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_mostprecise.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 20:41:20,320 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 20:41:20,322 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 20:41:20,337 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 20:41:20,338 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 20:41:20,339 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 20:41:20,340 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 20:41:20,341 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 20:41:20,343 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 20:41:20,344 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 20:41:20,345 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 20:41:20,345 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 20:41:20,346 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 20:41:20,347 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 20:41:20,348 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 20:41:20,351 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 20:41:20,353 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 20:41:20,355 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 20:41:20,356 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 20:41:20,357 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 20:41:20,360 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-24 20:41:20,365 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 20:41:20,365 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 20:41:20,366 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_mostprecise.epf [2018-01-24 20:41:20,374 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 20:41:20,374 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 20:41:20,375 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 20:41:20,375 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 20:41:20,375 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 20:41:20,376 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 20:41:20,376 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 20:41:20,376 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-24 20:41:20,376 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 20:41:20,376 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 20:41:20,376 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 20:41:20,377 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 20:41:20,377 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 20:41:20,377 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 20:41:20,377 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 20:41:20,377 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 20:41:20,377 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 20:41:20,377 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 20:41:20,378 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 20:41:20,378 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 20:41:20,378 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 20:41:20,378 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 20:41:20,378 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 20:41:20,378 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 20:41:20,379 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 20:41:20,379 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 20:41:20,379 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 20:41:20,379 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 20:41:20,379 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 20:41:20,379 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 20:41:20,379 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 20:41:20,380 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 20:41:20,380 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 20:41:20,380 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 20:41:20,380 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 20:41:20,381 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 20:41:20,381 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 20:41:20,412 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 20:41:20,423 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 20:41:20,426 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 20:41:20,427 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 20:41:20,428 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 20:41:20,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-01-24 20:41:20,606 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 20:41:20,611 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 20:41:20,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 20:41:20,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 20:41:20,617 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 20:41:20,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388a8c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20, skipping insertion in model container [2018-01-24 20:41:20,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,635 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:41:20,682 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 20:41:20,793 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:41:20,819 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 20:41:20,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20 WrapperNode [2018-01-24 20:41:20,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 20:41:20,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 20:41:20,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 20:41:20,831 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 20:41:20,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (1/1) ... [2018-01-24 20:41:20,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 20:41:20,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 20:41:20,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 20:41:20,870 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 20:41:20,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (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 20:41:20,921 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 20:41:20,921 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_kref_init [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init_internal [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure ldv_kobject_create [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure entry_point [2018-01-24 20:41:20,922 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 20:41:20,922 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 20:41:20,922 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 20:41:20,923 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 20:41:20,923 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 20:41:20,923 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 20:41:20,923 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 20:41:20,923 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 20:41:20,923 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-24 20:41:20,923 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-24 20:41:20,924 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-24 20:41:20,924 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 20:41:20,924 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-24 20:41:20,924 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_malloc [2018-01-24 20:41:20,924 INFO L128 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2018-01-24 20:41:20,924 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_kref_init [2018-01-24 20:41:20,925 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_kobject_init_internal [2018-01-24 20:41:20,925 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_kobject_init [2018-01-24 20:41:20,925 INFO L128 BoogieDeclarations]: Found specification of procedure ldv_kobject_create [2018-01-24 20:41:20,925 INFO L128 BoogieDeclarations]: Found specification of procedure entry_point [2018-01-24 20:41:20,925 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 20:41:20,925 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 20:41:20,926 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 20:41:21,063 WARN L455 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-01-24 20:41:21,177 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 20:41:21,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:41:21 BoogieIcfgContainer [2018-01-24 20:41:21,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 20:41:21,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 20:41:21,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 20:41:21,210 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 20:41:21,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 08:41:20" (1/3) ... [2018-01-24 20:41:21,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7760d4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:41:21, skipping insertion in model container [2018-01-24 20:41:21,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 08:41:20" (2/3) ... [2018-01-24 20:41:21,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7760d4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 08:41:21, skipping insertion in model container [2018-01-24 20:41:21,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 08:41:21" (3/3) ... [2018-01-24 20:41:21,214 INFO L105 eAbstractionObserver]: Analyzing ICFG memleaks_test22_2_false-valid-memtrack_true-termination.i [2018-01-24 20:41:21,222 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 20:41:21,228 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-24 