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.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-optional_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:07:07,353 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:07:07,355 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:07:07,369 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:07:07,369 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:07:07,370 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:07:07,370 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:07:07,371 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:07:07,374 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:07:07,375 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:07:07,375 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:07:07,376 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:07:07,377 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:07:07,378 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:07:07,378 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:07:07,381 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:07:07,383 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:07:07,385 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:07:07,386 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:07:07,387 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:07:07,389 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:07:07,394 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 00:07:07,395 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 00:07:07,395 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.epf [2018-01-21 00:07:07,405 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:07:07,406 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:07:07,406 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:07:07,407 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:07:07,407 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:07:07,407 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:07:07,407 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:07:07,408 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:07:07,408 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:07:07,408 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:07:07,409 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:07:07,409 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:07:07,409 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:07:07,409 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:07:07,409 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:07:07,410 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:07:07,410 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:07:07,410 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:07:07,410 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:07:07,410 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:07:07,411 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:07:07,411 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:07:07,411 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:07:07,411 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:07:07,411 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:07:07,412 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:07:07,412 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:07:07,412 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:07:07,412 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:07:07,412 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:07:07,413 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:07:07,413 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:07:07,413 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:07:07,413 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:07:07,413 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:07:07,414 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:07:07,414 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:07:07,415 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:07:07,448 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:07:07,461 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:07:07,464 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:07:07,465 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:07:07,465 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:07:07,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:07:07,625 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:07:07,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:07:07,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:07:07,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:07:07,636 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:07:07,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1589c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07, skipping insertion in model container [2018-01-21 00:07:07,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,660 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:07:07,701 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:07:07,820 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:07:07,843 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:07:07,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07 WrapperNode [2018-01-21 00:07:07,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:07:07,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:07:07,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:07:07,854 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:07:07,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (1/1) ... [2018-01-21 00:07:07,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:07:07,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:07:07,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:07:07,898 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:07:07,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (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 00:07:07,949 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:07:07,949 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:07:07,949 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:07:07,949 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:07:07,950 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:07:07,950 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:07:07,950 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:07:07,950 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:07:07,950 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:07:07,951 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:07:07,951 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:07:07,951 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:07:07,951 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:07:07,951 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 00:07:07,951 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:07:07,952 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:07:07,952 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:07:08,357 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:07:08,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:07:08 BoogieIcfgContainer [2018-01-21 00:07:08,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:07:08,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:07:08,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:07:08,360 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:07:08,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:07:07" (1/3) ... [2018-01-21 00:07:08,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c072597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:07:08, skipping insertion in model container [2018-01-21 00:07:08,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:07:07" (2/3) ... [2018-01-21 00:07:08,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c072597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:07:08, skipping insertion in model container [2018-01-21 00:07:08,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:07:08" (3/3) ... [2018-01-21 00:07:08,364 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:07:08,371 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:07:08,378 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 00:07:08,426 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:07:08,426 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:07:08,426 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:07:08,426 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:07:08,427 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:07:08,427 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:07:08,427 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:07:08,427 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:07:08,428 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:07:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2018-01-21 