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_preciseopt.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-circular_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 09:04:00,012 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 09:04:00,013 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 09:04:00,028 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 09:04:00,028 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 09:04:00,029 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 09:04:00,030 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 09:04:00,032 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 09:04:00,034 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 09:04:00,034 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 09:04:00,035 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 09:04:00,035 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 09:04:00,036 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 09:04:00,037 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 09:04:00,038 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 09:04:00,041 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 09:04:00,044 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 09:04:00,046 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 09:04:00,047 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 09:04:00,048 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 09:04:00,050 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 09:04:00,055 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 09:04:00,056 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 09:04:00,056 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_preciseopt.epf [2018-01-21 09:04:00,067 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 09:04:00,067 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 09:04:00,068 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 09:04:00,068 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 09:04:00,069 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 09:04:00,069 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 09:04:00,069 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 09:04:00,069 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 09:04:00,069 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 09:04:00,070 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 09:04:00,070 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 09:04:00,071 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 09:04:00,071 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 09:04:00,071 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 09:04:00,071 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 09:04:00,071 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 09:04:00,072 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 09:04:00,072 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 09:04:00,072 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 09:04:00,072 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 09:04:00,072 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 09:04:00,073 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 09:04:00,073 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 09:04:00,073 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 09:04:00,073 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 09:04:00,073 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 09:04:00,074 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 09:04:00,074 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:04:00,074 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 09:04:00,074 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 09:04:00,074 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 09:04:00,075 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 09:04:00,075 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 09:04:00,075 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 09:04:00,075 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 09:04:00,075 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 09:04:00,076 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 09:04:00,076 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 09:04:00,077 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 09:04:00,077 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 09:04:00,114 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 09:04:00,128 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 09:04:00,133 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 09:04:00,135 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 09:04:00,136 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 09:04:00,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:04:00,329 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 09:04:00,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 09:04:00,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 09:04:00,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 09:04:00,340 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 09:04:00,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44478139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00, skipping insertion in model container [2018-01-21 09:04:00,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,360 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:04:00,401 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:04:00,527 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:04:00,549 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:04:00,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00 WrapperNode [2018-01-21 09:04:00,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 09:04:00,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 09:04:00,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 09:04:00,559 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 09:04:00,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (1/1) ... [2018-01-21 09:04:00,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 09:04:00,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 09:04:00,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 09:04:00,602 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 09:04:00,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (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 09:04:00,656 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 09:04:00,656 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 09:04:00,656 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 09:04:00,656 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 09:04:00,656 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 09:04:00,657 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 09:04:00,657 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 09:04:00,657 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 09:04:00,657 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 09:04:00,657 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 09:04:00,657 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 09:04:00,658 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 09:04:00,658 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 09:04:00,658 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 09:04:00,658 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 09:04:00,658 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 09:04:00,658 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 09:04:00,953 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 09:04:00,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:04:00 BoogieIcfgContainer [2018-01-21 09:04:00,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 09:04:00,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 09:04:00,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 09:04:00,958 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 09:04:00,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 09:04:00" (1/3) ... [2018-01-21 09:04:00,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba47c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:04:00, skipping insertion in model container [2018-01-21 09:04:00,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:04:00" (2/3) ... [2018-01-21 09:04:00,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba47c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:04:00, skipping insertion in model container [2018-01-21 09:04:00,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:04:00" (3/3) ... [2018-01-21 09:04:00,963 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-circular_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:04:00,973 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 09:04:00,981 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 09:04:01,031 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:04:01,032 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:04:01,032 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:04:01,032 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:04:01,032 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:04:01,032 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:04:01,032 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:04:01,033 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 09:04:01,034 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:04:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2018-01-21 09:04:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 09:04:01,062 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:04:01,063 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 09:04:01,063 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 09:04:01,067 INFO L82 PathProgramCache]: Analyzing trace with hash 190435, now seen corresponding path program 1 times [2018-01-21 09:04:01,069 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:04:01,111 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:01,111 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:04:01,112 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:01,112 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:04:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:04:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:04:01,170 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:04:01,177 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:04:01,184 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:04:01,185 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:04:01,185 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:04:01,185 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:04:01,185 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:04:01,185 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:04:01,186 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:04:01,186 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 09:04:01,186 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:04:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states. [2018-01-21 09:04:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 09:04:01,191 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:04:01,191 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 09:04:01,192 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:04:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1526713431, now