java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:47:08,936 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:47:08,938 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:47:08,957 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:47:08,957 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:47:08,958 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:47:08,960 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:47:08,961 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:47:08,964 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:47:08,965 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:47:08,966 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:47:08,966 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:47:08,968 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:47:08,970 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:47:08,971 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:47:08,974 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:47:08,976 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:47:08,978 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:47:08,979 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:47:08,981 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:47:08,983 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:47:08,989 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:47:08,989 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:47:08,990 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 03:47:09,002 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:47:09,002 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:47:09,003 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:47:09,003 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:47:09,004 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:47:09,004 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:47:09,004 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:47:09,004 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:47:09,004 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:47:09,005 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:47:09,006 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:47:09,006 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:47:09,006 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:47:09,006 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:47:09,007 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:47:09,007 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:47:09,007 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:47:09,007 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:47:09,007 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:47:09,008 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:47:09,008 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:47:09,008 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:47:09,008 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:47:09,008 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:47:09,009 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:47:09,009 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:47:09,009 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:47:09,009 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:47:09,009 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:47:09,010 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:47:09,010 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:47:09,010 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:47:09,010 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:47:09,010 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:47:09,011 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:47:09,011 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:47:09,011 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:47:09,011 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:47:09,012 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:47:09,012 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:47:09,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:47:09,066 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:47:09,071 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:47:09,073 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:47:09,073 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:47:09,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-sentinel_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:47:09,277 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:47:09,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:47:09,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:47:09,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:47:09,291 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:47:09,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3346b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09, skipping insertion in model container [2018-01-21 03:47:09,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,317 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:47:09,377 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:47:09,504 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:47:09,528 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:47:09,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09 WrapperNode [2018-01-21 03:47:09,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:47:09,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:47:09,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:47:09,538 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:47:09,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... [2018-01-21 03:47:09,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:47:09,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:47:09,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:47:09,582 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:47:09,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:47:09,636 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:47:09,637 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:47:09,637 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:47:09,637 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:47:09,637 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:47:09,637 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:47:09,638 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:47:09,638 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:47:09,638 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:47:09,638 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:47:09,638 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:47:09,638 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:47:09,639 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:47:09,639 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 03:47:09,639 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:47:09,639 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:47:09,639 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:47:10,009 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:47:10,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:47:10 BoogieIcfgContainer [2018-01-21 03:47:10,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:47:10,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:47:10,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:47:10,013 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:47:10,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:47:09" (1/3) ... [2018-01-21 03:47:10,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be64e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:47:10, skipping insertion in model container [2018-01-21 03:47:10,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:47:09" (2/3) ... [2018-01-21 03:47:10,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be64e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:47:10, skipping insertion in model container [2018-01-21 03:47:10,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:47:10" (3/3) ... [2018-01-21 03:47:10,018 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:47:10,027 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:47:10,034 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:47:10,096 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:47:10,096 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:47:10,096 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:47:10,096 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:47:10,096 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:47:10,097 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:47:10,097 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:47:10,097 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:47:10,098 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:47:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2018-01-21 03:47:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:47:10,125 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:47:10,126 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:47:10,126 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:47:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash 207316, now seen corresponding path program 1 times [2018-01-21 03:47:10,132 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:47:10,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:10,181 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:47:10,181 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:10,181 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:47:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:47:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:47:10,234 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:47:10,241 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:47:10,249 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:47:10,249 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:47:10,249 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:47:10,249 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:47:10,250 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:47:10,250 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:47:10,250 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:47:10,250 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:47:10,250 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:47:10,253 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2018-01-21 03:47:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 03:47:10,256 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:47:10,256 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] [2018-01-21 03:47:10,256 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:47:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1129106172, now seen corresponding path program 1 times [2018-01-21 03:47:10,257 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:47:10,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:10,259 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:47:10,259 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:10,259 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:47:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:47:10,299 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:47:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:47:10,356 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:47:10,356 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:47:10,356 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:47:10,438 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:47:10,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:47:10,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:47:10,453 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 2 states. [2018-01-21 03:47:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:47:10,478 INFO L93 Difference]: Finished difference Result 123 states and 160 transitions. [2018-01-21 03:47:10,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:47:10,479 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-21 03:47:10,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:47:10,490 INFO L225 Difference]: With dead ends: 123 [2018-01-21 03:47:10,490 INFO L226 Difference]: Without dead ends: 75 [2018-01-21 03:47:10,492 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:47:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-01-21 03:47:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-01-21 03:47:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-01-21 03:47:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-01-21 03:47:10,526 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 25 [2018-01-21 03:47:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:47:10,526 INFO L432 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-01-21 03:47:10,527 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:47:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-01-21 03:47:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 03:47:10,528 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:47:10,528 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:47:10,529 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:47:10,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1421482513, now seen corresponding path program 1 times [2018-01-21 03:47:10,529 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:47:10,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:10,531 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:47:10,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:10,531 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:47:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:47:10,564 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:47:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:47:10,696 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:47:10,696 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 03:47:10,696 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:47:10,698 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 03:47:10,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 03:47:10,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-01-21 03:47:10,699 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 8 states. [2018-01-21 03:47:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:47:11,028 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2018-01-21 03:47:11,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 03:47:11,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-01-21 03:47:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:47:11,032 INFO L225 Difference]: With dead ends: 133 [2018-01-21 03:47:11,032 INFO L226 Difference]: Without dead ends: 113 [2018-01-21 03:47:11,033 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-01-21 03:47:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-01-21 03:47:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2018-01-21 03:47:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-01-21 03:47:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2018-01-21 03:47:11,041 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 34 [2018-01-21 03:47:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:47:11,042 INFO L432 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2018-01-21 03:47:11,042 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 03:47:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2018-01-21 03:47:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-21 03:47:11,043 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:47:11,043 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:47:11,043 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:47:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1799396031, now seen corresponding path program 1 times [2018-01-21 03:47:11,043 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:47:11,044 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:11,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:47:11,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:47:11,045 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:47:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:47:11,065 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:47:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:47:11,202 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:47:11,357 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:47:11,358 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 41 with the following transitions: [2018-01-21 03:47:11,360 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [6], [7], [8], [12], [14], [17], [43], [47], [52], [56], [64], [65], [70], [74], [82], [86], [88], [89], [132], [134], [135], [141], [145], [168], [169], [170], [172], [173], [178], [179], [180], [181], [182] [2018-01-21 03:47:11,413 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:47:11,413 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