20:41:21,271 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 20:41:21,271 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 20:41:21,271 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 20:41:21,271 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 20:41:21,271 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 20:41:21,272 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 20:41:21,272 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 20:41:21,272 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 20:41:21,272 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 20:41:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-24 20:41:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-24 20:41:21,293 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:21,293 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:41:21,294 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash 13572496, now seen corresponding path program 1 times [2018-01-24 20:41:21,299 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:21,344 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:21,344 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:21,344 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:21,344 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:21,401 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:21,520 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 20:41:21,522 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:41:21,522 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:41:21,522 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:41:21,524 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 20:41:21,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 20:41:21,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:41:21,607 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 5 states. [2018-01-24 20:41:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:41:21,668 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2018-01-24 20:41:21,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 20:41:21,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-01-24 20:41:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:41:21,682 INFO L225 Difference]: With dead ends: 118 [2018-01-24 20:41:21,682 INFO L226 Difference]: Without dead ends: 68 [2018-01-24 20:41:21,685 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:41:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-24 20:41:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-01-24 20:41:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-24 20:41:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2018-01-24 20:41:21,721 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 17 [2018-01-24 20:41:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:41:21,722 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2018-01-24 20:41:21,722 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 20:41:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2018-01-24 20:41:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:41:21,723 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:21,723 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 20:41:21,723 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:21,723 INFO L82 PathProgramCache]: Analyzing trace with hash 64872882, now seen corresponding path program 1 times [2018-01-24 20:41:21,724 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:21,725 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:21,725 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:21,726 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:21,726 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:21,748 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:21,827 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 20:41:21,828 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:41:21,828 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 20:41:21,828 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:41:21,830 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:41:21,830 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:41:21,830 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:41:21,831 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 6 states. [2018-01-24 20:41:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:41:21,989 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2018-01-24 20:41:21,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:41:21,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-24 20:41:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:41:21,992 INFO L225 Difference]: With dead ends: 68 [2018-01-24 20:41:21,992 INFO L226 Difference]: Without dead ends: 67 [2018-01-24 20:41:21,996 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:41:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-24 20:41:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2018-01-24 20:41:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-24 20:41:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2018-01-24 20:41:22,009 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 19 [2018-01-24 20:41:22,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:41:22,009 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2018-01-24 20:41:22,009 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:41:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2018-01-24 20:41:22,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-24 20:41:22,010 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:22,010 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 20:41:22,010 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:22,011 INFO L82 PathProgramCache]: Analyzing trace with hash 64872883, now seen corresponding path program 1 times [2018-01-24 20:41:22,011 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:22,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,012 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:22,012 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,013 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:22,034 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:22,294 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 20:41:22,294 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:41:22,294 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:41:22,295 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:41:22,295 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-24 20:41:22,295 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-24 20:41:22,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:41:22,296 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 7 states. [2018-01-24 20:41:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:41:22,513 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-01-24 20:41:22,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-24 20:41:22,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-01-24 20:41:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:41:22,515 INFO L225 Difference]: With dead ends: 67 [2018-01-24 20:41:22,515 INFO L226 Difference]: Without dead ends: 66 [2018-01-24 20:41:22,515 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-01-24 20:41:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-24 20:41:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2018-01-24 20:41:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-01-24 20:41:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2018-01-24 20:41:22,522 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 19 [2018-01-24 20:41:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:41:22,522 INFO L432 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2018-01-24 20:41:22,522 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-24 20:41:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2018-01-24 20:41:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-24 20:41:22,523 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:22,523 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] [2018-01-24 20:41:22,523 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:22,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1610907055, now seen corresponding path program 1 times [2018-01-24 20:41:22,523 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:22,525 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,525 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:22,525 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,525 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:22,538 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:22,589 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 20:41:22,590 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:41:22,590 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 20:41:22,590 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:41:22,590 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 20:41:22,591 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 20:41:22,591 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:41:22,591 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 3 states. [2018-01-24 20:41:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:41:22,640 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2018-01-24 20:41:22,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 20:41:22,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-01-24 20:41:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:41:22,642 INFO L225 Difference]: With dead ends: 71 [2018-01-24 20:41:22,642 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 20:41:22,642 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 