214.15 ms. Allocated memory is still 305.1 MB. Free memory was 262.5 MB in the beginning and 250.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.88 ms. Allocated memory is still 305.1 MB. Free memory was 250.5 MB in the beginning and 248.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 467.14 ms. Allocated memory is still 305.1 MB. Free memory was 248.5 MB in the beginning and 222.0 MB in the end (delta: 26.5 MB). Peak memory consumption was 26.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 70231.88 ms. Allocated memory was 305.1 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 220.0 MB in the beginning and 1.2 GB in the end (delta: -969.1 MB). Peak memory consumption was 1.0 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - 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 3 procedures, 92 locations, 3 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=92occurred 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 - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L630] EXPR, FCALL malloc(sizeof(*root)) VAL [malloc(sizeof(*root))={14:0}] [L630] struct TreeNode* root = malloc(sizeof(*root)), *n; VAL [malloc(sizeof(*root))={14:0}, root={14:0}] [L631] FCALL root->left = ((void *)0) VAL [malloc(sizeof(*root))={14:0}, root={14:0}] [L632] FCALL root->right = ((void *)0) VAL [malloc(sizeof(*root))={14:0}, root={14:0}] [L633] FCALL root->parent = ((void *)0) VAL [malloc(sizeof(*root))={14:0}, root={14:0}] [L634] COND FALSE !(__VERIFIER_nondet_int()) [L655] n = ((void *)0) VAL [malloc(sizeof(*root))={14:0}, n={0:0}, root={14:0}] [L656] EXPR, FCALL malloc(sizeof(*s)) VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={0:0}, root={14:0}] [L656] struct StackItem* s = malloc(sizeof(*s)), *st; VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={0:0}, root={14:0}, s={15:0}] [L657] FCALL s->next = ((void *)0) VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={0:0}, root={14:0}, s={15:0}] [L658] FCALL s->node = root VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={0:0}, root={14:0}, s={15:0}] [L659] COND TRUE s != ((void *)0) [L660] st = s VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={0:0}, root={14:0}, s={15:0}, s={15:0}] [L661] EXPR, FCALL s->next VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={0:0}, root={14:0}, s={15:0}, s={15:0}, s->next={0:0}] [L661] s = s->next [L662] EXPR, FCALL st->node VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={0:0}, root={14:0}, s={0:0}, s={15:0}, st->node={14:0}] [L662] n = st->node [L663] FCALL free(st) VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={14:0}, root={14:0}, s={0:0}, s={15:0}] [L664] FCALL n->left VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={14:0}, n->left={0:0}, root={14:0}, s={15:0}, s={0:0}] [L664] COND FALSE !(n->left) [L670] FCALL n->right VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={14:0}, n->right={0:0}, root={14:0}, s={0:0}, s={15:0}] [L670] COND FALSE !(n->right) [L676] FCALL free(n) VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={14:0}, root={14:0}, s={15:0}, s={0:0}] [L659] COND FALSE !(s != ((void *)0)) VAL [malloc(sizeof(*root))={14:0}, malloc(sizeof(*s))={15:0}, n={14:0}, root={14:0}, s={0:0}, s={15:0}] [L678] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 3 procedures, 92 locations, 3 error locations. UNSAFE Result, 0.5s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 196 SDtfs, 38 SDslu, 154 SDs, 0 SdLazy, 13 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred 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: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 1274 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 620]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 620). Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 3 procedures, 92 locations, 3 error locations. TIMEOUT Result, 69.4s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 194 SDtfs, 38 SDslu, 150 SDs, 0 SdLazy, 13 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 68.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 1080 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/tree_parent_ptr_true-valid-memsafety_false-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_10-21-04-790.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/tree_parent_ptr_true-valid-memsafety_false-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_10-21-04-790.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/tree_parent_ptr_true-valid-memsafety_false-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_10-21-04-790.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/tree_parent_ptr_true-valid-memsafety_false-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_smtcomp.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_10-21-04-790.csv Completed graceful shutdown