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-token_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:43:34,941 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:43:34,943 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:43:34,959 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:43:34,960 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:43:34,961 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:43:34,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:43:34,964 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:43:34,966 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:43:34,967 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:43:34,968 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:43:34,968 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:43:34,969 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:43:34,970 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:43:34,971 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:43:34,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:43:34,975 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:43:34,978 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:43:34,979 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:43:34,980 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:43:34,983 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:43:34,987 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:43:34,988 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:43:34,988 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 03:43:35,021 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:43:35,021 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:43:35,022 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:43:35,022 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:43:35,022 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:43:35,022 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:43:35,022 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:43:35,023 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:43:35,023 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:43:35,023 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:43:35,023 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:43:35,024 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:43:35,024 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:43:35,024 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:43:35,024 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:43:35,024 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:43:35,024 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:43:35,025 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:43:35,025 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:43:35,025 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:43:35,025 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:43:35,025 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:43:35,025 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:43:35,026 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:43:35,026 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:43:35,026 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:43:35,026 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:43:35,026 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:43:35,026 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:43:35,026 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:43:35,027 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:43:35,028 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:43:35,028 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:43:35,060 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:43:35,099 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:43:35,106 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:43:35,107 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:43:35,108 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:43:35,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-token_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:43:35,298 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:43:35,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:43:35,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:43:35,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:43:35,307 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:43:35,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27608974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35, skipping insertion in model container [2018-01-21 03:43:35,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,324 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:43:35,364 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:43:35,489 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:43:35,512 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:43:35,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35 WrapperNode [2018-01-21 03:43:35,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:43:35,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:43:35,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:43:35,524 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:43:35,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (1/1) ... [2018-01-21 03:43:35,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:43:35,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:43:35,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:43:35,568 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:43:35,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (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 03:43:35,640 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:43:35,641 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:43:35,641 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:43:35,641 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:43:35,642 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:43:35,642 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:43:35,642 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 03:43:35,642 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:43:35,642 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:43:35,642 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:43:35,953 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:43:35,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:43:35 BoogieIcfgContainer [2018-01-21 03:43:35,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:43:35,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:43:35,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:43:35,958 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:43:35,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:43:35" (1/3) ... [2018-01-21 03:43:35,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ceaf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:43:35, skipping insertion in model container [2018-01-21 03:43:35,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:43:35" (2/3) ... [2018-01-21 03:43:35,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ceaf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:43:35, skipping insertion in model container [2018-01-21 03:43:35,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:43:35" (3/3) ... [2018-01-21 03:43:35,962 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-token_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:43:35,971 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:43:35,978 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:43:36,026 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:43:36,026 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:43:36,026 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:43:36,027 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:43:36,027 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:43:36,027 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:43:36,027 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:43:36,027 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:43:36,028 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:43:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-01-21 03:43:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:43:36,055 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:43:36,056 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:43:36,057 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:43:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash 224197, now seen corresponding path program 1 times [2018-01-21 03:43:36,064 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:43:36,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,113 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:43:36,113 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,113 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:43:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:43:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:43:36,172 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:43:36,178 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:43:36,184 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:43:36,184 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:43:36,185 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:43:36,185 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:43:36,185 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:43:36,185 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:43:36,185 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:43:36,185 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:43:36,185 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:43:36,188 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-01-21 03:43:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 03:43:36,191 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:43:36,192 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, 1, 1, 1] [2018-01-21 03:43:36,192 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:43:36,192 INFO L82 PathProgramCache]: Analyzing trace with hash 423085407, now seen corresponding path program 1 times [2018-01-21 03:43:36,193 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:43:36,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,194 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:43:36,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,195 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:43:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:43:36,229 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:43:36,368 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 03:43:36,370 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:43:36,370 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:43:36,370 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:43:36,373 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:43:36,388 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:43:36,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:43:36,392 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 2 states. [2018-01-21 03:43:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:43:36,423 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2018-01-21 03:43:36,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:43:36,425 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2018-01-21 03:43:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:43:36,437 INFO L225 Difference]: With dead ends: 146 [2018-01-21 03:43:36,438 INFO L226 Difference]: Without dead ends: 76 [2018-01-21 03:43:36,441 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 