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/dll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:41:14,180 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:41:14,182 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:41:14,198 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:41:14,199 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:41:14,200 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:41:14,201 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:41:14,203 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:41:14,205 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:41:14,206 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:41:14,207 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:41:14,207 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:41:14,208 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:41:14,209 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:41:14,210 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:41:14,213 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:41:14,215 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:41:14,218 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:41:14,219 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:41:14,220 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:41:14,223 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:41:14,228 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:41:14,228 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:41:14,229 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 03:41:14,239 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:41:14,240 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:41:14,240 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:41:14,241 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:41:14,241 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:41:14,241 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:41:14,241 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:41:14,241 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:41:14,242 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:41:14,242 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:41:14,243 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:41:14,243 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:41:14,243 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:41:14,243 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:41:14,243 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:41:14,244 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:41:14,244 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:41:14,244 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:41:14,244 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:41:14,244 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:41:14,245 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:41:14,245 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:41:14,245 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:41:14,245 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:41:14,245 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:41:14,246 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:41:14,246 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:41:14,246 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:41:14,246 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:41:14,246 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:41:14,247 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:41:14,247 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:41:14,247 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:41:14,247 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:41:14,247 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:41:14,248 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:41:14,248 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:41:14,248 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:41:14,249 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:41:14,249 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:41:14,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:41:14,297 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:41:14,301 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:41:14,302 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:41:14,303 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:41:14,304 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:41:14,658 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:41:14,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:41:14,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:41:14,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:41:14,669 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:41:14,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4b61a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14, skipping insertion in model container [2018-01-21 03:41:14,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,691 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:41:14,734 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:41:14,850 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:41:14,884 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:41:14,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14 WrapperNode [2018-01-21 03:41:14,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:41:14,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:41:14,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:41:14,895 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:41:14,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (1/1) ... [2018-01-21 03:41:14,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:41:14,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:41:14,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:41:14,935 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:41:14,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (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 03:41:14,985 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:41:14,986 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:41:14,986 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:41:14,986 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:41:14,986 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:41:14,986 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:41:14,986 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:41:14,987 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:41:14,987 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:41:14,987 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:41:14,987 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:41:14,987 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:41:14,987 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:41:14,987 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 03:41:14,988 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:41:14,988 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:41:14,988 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:41:15,392 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:41:15,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:41:15 BoogieIcfgContainer [2018-01-21 03:41:15,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:41:15,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:41:15,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:41:15,467 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:41:15,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:41:14" (1/3) ... [2018-01-21 03:41:15,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ace7625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:41:15, skipping insertion in model container [2018-01-21 03:41:15,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:41:14" (2/3) ... [2018-01-21 03:41:15,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ace7625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:41:15, skipping insertion in model container [2018-01-21 03:41:15,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:41:15" (3/3) ... [2018-01-21 03:41:15,471 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:41:15,479 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:41:15,485 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:41:15,540 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:41:15,540 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:41:15,540 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:41:15,540 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:41:15,540 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:41:15,540 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:41:15,541 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:41:15,541 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:41:15,542 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:41:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 03:41:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:41:15,577 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:41:15,578 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:41:15,579 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:41:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash 261931, now seen corresponding path program 1 times [2018-01-21 03:41:15,587 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:41:15,655 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:15,655 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:41:15,655 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:15,655 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:41:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:41:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:41:15,705 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:41:15,713 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:41:15,722 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:41:15,722 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:41:15,722 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:41:15,723 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:41:15,723 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:41:15,723 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:41:15,723 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:41:15,723 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:41:15,723 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:41:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 03:41:15,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 03:41:15,728 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:41:15,729 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:41:15,729 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:41:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1481030300, now seen corresponding path program 1 times [2018-01-21 03:41:15,729 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:41:15,731 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:15,731 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:41:15,731 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:15,732 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:41:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:41:15,765 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:41:15,898 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 03:41:15,900 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:41:15,901 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:41:15,901 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:41:15,904 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:41:15,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:41:15,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:41:15,922 