20:41:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 20:41:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-24 20:41:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 20:41:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2018-01-24 20:41:22,649 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 22 [2018-01-24 20:41:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:41:22,649 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2018-01-24 20:41:22,649 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 20:41:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2018-01-24 20:41:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-24 20:41:22,650 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:22,650 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] [2018-01-24 20:41:22,650 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash -655458449, now seen corresponding path program 1 times [2018-01-24 20:41:22,650 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:22,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,652 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:22,652 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,652 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:22,664 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:22,699 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 20:41:22,699 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:41:22,699 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 20:41:22,700 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:41:22,700 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 20:41:22,700 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 20:41:22,700 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 20:41:22,700 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 6 states. [2018-01-24 20:41:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:41:22,724 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-01-24 20:41:22,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 20:41:22,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-01-24 20:41:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:41:22,730 INFO L225 Difference]: With dead ends: 67 [2018-01-24 20:41:22,730 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 20:41:22,731 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-01-24 20:41:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 20:41:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-24 20:41:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 20:41:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-01-24 20:41:22,737 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 24 [2018-01-24 20:41:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:41:22,737 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-01-24 20:41:22,737 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 20:41:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-01-24 20:41:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-24 20:41:22,738 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:22,738 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:41:22,738 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:22,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1673666846, now seen corresponding path program 1 times [2018-01-24 20:41:22,739 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:22,740 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,740 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:22,740 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:22,740 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:22,757 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:22,833 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 20:41:22,833 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:41:22,833 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-01-24 20:41:22,833 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:41:22,834 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-24 20:41:22,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-24 20:41:22,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-01-24 20:41:22,834 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2018-01-24 20:41:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:41:23,036 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-01-24 20:41:23,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-24 20:41:23,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-01-24 20:41:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:41:23,038 INFO L225 Difference]: With dead ends: 60 [2018-01-24 20:41:23,038 INFO L226 Difference]: Without dead ends: 59 [2018-01-24 20:41:23,039 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-01-24 20:41:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-24 20:41:23,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-01-24 20:41:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-01-24 20:41:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-01-24 20:41:23,048 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 34 [2018-01-24 20:41:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:41:23,048 INFO L432 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-01-24 20:41:23,048 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-24 20:41:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-01-24 20:41:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-24 20:41:23,050 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:23,050 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:41:23,050 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:23,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1673666845, now seen corresponding path program 1 times [2018-01-24 20:41:23,051 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:23,052 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:23,052 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:23,052 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:23,052 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:23,068 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:23,119 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 20:41:23,119 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 20:41:23,119 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 20:41:23,119 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 20:41:23,120 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 20:41:23,120 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 20:41:23,120 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 20:41:23,120 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 4 states. [2018-01-24 20:41:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 20:41:23,195 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-01-24 20:41:23,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 20:41:23,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2018-01-24 20:41:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 20:41:23,197 INFO L225 Difference]: With dead ends: 97 [2018-01-24 20:41:23,197 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 20:41:23,198 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 20:41:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 20:41:23,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-24 20:41:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 20:41:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-01-24 20:41:23,206 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 34 [2018-01-24 20:41:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 20:41:23,206 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-01-24 20:41:23,206 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 20:41:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-01-24 20:41:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-24 20:41:23,208 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 20:41:23,208 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 20:41:23,208 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ldv_kref_initErr0RequiresViolation, ldv_kref_initErr1RequiresViolation, ldv_kobject_createErr0RequiresViolation, ldv_kobject_createErr1RequiresViolation, mainErr0EnsuresViolation, LDV_INIT_LIST_HEADErr1RequiresViolation, LDV_INIT_LIST_HEADErr3RequiresViolation, LDV_INIT_LIST_HEADErr2RequiresViolation, LDV_INIT_LIST_HEADErr0RequiresViolation]=== [2018-01-24 20:41:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1908152085, now seen corresponding path program 1 times [2018-01-24 20:41:23,208 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 20:41:23,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:23,210 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 20:41:23,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 20:41:23,210 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 20:41:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 20:41:23,227 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 20:41:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 20:41:23,278 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 20:41:23,278 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 20:41:23,279 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-01-24 20:41:23,281 INFO L201 CegarAbsIntRunner]: [0], [3], [5], [7], [11], [15], [19], [20], [24], [26], [27], [39], [42], [43], [44], [46], [47], [52], [55], [56], [60], [64], [68], [72], [73], [74], [75], [76], [78], [80], [82], [83], [84], [86], [88] [2018-01-24 20:41:23,326 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 20:41:23,326 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown