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/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/list-properties/simple_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 16:07:03,656 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 16:07:03,659 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 16:07:03,675 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 16:07:03,675 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 16:07:03,676 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 16:07:03,678 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 16:07:03,679 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 16:07:03,681 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 16:07:03,682 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 16:07:03,683 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 16:07:03,684 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 16:07:03,685 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 16:07:03,686 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 16:07:03,687 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 16:07:03,690 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 16:07:03,692 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 16:07:03,694 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 16:07:03,695 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 16:07:03,697 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 16:07:03,699 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 16:07:03,700 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 16:07:03,700 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 16:07:03,701 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 16:07:03,702 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 16:07:03,703 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 16:07:03,703 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 16:07:03,704 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 16:07:03,704 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 16:07:03,704 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 16:07:03,705 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 16:07:03,705 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-24 16:07:03,714 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 16:07:03,714 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 16:07:03,715 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 16:07:03,715 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 16:07:03,715 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 16:07:03,715 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 16:07:03,715 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 16:07:03,716 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 16:07:03,716 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 16:07:03,716 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 16:07:03,716 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 16:07:03,716 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 16:07:03,717 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 16:07:03,717 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 16:07:03,717 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 16:07:03,717 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 16:07:03,717 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 16:07:03,717 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 16:07:03,717 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 16:07:03,718 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 16:07:03,718 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 16:07:03,718 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 16:07:03,718 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 16:07:03,718 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 16:07:03,718 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 16:07:03,719 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 16:07:03,720 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 16:07:03,720 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 16:07:03,753 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 16:07:03,764 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 16:07:03,768 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 16:07:03,770 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 16:07:03,770 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 16:07:03,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple_true-unreach-call_false-valid-memtrack.i [2018-01-24 16:07:03,934 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 16:07:03,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 16:07:03,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 16:07:03,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 16:07:03,948 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 16:07:03,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:07:03" (1/1) ... [2018-01-24 16:07:03,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f741a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:03, skipping insertion in model container [2018-01-24 16:07:03,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 04:07:03" (1/1) ... [2018-01-24 16:07:03,968 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:07:04,010 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 16:07:04,141 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:07:04,158 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 16:07:04,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04 WrapperNode [2018-01-24 16:07:04,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 16:07:04,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 16:07:04,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 16:07:04,167 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 16:07:04,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (1/1) ... [2018-01-24 16:07:04,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (1/1) ... [2018-01-24 16:07:04,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (1/1) ... [2018-01-24 16:07:04,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (1/1) ... [2018-01-24 16:07:04,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (1/1) ... [2018-01-24 16:07:04,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (1/1) ... [2018-01-24 16:07:04,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (1/1) ... [2018-01-24 16:07:04,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 16:07:04,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 16:07:04,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 16:07:04,208 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 16:07:04,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (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 [2018-01-24 16:07:04,264 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 16:07:04,264 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 16:07:04,264 INFO L136 BoogieDeclarations]: Found implementation of procedure exit [2018-01-24 16:07:04,264 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 16:07:04,265 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 16:07:04,265 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 16:07:04,265 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 16:07:04,265 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 16:07:04,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 16:07:04,265 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 16:07:04,266 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 16:07:04,266 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-24 16:07:04,266 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 16:07:04,266 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 16:07:04,266 INFO L128 BoogieDeclarations]: Found specification of procedure exit [2018-01-24 16:07:04,266 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 16:07:04,267 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 16:07:04,267 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 16:07:04,492 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 16:07:04,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:07:04 BoogieIcfgContainer [2018-01-24 16:07:04,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 16:07:04,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 16:07:04,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 