03:43:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-21 03:43:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-21 03:43:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 03:43:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-01-21 03:43:36,477 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 38 [2018-01-21 03:43:36,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:43:36,478 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-01-21 03:43:36,478 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:43:36,478 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-01-21 03:43:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-21 03:43:36,480 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:43:36,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:43:36,480 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:43:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash -368729644, now seen corresponding path program 1 times [2018-01-21 03:43:36,480 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:43:36,481 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,481 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:43:36,481 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,482 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:43:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:43:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:43:36,613 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:43:36,626 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:43:36,637 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:43:36,637 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:43:36,654 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:43:36,654 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:43:36,654 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:43:36,655 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:43:36,655 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:43:36,655 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:43:36,655 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:43:36,655 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:43:36,655 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:43:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2018-01-21 03:43:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 03:43:36,660 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:43:36,660 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, 1] [2018-01-21 03:43:36,660 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:43:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1456541372, now seen corresponding path program 1 times [2018-01-21 03:43:36,660 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:43:36,662 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,662 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:43:36,662 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,662 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:43:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:43:36,676 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:43:36,692 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 03:43:36,693 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:43:36,693 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:43:36,693 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:43:36,694 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:43:36,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:43:36,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:43:36,694 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 2 states. [2018-01-21 03:43:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:43:36,703 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2018-01-21 03:43:36,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:43:36,704 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 36 [2018-01-21 03:43:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:43:36,705 INFO L225 Difference]: With dead ends: 146 [2018-01-21 03:43:36,705 INFO L226 Difference]: Without dead ends: 74 [2018-01-21 03:43:36,706 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 03:43:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-01-21 03:43:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-01-21 03:43:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-21 03:43:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-01-21 03:43:36,714 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 36 [2018-01-21 03:43:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:43:36,715 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-01-21 03:43:36,715 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:43:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-01-21 03:43:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-01-21 03:43:36,717 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:43:36,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:43:36,717 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:43:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash 759391993, now seen corresponding path program 1 times [2018-01-21 03:43:36,717 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:43:36,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,718 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:43:36,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:36,718 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:43:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:43:36,755 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:43:37,327 WARN L146 SmtUtils]: Spent 103ms on a formula simplification. DAG size of input: 29 DAG size of output 17 [2018-01-21 03:43:37,842 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 03:43:37,842 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:43:37,842 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2018-01-21 03:43:37,842 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:43:37,843 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-21 03:43:37,843 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-21 03:43:37,843 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-01-21 03:43:37,843 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 15 states. [2018-01-21 03:43:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:43:38,439 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2018-01-21 03:43:38,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-21 03:43:38,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2018-01-21 03:43:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:43:38,441 INFO L225 Difference]: With dead ends: 151 [2018-01-21 03:43:38,441 INFO L226 Difference]: Without dead ends: 140 [2018-01-21 03:43:38,443 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2018-01-21 03:43:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-01-21 03:43:38,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2018-01-21 03:43:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-01-21 03:43:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2018-01-21 03:43:38,457 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 53 [2018-01-21 03:43:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:43:38,457 INFO L432 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2018-01-21 03:43:38,458 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-21 03:43:38,458 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2018-01-21 03:43:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-01-21 03:43:38,459 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:43:38,460 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:43:38,460 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:43:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1658141493, now seen corresponding path program 1 times [2018-01-21 03:43:38,460 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:43:38,461 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:38,462 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:43:38,462 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:38,462 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:43:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:43:38,498 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:43:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:43:38,639 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:43:38,639 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-21 03:43:38,639 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:43:38,640 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-01-21 03:43:38,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-01-21 03:43:38,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-01-21 03:43:38,641 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 8 states. [2018-01-21 03:43:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:43:38,863 INFO L93 Difference]: Finished difference Result 207 states and 213 transitions. [2018-01-21 03:43:38,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 03:43:38,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2018-01-21 03:43:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:43:38,865 INFO L225 Difference]: With dead ends: 207 [2018-01-21 03:43:38,866 INFO L226 Difference]: Without dead ends: 176 [2018-01-21 03:43:38,866 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-01-21 03:43:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-01-21 03:43:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2018-01-21 03:43:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-01-21 03:43:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2018-01-21 03:43:38,880 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 59 [2018-01-21 03:43:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:43:38,881 INFO L432 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2018-01-21 03:43:38,881 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-01-21 03:43:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2018-01-21 03:43:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-01-21 03:43:38,883 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:43:38,883 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:43:38,884 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 03:43:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1697787449, now seen corresponding path program 1 times [2018-01-21 03:43:38,884 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:43:38,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:38,885 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:43:38,885 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:43:38,885 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:43:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:43:38,920 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:43:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:43:39,828 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:43:39,828 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:43:39,829 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 68 with the following transitions: [2018-01-21 03:43:39,830 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [9], [11], [14], [16], [17], [18], [19], [20], [21], [22], [23], [24], [28], [33], [37], [46], [47], [48], [49], [50], [51], [52], [53], [54], [58], [63], [67], [75], [77], [80], [109], [110], [115], [119], [125], [126], [130], [131], [136], [140], [146], [150], [152], [155], [166], [167], [172], [176], [182], [183], [184], [185], [186], [188], [189], [190], [196], [197], [198] [2018-01-21 03:43:39,874 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:43:39,874 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