seen corresponding path program 1 times [2018-01-21 09:04:01,192 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:04:01,193 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:01,193 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:04:01,194 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:01,194 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:04:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:04:01,236 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:04:01,287 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 09:04:01,289 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:04:01,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:04:01,289 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:04:01,366 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:04:01,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:04:01,381 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:04:01,383 INFO L87 Difference]: Start difference. First operand 69 states. Second operand 2 states. [2018-01-21 09:04:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:04:01,403 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2018-01-21 09:04:01,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:04:01,404 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-21 09:04:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:04:01,415 INFO L225 Difference]: With dead ends: 126 [2018-01-21 09:04:01,415 INFO L226 Difference]: Without dead ends: 66 [2018-01-21 09:04:01,418 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 09:04:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-21 09:04:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-21 09:04:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-21 09:04:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2018-01-21 09:04:01,451 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 25 [2018-01-21 09:04:01,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:04:01,452 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2018-01-21 09:04:01,452 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:04:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2018-01-21 09:04:01,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 09:04:01,453 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:04:01,453 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] [2018-01-21 09:04:01,453 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:04:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash -97713131, now seen corresponding path program 1 times [2018-01-21 09:04:01,453 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:04:01,454 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:01,454 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:04:01,455 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:01,455 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:04:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:04:01,500 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:04:02,135 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 09:04:02,135 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:04:02,136 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-21 09:04:02,136 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:04:02,138 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 09:04:02,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 09:04:02,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-01-21 09:04:02,139 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 10 states. [2018-01-21 09:04:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:04:02,694 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2018-01-21 09:04:02,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-21 09:04:02,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2018-01-21 09:04:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:04:02,698 INFO L225 Difference]: With dead ends: 132 [2018-01-21 09:04:02,699 INFO L226 Difference]: Without dead ends: 118 [2018-01-21 09:04:02,700 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2018-01-21 09:04:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-01-21 09:04:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 78. [2018-01-21 09:04:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 09:04:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2018-01-21 09:04:02,708 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 33 [2018-01-21 09:04:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:04:02,709 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2018-01-21 09:04:02,709 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 09:04:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2018-01-21 09:04:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-21 09:04:02,710 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:04:02,710 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] [2018-01-21 09:04:02,710 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:04:02,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1309040711, now seen corresponding path program 1 times [2018-01-21 09:04:02,711 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:04:02,711 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:02,712 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:04:02,712 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:02,712 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:04:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:04:02,729 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:04:02,771 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 09:04:02,772 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:04:02,772 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 09:04:02,772 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:04:02,773 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 09:04:02,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 09:04:02,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 09:04:02,774 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 3 states. [2018-01-21 09:04:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:04:02,822 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2018-01-21 09:04:02,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 09:04:02,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-01-21 09:04:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:04:02,826 INFO L225 Difference]: With dead ends: 185 [2018-01-21 09:04:02,826 INFO L226 Difference]: Without dead ends: 130 [2018-01-21 09:04:02,827 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 09:04:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-01-21 09:04:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 96. [2018-01-21 09:04:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 09:04:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2018-01-21 09:04:02,840 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 45 [2018-01-21 09:04:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:04:02,840 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2018-01-21 09:04:02,841 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 09:04:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2018-01-21 09:04:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-01-21 09:04:02,843 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:04:02,843 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] [2018-01-21 09:04:02,843 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:04:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash -403724794, now seen corresponding path program 1 times [2018-01-21 09:04:02,843 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:04:02,844 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:02,845 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:04:02,845 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:02,845 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:04:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:04:02,864 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:04:03,557 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 09:04:03,558 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:04:03,558 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-01-21 09:04:03,558 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:04:03,558 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-21 09:04:03,559 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-21 09:04:03,559 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-01-21 09:04:03,559 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 13 states. [2018-01-21 09:04:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:04:03,889 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2018-01-21 09:04:03,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 09:04:03,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2018-01-21 09:04:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:04:03,891 INFO L225 Difference]: With dead ends: 166 [2018-01-21 09:04:03,891 INFO L226 Difference]: Without dead ends: 136 [2018-01-21 09:04:03,892 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2018-01-21 09:04:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-01-21 09:04:03,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2018-01-21 09:04:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-01-21 09:04:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2018-01-21 09:04:03,901 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 45 [2018-01-21 09:04:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:04:03,902 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2018-01-21 09:04:03,902 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-21 09:04:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2018-01-21 09:04:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-01-21 09:04:03,903 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:04:03,903 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] [2018-01-21 09:04:03,903 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:04:03,903 INFO L82 PathProgramCache]: Analyzing trace with hash 804308226, now seen corresponding path program 1 times [2018-01-21 09:04:03,903 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:04:03,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:03,904 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:04:03,904 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:04:03,904 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:04:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:04:03,924 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:04:04,255 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 09:04:04,255 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 09:04:04,256 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 09:04:04,256 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2018-01-21 09:04:04,258 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [9], [11], [14], [65], [66], [67], [71], [76], [80], [88], [90], [93], [95], [99], [100], [101], [102], [107], [108], [109], [110], [111], [117], [121], [127], [128], [132], [133], [137], [139], [142], [151], [152], [153], [155], [156], [161], [162], [163], [164], [165] [2018-01-21 09:04:04,313 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 09:04:04,313 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