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/sll-circular_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 09:09:50,009 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 09:09:50,011 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 09:09:50,024 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 09:09:50,024 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 09:09:50,025 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 09:09:50,026 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 09:09:50,027 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 09:09:50,029 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 09:09:50,029 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 09:09:50,030 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 09:09:50,030 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 09:09:50,031 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 09:09:50,031 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 09:09:50,032 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 09:09:50,035 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 09:09:50,037 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 09:09:50,039 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 09:09:50,040 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 09:09:50,041 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 09:09:50,044 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 09:09:50,049 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 09:09:50,049 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 09:09:50,050 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 09:09:50,060 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 09:09:50,060 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 09:09:50,061 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 09:09:50,061 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 09:09:50,061 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 09:09:50,062 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 09:09:50,062 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 09:09:50,062 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 09:09:50,062 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 09:09:50,063 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 09:09:50,063 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 09:09:50,063 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 09:09:50,063 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 09:09:50,064 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 09:09:50,064 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 09:09:50,064 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 09:09:50,064 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 09:09:50,064 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 09:09:50,065 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 09:09:50,065 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 09:09:50,065 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 09:09:50,065 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 09:09:50,065 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 09:09:50,066 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 09:09:50,066 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 09:09:50,066 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 09:09:50,066 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 09:09:50,066 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 09:09:50,067 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 09:09:50,067 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 09:09:50,067 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 09:09:50,067 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 09:09:50,067 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 09:09:50,068 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 09:09:50,068 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 09:09:50,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 09:09:50,068 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 09:09:50,068 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 09:09:50,069 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 09:09:50,070 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 09:09:50,104 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 09:09:50,113 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 09:09:50,117 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 09:09:50,118 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 09:09:50,118 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 09:09:50,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:09:50,299 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 09:09:50,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 09:09:50,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 09:09:50,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 09:09:50,311 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 09:09:50,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eeba7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50, skipping insertion in model container [2018-01-21 09:09:50,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,333 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:09:50,375 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 09:09:50,498 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:09:50,518 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 09:09:50,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50 WrapperNode [2018-01-21 09:09:50,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 09:09:50,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 09:09:50,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 09:09:50,527 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 09:09:50,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (1/1) ... [2018-01-21 09:09:50,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 09:09:50,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 09:09:50,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 09:09:50,565 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 09:09:50,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (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 09:09:50,618 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 09:09:50,618 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 09:09:50,618 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 09:09:50,618 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 09:09:50,618 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 09:09:50,619 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 09:09:50,619 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 09:09:50,619 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 09:09:50,619 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 09:09:50,619 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 09:09:50,619 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 09:09:50,620 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 09:09:50,620 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 09:09:50,620 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 09:09:50,620 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 09:09:50,620 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 09:09:50,620 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 09:09:50,892 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 09:09:50,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:09:50 BoogieIcfgContainer [2018-01-21 09:09:50,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 09:09:50,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 09:09:50,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 09:09:50,897 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 09:09:50,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 09:09:50" (1/3) ... [2018-01-21 09:09:50,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce05999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:09:50, skipping insertion in model container [2018-01-21 09:09:50,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 09:09:50" (2/3) ... [2018-01-21 09:09:50,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce05999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 09:09:50, skipping insertion in model container [2018-01-21 09:09:50,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 09:09:50" (3/3) ... [2018-01-21 09:09:50,902 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-circular_true-unreach-call_true-valid-memsafety.i [2018-01-21 09:09:50,910 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 09:09:50,918 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 09:09:50,959 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:09:50,959 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:09:50,959 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:09:50,960 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:09:50,960 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:09:50,960 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:09:50,960 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:09:50,960 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 09:09:50,961 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:09:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 09:09:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 09:09:50,985 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:09:50,986 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 09:09:50,986 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 09:09:50,990 INFO L82 PathProgramCache]: Analyzing trace with hash 186463, now seen corresponding path program 1 times [2018-01-21 09:09:50,992 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:09:51,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:51,034 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:09:51,034 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:51,034 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:09:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:09:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 09:09:51,085 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 09:09:51,091 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 09:09:51,099 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 09:09:51,099 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 09:09:51,099 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 09:09:51,099 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 09:09:51,099 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 09:09:51,099 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 09:09:51,100 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 09:09:51,100 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 09:09:51,100 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 09:09:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 09:09:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 09:09:51,105 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:09:51,105 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 09:09:51,106 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:09:51,106 INFO L82 PathProgramCache]: Analyzing trace with