16:07:04,496 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 16:07:04,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 04:07:03" (1/3) ... [2018-01-24 16:07:04,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4709647d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:07:04, skipping insertion in model container [2018-01-24 16:07:04,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 04:07:04" (2/3) ... [2018-01-24 16:07:04,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4709647d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 04:07:04, skipping insertion in model container [2018-01-24 16:07:04,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 04:07:04" (3/3) ... [2018-01-24 16:07:04,500 INFO L105 eAbstractionObserver]: Analyzing ICFG simple_true-unreach-call_false-valid-memtrack.i [2018-01-24 16:07:04,507 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 16:07:04,512 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2018-01-24 16:07:04,559 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 16:07:04,559 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 16:07:04,559 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 16:07:04,559 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 16:07:04,560 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 16:07:04,560 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 16:07:04,560 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 16:07:04,560 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 16:07:04,561 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 16:07:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2018-01-24 16:07:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-24 16:07:04,592 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:04,593 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:07:04,593 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:04,598 INFO L82 PathProgramCache]: Analyzing trace with hash 33713669, now seen corresponding path program 1 times [2018-01-24 16:07:04,601 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:04,642 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:04,642 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:04,642 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:04,642 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:04,693 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:07:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:04,727 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:07:04,727 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 16:07:04,727 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:07:04,729 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 16:07:04,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 16:07:04,740 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 16:07:04,742 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2018-01-24 16:07:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:07:04,762 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2018-01-24 16:07:04,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 16:07:04,764 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-01-24 16:07:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:07:04,771 INFO L225 Difference]: With dead ends: 77 [2018-01-24 16:07:04,771 INFO L226 Difference]: Without dead ends: 45 [2018-01-24 16:07:04,774 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 [2018-01-24 16:07:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-01-24 16:07:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-01-24 16:07:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-24 16:07:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-01-24 16:07:04,878 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 11 [2018-01-24 16:07:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:07:04,879 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-01-24 16:07:04,879 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 16:07:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-01-24 16:07:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 16:07:04,880 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:04,880 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:07:04,880 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1961763874, now seen corresponding path program 1 times [2018-01-24 16:07:04,880 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:04,881 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:04,881 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:04,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:04,882 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:04,900 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:07:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:04,984 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:07:04,984 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 16:07:04,984 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:07:04,986 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:07:04,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:07:04,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:07:04,987 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 5 states. [2018-01-24 16:07:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:07:05,173 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-01-24 16:07:05,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:07:05,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-24 16:07:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:07:05,175 INFO L225 Difference]: With dead ends: 62 [2018-01-24 16:07:05,175 INFO L226 Difference]: Without dead ends: 55 [2018-01-24 16:07:05,176 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:07:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-24 16:07:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2018-01-24 16:07:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-01-24 16:07:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2018-01-24 16:07:05,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 13 [2018-01-24 16:07:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:07:05,186 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2018-01-24 16:07:05,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:07:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2018-01-24 16:07:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 16:07:05,186 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:05,187 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:07:05,187 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1961763873, now seen corresponding path program 1 times [2018-01-24 16:07:05,187 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:05,188 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:05,188 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:05,189 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:05,189 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:05,206 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:07:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:05,315 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:07:05,315 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 16:07:05,320 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:07:05,321 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:07:05,321 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:07:05,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:07:05,321 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 5 states. [2018-01-24 16:07:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:07:05,470 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2018-01-24 16:07:05,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:07:05,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-24 16:07:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:07:05,472 INFO L225 Difference]: With dead ends: 70 [2018-01-24 16:07:05,472 INFO L226 Difference]: Without dead ends: 63 [2018-01-24 16:07:05,472 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:07:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-24 16:07:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2018-01-24 16:07:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-24 16:07:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2018-01-24 16:07:05,481 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 13 [2018-01-24 16:07:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:07:05,481 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2018-01-24 16:07:05,481 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:07:05,482 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2018-01-24 16:07:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 16:07:05,482 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:05,483 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 16:07:05,483 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash 722281926, now seen corresponding path program 1 times [2018-01-24 16:07:05,483 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:05,484 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:05,485 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:05,485 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:05,485 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:05,500 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:07:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:05,572 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:07:05,572 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 16:07:05,572 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:07:05,572 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 16:07:05,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 16:07:05,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 16:07:05,573 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 5 states. [2018-01-24 16:07:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:07:05,679 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-01-24 16:07:05,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 16:07:05,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-24 16:07:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:07:05,681 INFO L225 Difference]: With dead ends: 63 [2018-01-24 16:07:05,681 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 16:07:05,682 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 [2018-01-24 16:07:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 16:07:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2018-01-24 16:07:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-24 16:07:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-01-24 16:07:05,689 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 19 [2018-01-24 16:07:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:07:05,690 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-01-24 16:07:05,690 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 16:07:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-01-24 16:07:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 16:07:05,691 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:05,691 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] [2018-01-24 16:07:05,691 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:05,691 INFO L82 PathProgramCache]: Analyzing trace with hash 587467943, now seen corresponding path program 1 times [2018-01-24 16:07:05,691 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:05,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:05,693 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:05,693 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:05,693 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:05,712 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:07:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:05,794 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:07:05,795 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 16:07:05,795 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:07:05,795 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 16:07:05,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 16:07:05,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:07:05,796 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 7 states. [2018-01-24 16:07:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:07:06,145 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-01-24 16:07:06,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-24 16:07:06,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-24 16:07:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:07:06,147 INFO L225 Difference]: With dead ends: 75 [2018-01-24 16:07:06,147 INFO L226 Difference]: Without dead ends: 73 [2018-01-24 16:07:06,148 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-01-24 16:07:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-24 16:07:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2018-01-24 16:07:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 16:07:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-01-24 16:07:06,152 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 23 [2018-01-24 16:07:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:07:06,153 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-01-24 16:07:06,153 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 16:07:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-01-24 16:07:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 16:07:06,154 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:06,154 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] [2018-01-24 16:07:06,154 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash 587467944, now seen corresponding path program 1 times [2018-01-24 16:07:06,154 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:06,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:06,155 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:06,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:06,155 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:06,168 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:07:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:06,254 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 16:07:06,255 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 16:07:06,255 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 16:07:06,255 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 16:07:06,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 16:07:06,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 16:07:06,256 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 7 states. [2018-01-24 16:07:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:07:06,520 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-01-24 16:07:06,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 16:07:06,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-01-24 16:07:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:07:06,522 INFO L225 Difference]: With dead ends: 74 [2018-01-24 16:07:06,522 INFO L226 Difference]: Without dead ends: 69 [2018-01-24 16:07:06,523 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-01-24 16:07:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-24 16:07:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2018-01-24 16:07:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-24 16:07:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-01-24 16:07:06,529 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 23 [2018-01-24 16:07:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:07:06,530 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-01-24 16:07:06,530 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 16:07:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-01-24 16:07:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 16:07:06,531 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:06,531 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] [2018-01-24 16:07:06,531 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:06,531 INFO L82 PathProgramCache]: Analyzing trace with hash 857300197, now seen corresponding path program 1 times [2018-01-24 16:07:06,532 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:06,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:06,533 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:06,533 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:06,533 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:06,548 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 16:07:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:06,776 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 16:07:06,776 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 16:07:06,777 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-01-24 16:07:06,779 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [9], [13], [15], [18], [43], [46], [49], [53], [59], [60], [61], [69], [71], [74], [85], [86], [94], [95], [96] [2018-01-24 16:07:06,826 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 16:07:06,826 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-24 16:07:22,636 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-24 16:07:22,637 INFO L268 AbstractInterpreter]: Visited 22 different actions 33 times. Merged at 7 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-01-24 16:07:22,648 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-24 16:07:22,648 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 16:07:22,648 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 [2018-01-24 16:07:22,654 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:22,654 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 16:07:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:22,684 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 16:07:22,755 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-24 16:07:22,757 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 16:07:22,757 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,759 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,765 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-24 16:07:22,767 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 16:07:22,767 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,769 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,773 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,773 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2018-01-24 16:07:22,820 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 16:07:22,827 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 16:07:22,827 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,829 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,836 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 16:07:22,839 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 16:07:22,839 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,841 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:22,845 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2018-01-24 16:07:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:22,849 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 16:07:23,053 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2018-01-24 16:07:23,055 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-01-24 16:07:23,055 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,079 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,081 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2018-01-24 16:07:23,083 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-01-24 16:07:23,083 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,087 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,114 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2018-01-24 16:07:23,115 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-01-24 16:07:23,116 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,119 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,121 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2018-01-24 16:07:23,122 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-01-24 16:07:23,122 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,125 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:23,144 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-01-24 16:07:23,144 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:53, output treesize:24 [2018-01-24 16:07:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:23,241 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 16:07:23,241 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-24 16:07:23,244 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:23,245 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-24 16:07:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 16:07:24,129 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-24 16:07:24,142 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-01-24 16:07:24,144 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-01-24 16:07:24,144 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,145 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,160 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2018-01-24 16:07:24,162 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2018-01-24 16:07:24,163 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,164 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,167 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,168 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:40, output treesize:10 [2018-01-24 16:07:24,172 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-24 16:07:24,174 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 16:07:24,174 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,177 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,184 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-01-24 16:07:24,186 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-01-24 16:07:24,186 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,187 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,191 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,192 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2018-01-24 16:07:24,214 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 16:07:24,216 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 16:07:24,216 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,217 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,222 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-01-24 16:07:24,223 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-01-24 16:07:24,224 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,226 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,229 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,229 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2018-01-24 16:07:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:24,231 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-24 16:07:24,319 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-01-24 16:07:24,321 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2018-01-24 16:07:24,321 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,325 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,328 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-01-24 16:07:24,330 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2018-01-24 16:07:24,330 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,335 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,369 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 26 [2018-01-24 16:07:24,371 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2018-01-24 16:07:24,372 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,374 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,376 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 26 [2018-01-24 16:07:24,378 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2018-01-24 16:07:24,378 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,381 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,406 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-01-24 16:07:24,412 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-01-24 16:07:24,413 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,417 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,419 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2018-01-24 16:07:24,422 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-01-24 16:07:24,423 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,424 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-24 16:07:24,444 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-01-24 16:07:24,444 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:105, output treesize:7 [2018-01-24 16:07:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 16:07:24,462 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-24 16:07:24,462 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11, 9, 8] total 21 [2018-01-24 16:07:24,462 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-24 16:07:24,463 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-24 16:07:24,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-24 16:07:24,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2018-01-24 16:07:24,463 