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 03:41:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:41:15,948 INFO L93 Difference]: Finished difference Result 170 states and 228 transitions. [2018-01-21 03:41:15,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:41:15,950 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 03:41:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:41:15,962 INFO L225 Difference]: With dead ends: 170 [2018-01-21 03:41:15,963 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 03:41:15,966 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 03:41:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 03:41:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-01-21 03:41:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-01-21 03:41:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2018-01-21 03:41:16,009 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 21 [2018-01-21 03:41:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:41:16,010 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2018-01-21 03:41:16,010 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:41:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2018-01-21 03:41:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 03:41:16,012 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:41:16,012 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] [2018-01-21 03:41:16,012 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:41:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1311117136, now seen corresponding path program 1 times [2018-01-21 03:41:16,012 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:41:16,014 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,014 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:41:16,014 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,014 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:41:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:41:16,036 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:41:16,144 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 03:41:16,145 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:41:16,145 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:41:16,145 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:41:16,146 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:41:16,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:41:16,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:41:16,147 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 5 states. [2018-01-21 03:41:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:41:16,383 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2018-01-21 03:41:16,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:41:16,383 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-21 03:41:16,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:41:16,386 INFO L225 Difference]: With dead ends: 139 [2018-01-21 03:41:16,386 INFO L226 Difference]: Without dead ends: 120 [2018-01-21 03:41:16,387 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:41:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-01-21 03:41:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2018-01-21 03:41:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-21 03:41:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2018-01-21 03:41:16,398 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 30 [2018-01-21 03:41:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:41:16,398 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2018-01-21 03:41:16,398 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:41:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2018-01-21 03:41:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 03:41:16,400 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:41:16,400 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:41:16,400 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:41:16,401 INFO L82 PathProgramCache]: Analyzing trace with hash 491544981, now seen corresponding path program 1 times [2018-01-21 03:41:16,401 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:41:16,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,403 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:41:16,403 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,403 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:41:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:41:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:41:16,459 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:41:16,467 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:41:16,474 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:41:16,474 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:41:16,489 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:41:16,489 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:41:16,489 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:41:16,489 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:41:16,489 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:41:16,490 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:41:16,490 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:41:16,490 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:41:16,490 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:41:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 03:41:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 03:41:16,493 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:41:16,493 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:41:16,493 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:41:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash 55172353, now seen corresponding path program 1 times [2018-01-21 03:41:16,494 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:41:16,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,496 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:41:16,496 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,496 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:41:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:41:16,507 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:41:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:41:16,521 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:41:16,521 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:41:16,521 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:41:16,521 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:41:16,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:41:16,522 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:41:16,522 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 03:41:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:41:16,529 INFO L93 Difference]: Finished difference Result 170 states and 228 transitions. [2018-01-21 03:41:16,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:41:16,530 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 03:41:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:41:16,531 INFO L225 Difference]: With dead ends: 170 [2018-01-21 03:41:16,531 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 03:41:16,532 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 03:41:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 03:41:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-21 03:41:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-21 03:41:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2018-01-21 03:41:16,540 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 19 [2018-01-21 03:41:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:41:16,540 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2018-01-21 03:41:16,540 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:41:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2018-01-21 03:41:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 03:41:16,542 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:41:16,542 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:41:16,542 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:41:16,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2057227957, now seen corresponding path program 1 times [2018-01-21 03:41:16,542 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:41:16,544 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,544 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:41:16,544 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,544 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:41:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:41:16,558 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:41:16,648 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 03:41:16,649 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:41:16,649 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:41:16,649 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:41:16,649 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:41:16,650 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:41:16,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:41:16,650 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 5 states. [2018-01-21 03:41:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:41:16,785 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2018-01-21 03:41:16,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:41:16,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 03:41:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:41:16,787 INFO L225 Difference]: With dead ends: 135 [2018-01-21 03:41:16,788 INFO L226 Difference]: Without dead ends: 118 [2018-01-21 03:41:16,788 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:41:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-01-21 03:41:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2018-01-21 03:41:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-01-21 03:41:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2018-01-21 03:41:16,796 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 28 [2018-01-21 03:41:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:41:16,797 INFO L432 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2018-01-21 03:41:16,797 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:41:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2018-01-21 03:41:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 03:41:16,798 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:41:16,799 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:41:16,799 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:41:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 894365242, now seen corresponding path program 1 times [2018-01-21 03:41:16,799 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:41:16,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,801 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:41:16,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:41:16,802 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:41:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:41:16,822 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:41:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 03:41:16,974 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:41:16,974 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:41:16,976 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-01-21 03:41:16,978 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [9], [11], [14], [99], [103], [108], [112], [120], [121], [126], [130], [138], [142], [144], [145], [188], [190], [191], [197], [201], [203], [204], [215], [216], [217], [218], [219], [224], [226], [227], [228], [234], [235], [236] [2018-01-21 03:41:17,046 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:41:17,047 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