00:07:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:07:08,456 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:08,457 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:07:08,457 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:07:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash 199372, now seen corresponding path program 1 times [2018-01-21 00:07:08,464 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:08,507 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:08,507 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:08,507 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:08,508 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:07:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:07:08,562 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:07:08,568 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:07:08,574 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:07:08,575 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:07:08,575 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:07:08,575 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:07:08,575 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:07:08,575 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:07:08,575 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:07:08,575 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:07:08,575 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:07:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2018-01-21 00:07:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 00:07:08,580 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:08,580 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 00:07:08,580 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:07:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2056818696, now seen corresponding path program 1 times [2018-01-21 00:07:08,581 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:08,582 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:08,582 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:08,582 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:08,582 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:07:08,618 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:07:08,749 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 00:07:08,750 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:07:08,751 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:07:08,751 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:07:08,753 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:07:08,768 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:07:08,768 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:07:08,771 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 2 states. [2018-01-21 00:07:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:07:08,793 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2018-01-21 00:07:08,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:07:08,795 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-01-21 00:07:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:07:08,808 INFO L225 Difference]: With dead ends: 128 [2018-01-21 00:07:08,808 INFO L226 Difference]: Without dead ends: 85 [2018-01-21 00:07:08,811 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 00:07:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-21 00:07:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-01-21 00:07:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-21 00:07:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-21 00:07:08,846 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 24 [2018-01-21 00:07:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:07:08,846 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-21 00:07:08,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:07:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-21 00:07:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 00:07:08,847 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:08,848 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] [2018-01-21 00:07:08,848 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:07:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1534244515, now seen corresponding path program 1 times [2018-01-21 00:07:08,848 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:08,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:08,849 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:08,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:08,849 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:07:08,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:07:08,962 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 00:07:08,962 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:07:08,962 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:07:08,962 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:07:08,964 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:07:08,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:07:08,964 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:07:08,965 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 5 states. [2018-01-21 00:07:09,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:07:09,111 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2018-01-21 00:07:09,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:07:09,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 00:07:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:07:09,114 INFO L225 Difference]: With dead ends: 148 [2018-01-21 00:07:09,115 INFO L226 Difference]: Without dead ends: 132 [2018-01-21 00:07:09,115 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:07:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-01-21 00:07:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2018-01-21 00:07:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 00:07:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2018-01-21 00:07:09,123 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 28 [2018-01-21 00:07:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:07:09,123 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2018-01-21 00:07:09,123 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:07:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2018-01-21 00:07:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-21 00:07:09,125 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:09,125 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:07:09,125 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:07:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1052367185, now seen corresponding path program 1 times [2018-01-21 00:07:09,125 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:09,126 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,126 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:09,126 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,126 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:07:09,148 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:07:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:07:09,212 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:07:09,212 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:07:09,212 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:07:09,213 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:07:09,213 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:07:09,213 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:07:09,214 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 5 states. [2018-01-21 00:07:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:07:09,265 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2018-01-21 00:07:09,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 00:07:09,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2018-01-21 00:07:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:07:09,267 INFO L225 Difference]: With dead ends: 140 [2018-01-21 00:07:09,267 INFO L226 Difference]: Without dead ends: 101 [2018-01-21 00:07:09,268 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 00:07:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-21 00:07:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2018-01-21 00:07:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-21 00:07:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2018-01-21 00:07:09,276 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 49 [2018-01-21 00:07:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:07:09,276 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2018-01-21 00:07:09,276 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:07:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2018-01-21 00:07:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-01-21 00:07:09,277 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:09,277 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:07:09,277 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:07:09,278 INFO L82 PathProgramCache]: Analyzing trace with hash -280906860, now seen corresponding path program 1 times [2018-01-21 00:07:09,278 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:09,279 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,279 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:09,279 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,279 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:07:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:07:09,343 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:07:09,353 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:07:09,361 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:07:09,361 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:07:09,371 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:07:09,371 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:07:09,371 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:07:09,371 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:07:09,372 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:07:09,372 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:07:09,372 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:07:09,372 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:07:09,372 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:07:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2018-01-21 00:07:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 00:07:09,374 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:09,374 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 00:07:09,374 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:07:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1857075517, now seen corresponding path program 1 times [2018-01-21 00:07:09,374 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:09,375 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,375 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:09,375 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,375 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:07:09,385 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:07:09,398 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 00:07:09,398 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:07:09,398 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:07:09,398 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:07:09,399 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:07:09,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:07:09,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:07:09,399 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 2 states. [2018-01-21 00:07:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:07:09,405 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2018-01-21 00:07:09,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:07:09,405 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 00:07:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:07:09,406 INFO L225 Difference]: With dead ends: 128 [2018-01-21 00:07:09,407 INFO L226 Difference]: Without dead ends: 83 [2018-01-21 00:07:09,407 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 00:07:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-01-21 00:07:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-01-21 00:07:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-21 00:07:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-01-21 00:07:09,414 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 22 [2018-01-21 00:07:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:07:09,414 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-01-21 00:07:09,414 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:07:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-01-21 00:07:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 00:07:09,415 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:09,416 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] [2018-01-21 00:07:09,416 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 00:07:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1003988962, now seen corresponding path program 1 times [2018-01-21 00:07:09,416 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:09,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,417 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:09,417 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,417 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:07:09,428 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:07:09,466 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 00:07:09,466 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:07:09,466 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:07:09,467 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:07:09,467 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:07:09,467 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:07:09,468 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:07:09,468 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 5 states. [2018-01-21 00:07:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:07:09,659 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2018-01-21 00:07:09,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:07:09,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2018-01-21 00:07:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:07:09,661 INFO L225 Difference]: With dead ends: 144 [2018-01-21 00:07:09,661 INFO L226 Difference]: Without dead ends: 130 [2018-01-21 00:07:09,662 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:07:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-21 00:07:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 87. [2018-01-21 00:07:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-21 00:07:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-01-21 00:07:09,671 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 26 [2018-01-21 00:07:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:07:09,672 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-01-21 00:07:09,672 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:07:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-01-21 00:07:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-01-21 00:07:09,673 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:09,673 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:07:09,673 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 00:07:09,674 INFO L82 PathProgramCache]: Analyzing trace with hash 68134102, now seen corresponding path program 1 times [2018-01-21 00:07:09,674 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:09,675 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,675 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:09,675 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,675 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:07:09,689 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:07:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:07:09,789 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:07:09,789 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:07:09,790 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:07:09,790 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:07:09,790 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:07:09,790 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:07:09,791 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 5 states. [2018-01-21 00:07:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:07:09,877 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2018-01-21 00:07:09,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 00:07:09,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2018-01-21 00:07:09,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:07:09,878 INFO L225 Difference]: With dead ends: 136 [2018-01-21 00:07:09,879 INFO L226 Difference]: Without dead ends: 99 [2018-01-21 00:07:09,879 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 00:07:09,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-21 00:07:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2018-01-21 00:07:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-21 00:07:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2018-01-21 00:07:09,889 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 47 [2018-01-21 00:07:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:07:09,889 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2018-01-21 00:07:09,890 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:07:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2018-01-21 00:07:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-21 00:07:09,891 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:07:09,892 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:07:09,892 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 00:07:09,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2109787175, now seen corresponding path program 1 times [2018-01-21 00:07:09,892 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:07:09,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,893 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:07:09,894 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:07:09,894 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:07:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:07:09,913 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:07:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:07:10,074 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:07:10,075 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:07:10,075 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2018-01-21 00:07:10,077 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [15], [18], [19], [20], [26], [30], [32], [35], [71], [75], [79], [81], [85], [86], [87], [94], [96], [104], [106], [111], [112], [113], [119], [123], [129], [130], [134], [138], [142], [144], [145], [146], [147], [155], [157], [161], [163], [164], [165], [171], [172], [173] [2018-01-21 00:07:10,133 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:07:10,133 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-21 00:08:18,289 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-21 00:08:18,289 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-21 00:08:18,325 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 00:08:18,325 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:08:18,325 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 00:08:18,340 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:18,340 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:08:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:08:18,380 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:08:18,383 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 00:08:18,384 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 00:08:18,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 12:08:18 BoogieIcfgContainer [2018-01-21 00:08:18,386 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 00:08:18,387 INFO L168 Benchmark]: Toolchain (without parser) took 70761.37 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 266.6 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 118.2 MB. Max. memory is 5.3 GB. [2018-01-21 00:08:18,389 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 306.7 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:08:18,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.94 ms. Allocated memory is still 306.7 MB. Free memory was 265.6 MB in the beginning and 253.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:08:18,390 INFO L168 Benchmark]: Boogie Preprocessor took 43.78 ms. Allocated memory is still 306.7 MB. Free memory was 253.6 MB in the beginning and 251.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:08:18,390 INFO L168 Benchmark]: RCFGBuilder took 459.95 ms. Allocated memory is still 306.7 MB. Free memory was 251.6 MB in the beginning and 223.6 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:08:18,390 INFO L168 Benchmark]: TraceAbstraction took 70027.68 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 223.6 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 75.2 MB. Max. memory is 5.3 GB. [2018-01-21 00:08:18,392 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 306.7 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 222.94 ms. Allocated memory is still 306.7 MB. Free memory was 265.6 MB in the beginning and 253.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 43.78 ms. Allocated memory is still 306.7 MB. Free memory was 253.6 MB in the beginning and 251.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 459.95 ms. Allocated memory is still 306.7 MB. Free memory was 251.6 MB in the beginning and 223.6 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 70027.68 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 223.6 MB in the beginning and 2.1 GB in the end (delta: -1.9 GB). Peak memory consumption was 75.2 MB. 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, 88 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=88occurred 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: [L986] EXPR, FCALL malloc(sizeof(SLL)) VAL [malloc(sizeof(SLL))={21:0}] [L986] SLL* head = malloc(sizeof(SLL)); VAL [head={21:0}, malloc(sizeof(SLL))={21:0}] [L987] FCALL head->next = ((void*)0) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}] [L988] FCALL head->prev = ((void*)0) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}] [L989] COND FALSE !(__VERIFIER_nondet_int()) [L989] COND TRUE __VERIFIER_nondet_int() [L989] FCALL head->data = 1 VAL [head={21:0}, malloc(sizeof(SLL))={21:0}] [L989] FCALL head->opt = head VAL [head={21:0}, malloc(sizeof(SLL))={21:0}] [L990] SLL* x = head; VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}] [L992] COND FALSE !(__VERIFIER_nondet_int()) [L995] x = head VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}] [L996] COND TRUE x != ((void*)0) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}] [L998] EXPR, FCALL x->data VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->data=1] [L998] EXPR x->data == 2 && x->opt != x VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->data=1, x->data == 2 && x->opt != x=0] [L998] EXPR x->data == 2 && x->opt != x && x->opt->next == ((void*)0) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->data=1, x->data == 2 && x->opt != x=0, x->data == 2 && x->opt != x && x->opt->next == ((void*)0)=0] [L998] EXPR (x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x VAL [(x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x=0, head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->data=1, x->data == 2 && x->opt != x=0, x->data == 2 && x->opt != x && x->opt->next == ((void*)0)=0] [L998] EXPR, FCALL x->opt VAL [(x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x=0, head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->data=1, x->data == 2 && x->opt != x=0, x->data == 2 && x->opt != x && x->opt->next == ((void*)0)=0, x->opt={21:0}] [L998] EXPR (x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x VAL [(x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x=1, head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->data=1, x->data == 2 && x->opt != x=0, x->data == 2 && x->opt != x && x->opt->next == ((void*)0)=0, x->opt={21:0}] [L998] COND FALSE !(!((x->data == 2 && x->opt != x && x->opt->next == ((void*)0)) || x->opt == x)) [L998] COND FALSE !(0) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}] [L999] EXPR, FCALL x->next VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->next={0:0}] [L999] x = x->next [L996] COND FALSE !(x != ((void*)0)) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={0:0}] [L1002] x = head VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}] [L1004] COND TRUE x != ((void*)0) [L1006] head = x VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}] [L1007] EXPR, FCALL x->next VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={21:0}, x->next={0:0}] [L1007] x = x->next [L1008] EXPR, FCALL head->data VAL [head={21:0}, head->data=1, malloc(sizeof(SLL))={21:0}, x={0:0}] [L1008] COND FALSE !(head->data == 2) [L1010] FCALL free(head) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={0:0}] [L1004] COND FALSE !(x != ((void*)0)) VAL [head={21:0}, malloc(sizeof(SLL))={21:0}, x={0:0}] [L1013] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 3 procedures, 88 locations, 3 error locations. UNSAFE Result, 0.7s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 254 SDtfs, 297 SDslu, 340 SDs, 0 SdLazy, 96 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=3, 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, 3 MinimizatonAttempts, 51 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 4969 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 983]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 983). Cancelled while BasicCegarLoop was analyzing trace of length 50 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, 88 locations, 3 error locations. TIMEOUT Result, 69.0s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 250 SDtfs, 297 SDslu, 328 SDs, 0 SdLazy, 96 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 68.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 51 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 4491 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 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/dll-optional_true-unreach-call_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_00-08-18-400.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dll-optional_true-unreach-call_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_00-08-18-400.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dll-optional_true-unreach-call_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_00-08-18-400.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dll-optional_true-unreach-call_true-valid-memsafety.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_00-08-18-400.csv Completed graceful shutdown