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-01-24 16:07:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 16:07:24,782 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-01-24 16:07:24,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 16:07:24,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-01-24 16:07:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 16:07:24,783 INFO L225 Difference]: With dead ends: 76 [2018-01-24 16:07:24,783 INFO L226 Difference]: Without dead ends: 64 [2018-01-24 16:07:24,784 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2018-01-24 16:07:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-01-24 16:07:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2018-01-24 16:07:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-24 16:07:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-01-24 16:07:24,791 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 24 [2018-01-24 16:07:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 16:07:24,792 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-01-24 16:07:24,792 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-24 16:07:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-01-24 16:07:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 16:07:24,793 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 16:07:24,793 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] [2018-01-24 16:07:24,793 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr9RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr14EnsuresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation]=== [2018-01-24 16:07:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash 806501016, now seen corresponding path program 1 times [2018-01-24 16:07:24,793 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 16:07:24,794 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:24,794 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 16:07:24,794 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 16:07:24,795 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 16:07:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 16:07:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 16:07:24,838 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 16:07:24,850 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-24 16:07:24,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 04:07:24 BoogieIcfgContainer [2018-01-24 16:07:24,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 16:07:24,865 INFO L168 Benchmark]: Toolchain (without parser) took 20929.58 ms. Allocated memory was 299.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 258.9 MB in the beginning and 397.1 MB in the end (delta: -138.2 MB). Peak memory consumption was 1.0 GB. Max. memory is 5.3 GB. [2018-01-24 16:07:24,865 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 299.9 MB. Free memory is still 264.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 16:07:24,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.55 ms. Allocated memory is still 299.9 MB. Free memory was 258.9 MB in the beginning and 248.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:07:24,866 INFO L168 Benchmark]: Boogie Preprocessor took 41.11 ms. Allocated memory is still 299.9 MB. Free memory was 248.9 MB in the beginning and 246.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:07:24,866 INFO L168 Benchmark]: RCFGBuilder took 284.93 ms. Allocated memory is still 299.9 MB. Free memory was 246.9 MB in the beginning and 226.4 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 5.3 GB. [2018-01-24 16:07:24,866 INFO L168 Benchmark]: TraceAbstraction took 20369.79 ms. Allocated memory was 299.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 226.4 MB in the beginning and 397.1 MB in the end (delta: -170.7 MB). Peak memory consumption was 1000.0 MB. Max. memory is 5.3 GB. [2018-01-24 16:07:24,868 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 299.9 MB. Free memory is still 264.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 223.55 ms. Allocated memory is still 299.9 MB. Free memory was 258.9 MB in the beginning and 248.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 41.11 ms. Allocated memory is still 299.9 MB. Free memory was 248.9 MB in the beginning and 246.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 284.93 ms. Allocated memory is still 299.9 MB. Free memory was 246.9 MB in the beginning and 226.4 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 20369.79 ms. Allocated memory was 299.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 226.4 MB in the beginning and 397.1 MB in the end (delta: -170.7 MB). Peak memory consumption was 1000.0 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 21 LocStat_MAX_WEQGRAPH_SIZE : 16 LocStat_MAX_SIZEOF_WEQEDGELABEL : 9 LocStat_NO_SUPPORTING_EQUALITIES : 215 LocStat_NO_SUPPORTING_DISEQUALITIES : 67 LocStat_NO_DISJUNCTIONS : -42 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 26 TransStat_MAX_WEQGRAPH_SIZE : 14 TransStat_MAX_SIZEOF_WEQEDGELABEL : 4 TransStat_NO_SUPPORTING_EQUALITIES : 43 TransStat_NO_SUPPORTING_DISEQUALITIES : 9 TransStat_NO_DISJUNCTIONS : 28 TransStat_MAX_NO_DISJUNCTIONS : 2 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 139.444019 RENAME_VARIABLES(MILLISECONDS) : 47.443312 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 139.354136 PROJECTAWAY(MILLISECONDS) : 0.174585 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.071600 DISJOIN(MILLISECONDS) : 30.557138 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 47.515217 ADD_EQUALITY(MILLISECONDS) : 0.018716 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.029932 #CONJOIN_DISJUNCTIVE : 59 #RENAME_VARIABLES : 101 #UNFREEZE : 0 #CONJOIN : 104 #PROJECTAWAY : 76 #ADD_WEAK_EQUALITY : 15 #DISJOIN : 12 #RENAME_VARIABLES_DISJUNCTIVE : 95 #ADD_EQUALITY : 52 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 6 * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 626. Possible FailurePath: [L627] EXPR, FCALL malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={10:0}] [L627] List a = (List) malloc(sizeof(struct node)); VAL [a={10:0}, malloc(sizeof(struct node))={10:0}] [L628] COND FALSE !(a == 0) VAL [a={10:0}, malloc(sizeof(struct node))={10:0}] [L629] List t; [L630] List p = a; VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={10:0}] [L631] COND FALSE !(__VERIFIER_nondet_int()) [L638] FCALL p->h = 1 VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={10:0}] [L639] FCALL p->n = 0 VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={10:0}] [L640] p = a VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={10:0}] [L641] COND TRUE p!=0 VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={10:0}] [L642] EXPR, FCALL p->h VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, p->h=1] [L642] COND FALSE !(p->h != 1) [L645] EXPR, FCALL p->n VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={10:0}, p->n={0:0}] [L645] p = p->n [L641] COND FALSE !(p!=0) VAL [a={10:0}, malloc(sizeof(struct node))={10:0}, p={0:0}] [L647] return 0; VAL [\result=0, a={10:0}, malloc(sizeof(struct node))={10:0}, p={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 55 locations, 15 error locations. UNSAFE Result, 20.3s OverallTime, 8 OverallIterations, 2 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 226 SDtfs, 687 SDslu, 418 SDs, 0 SdLazy, 505 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 15.8s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 74 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 199 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 211 ConstructedInterpolants, 1 QuantifiedInterpolants, 32803 SizeOfPredicates, 28 NumberOfNonLiveVariables, 190 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 11/21 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_true-unreach-call_false-valid-memtrack.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_16-07-24-877.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_true-unreach-call_false-valid-memtrack.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-24_16-07-24-877.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_true-unreach-call_false-valid-memtrack.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-24_16-07-24-877.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_true-unreach-call_false-valid-memtrack.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_16-07-24-877.csv Received shutdown request...