hash 128587636, now seen corresponding path program 1 times [2018-01-21 09:09:51,106 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:09:51,107 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:51,108 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:09:51,108 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:51,108 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:09:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:09:51,145 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:09:51,187 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 09:09:51,189 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:09:51,190 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 09:09:51,190 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:09:51,192 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 09:09:51,287 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 09:09:51,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 09:09:51,290 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2018-01-21 09:09:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:09:51,315 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2018-01-21 09:09:51,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 09:09:51,316 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-01-21 09:09:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:09:51,325 INFO L225 Difference]: With dead ends: 119 [2018-01-21 09:09:51,326 INFO L226 Difference]: Without dead ends: 62 [2018-01-21 09:09:51,328 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 09:09:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-21 09:09:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-21 09:09:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-21 09:09:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2018-01-21 09:09:51,362 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 24 [2018-01-21 09:09:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:09:51,362 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2018-01-21 09:09:51,362 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 09:09:51,362 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2018-01-21 09:09:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 09:09:51,364 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:09:51,364 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] [2018-01-21 09:09:51,364 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:09:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash 724775855, now seen corresponding path program 1 times [2018-01-21 09:09:51,364 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:09:51,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:51,366 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:09:51,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:51,366 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:09:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:09:51,401 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:09:52,147 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 09:09:52,170 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:09:52,170 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-01-21 09:09:52,170 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:09:52,172 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 09:09:52,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 09:09:52,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-01-21 09:09:52,173 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 12 states. [2018-01-21 09:09:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:09:52,709 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2018-01-21 09:09:52,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-21 09:09:52,710 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-01-21 09:09:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:09:52,713 INFO L225 Difference]: With dead ends: 128 [2018-01-21 09:09:52,713 INFO L226 Difference]: Without dead ends: 114 [2018-01-21 09:09:52,715 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2018-01-21 09:09:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-21 09:09:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2018-01-21 09:09:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-21 09:09:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-01-21 09:09:52,723 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 32 [2018-01-21 09:09:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:09:52,723 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-01-21 09:09:52,724 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 09:09:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-01-21 09:09:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 09:09:52,725 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:09:52,725 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] [2018-01-21 09:09:52,726 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:09:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1505215911, now seen corresponding path program 1 times [2018-01-21 09:09:52,726 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:09:52,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:52,727 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:09:52,728 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:52,728 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:09:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:09:52,745 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:09:52,778 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 09:09:52,779 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:09:52,779 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 09:09:52,779 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:09:52,780 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 09:09:52,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 09:09:52,780 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 09:09:52,780 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 3 states. [2018-01-21 09:09:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:09:52,816 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-01-21 09:09:52,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 09:09:52,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-01-21 09:09:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:09:52,820 INFO L225 Difference]: With dead ends: 175 [2018-01-21 09:09:52,821 INFO L226 Difference]: Without dead ends: 123 [2018-01-21 09:09:52,821 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 09:09:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-21 09:09:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2018-01-21 09:09:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 09:09:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2018-01-21 09:09:52,834 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 41 [2018-01-21 09:09:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:09:52,834 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2018-01-21 09:09:52,834 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 09:09:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2018-01-21 09:09:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 09:09:52,836 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:09:52,836 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 09:09:52,836 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:09:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash 977083296, now seen corresponding path program 1 times [2018-01-21 09:09:52,837 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:09:52,838 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:52,838 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:09:52,838 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:52,838 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:09:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:09:52,859 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:09:53,339 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 09:09:53,339 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 09:09:53,339 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-01-21 09:09:53,339 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 09:09:53,340 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-21 09:09:53,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-21 09:09:53,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-01-21 09:09:53,340 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 13 states. [2018-01-21 09:09:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 09:09:53,701 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2018-01-21 09:09:53,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 09:09:53,702 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-01-21 09:09:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 09:09:53,703 INFO L225 Difference]: With dead ends: 159 [2018-01-21 09:09:53,703 INFO L226 Difference]: Without dead ends: 129 [2018-01-21 09:09:53,704 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2018-01-21 09:09:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-01-21 09:09:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2018-01-21 09:09:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-21 09:09:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2018-01-21 09:09:53,712 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 44 [2018-01-21 09:09:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 09:09:53,712 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2018-01-21 09:09:53,712 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-21 09:09:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2018-01-21 09:09:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 09:09:53,713 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 09:09:53,713 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] [2018-01-21 09:09:53,713 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 09:09:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1973007188, now seen corresponding path program 1 times [2018-01-21 09:09:53,714 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 09:09:53,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:53,715 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 09:09:53,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 09:09:53,715 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 09:09:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 09:09:53,734 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 09:09:54,179 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 09:09:54,179 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 09:09:54,179 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 09:09:54,180 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-21 09:09:54,182 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [8], [10], [13], [15], [16], [17], [18], [19], [20], [21], [37], [39], [43], [48], [52], [61], [62], [63], [67], [72], [76], [84], [86], [89], [128], [129], [133], [135], [138], [147], [148], [149], [151], [152], [157], [158], [159], [160], [161] [2018-01-21 09:09:54,235 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 09:09:54,235 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