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/list-ext-properties/test-0513_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:14:12,977 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:14:12,979 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:14:12,996 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:14:12,996 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:14:12,997 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:14:12,999 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:14:13,001 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:14:13,003 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:14:13,005 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:14:13,006 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:14:13,006 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:14:13,007 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:14:13,009 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:14:13,010 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:14:13,013 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:14:13,015 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:14:13,017 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:14:13,019 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:14:13,020 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:14:13,022 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:14:13,027 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:14:13,028 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:14:13,028 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 03:14:13,039 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:14:13,039 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:14:13,040 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:14:13,040 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:14:13,040 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:14:13,040 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:14:13,041 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:14:13,041 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:14:13,041 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:14:13,042 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:14:13,042 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:14:13,042 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:14:13,042 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:14:13,043 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:14:13,043 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:14:13,043 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:14:13,043 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:14:13,043 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:14:13,043 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:14:13,044 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:14:13,044 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:14:13,044 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:14:13,044 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:14:13,044 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:14:13,045 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:14:13,045 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:14:13,045 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:14:13,045 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:14:13,046 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:14:13,046 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:14:13,046 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:14:13,046 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:14:13,046 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:14:13,046 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:14:13,047 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:14:13,047 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:14:13,047 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:14:13,047 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:14:13,048 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:14:13,048 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:14:13,084 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:14:13,097 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:14:13,101 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:14:13,103 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:14:13,103 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:14:13,104 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/test-0513_1_true-valid-memsafety.i [2018-01-21 03:14:13,295 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:14:13,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:14:13,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:14:13,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:14:13,311 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:14:13,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d3346b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13, skipping insertion in model container [2018-01-21 03:14:13,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,341 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:14:13,403 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:14:13,555 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:14:13,583 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:14:13,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13 WrapperNode [2018-01-21 03:14:13,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:14:13,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:14:13,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:14:13,596 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:14:13,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (1/1) ... [2018-01-21 03:14:13,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:14:13,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:14:13,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:14:13,649 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:14:13,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (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 03:14:13,717 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:14:13,717 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:14:13,717 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:14:13,717 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:14:13,718 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:14:13,718 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:14:13,718 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:14:13,718 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:14:13,718 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:14:13,718 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:14:13,719 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:14:13,719 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:14:13,719 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-21 03:14:13,719 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:14:13,719 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:14:13,719 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:14:13,720 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:14:14,152 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:14:14,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:14:14 BoogieIcfgContainer [2018-01-21 03:14:14,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:14:14,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:14:14,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:14:14,157 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:14:14,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:14:13" (1/3) ... [2018-01-21 03:14:14,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd2fa72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:14:14, skipping insertion in model container [2018-01-21 03:14:14,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:14:13" (2/3) ... [2018-01-21 03:14:14,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd2fa72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:14:14, skipping insertion in model container [2018-01-21 03:14:14,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:14:14" (3/3) ... [2018-01-21 03:14:14,161 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0513_1_true-valid-memsafety.i [2018-01-21 03:14:14,168 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:14:14,175 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:14:14,233 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:14:14,233 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:14:14,233 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:14:14,233 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:14:14,233 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:14:14,234 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:14:14,234 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:14:14,234 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:14:14,235 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:14:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 03:14:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:14:14,266 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:14,268 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:14:14,268 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:14:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash 217246, now seen corresponding path program 1 times [2018-01-21 03:14:14,277 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:14,340 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,340 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:14,341 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,341 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:14:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:14:14,397 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:14:14,403 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:14:14,411 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:14:14,411 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:14:14,411 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:14:14,412 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:14:14,412 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:14:14,412 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:14:14,412 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:14:14,412 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:14:14,412 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:14:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 03:14:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 03:14:14,417 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:14,417 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:14:14,418 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:14:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash 843511722, now seen corresponding path program 1 times [2018-01-21 03:14:14,418 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:14,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,419 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:14,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,419 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:14,436 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:14,468 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 03:14:14,470 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:14,471 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:14:14,471 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:14,474 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:14:14,490 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:14:14,491 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:14:14,494 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 03:14:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:14,620 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2018-01-21 03:14:14,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:14:14,621 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-01-21 03:14:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:14,630 INFO L225 Difference]: With dead ends: 175 [2018-01-21 03:14:14,631 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 03:14:14,633 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 03:14:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 03:14:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-01-21 03:14:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-01-21 03:14:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2018-01-21 03:14:14,667 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 11 [2018-01-21 03:14:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:14,668 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2018-01-21 03:14:14,668 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:14:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2018-01-21 03:14:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-21 03:14:14,668 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:14,668 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:14:14,668 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:14:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash -578790635, now seen corresponding path program 1 times [2018-01-21 03:14:14,669 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:14,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,670 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:14,670 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,670 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:14:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:14:14,708 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:14:14,712 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:14:14,713 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:14:14,714 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:14:14,722 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:14:14,722 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:14:14,722 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:14:14,722 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:14:14,722 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:14:14,723 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:14:14,723 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:14:14,723 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:14:14,723 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:14:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 03:14:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-21 03:14:14,726 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:14,726 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:14:14,726 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1681322799, now seen corresponding path program 1 times [2018-01-21 03:14:14,726 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:14,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,727 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:14,727 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,727 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:14,734 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:14,744 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 03:14:14,744 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:14,744 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:14:14,744 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:14,744 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:14:14,745 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:14:14,745 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:14:14,745 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 03:14:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:14,752 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2018-01-21 03:14:14,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:14:14,752 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-21 03:14:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:14,753 INFO L225 Difference]: With dead ends: 175 [2018-01-21 03:14:14,753 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 03:14:14,754 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 03:14:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 03:14:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-21 03:14:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-21 03:14:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2018-01-21 03:14:14,760 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 9 [2018-01-21 03:14:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:14,761 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2018-01-21 03:14:14,761 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:14:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2018-01-21 03:14:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 03:14:14,761 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:14,761 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:14:14,761 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:14,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1430768294, now seen corresponding path program 1 times [2018-01-21 03:14:14,762 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:14,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,762 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:14,763 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,763 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:14,771 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:14,808 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 03:14:14,808 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:14,808 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:14:14,809 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:14,809 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:14:14,809 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:14:14,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:14:14,810 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 3 states. [2018-01-21 03:14:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:14,857 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2018-01-21 03:14:14,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:14:14,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-01-21 03:14:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:14,864 INFO L225 Difference]: With dead ends: 111 [2018-01-21 03:14:14,864 INFO L226 Difference]: Without dead ends: 109 [2018-01-21 03:14:14,868 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 03:14:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-21 03:14:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2018-01-21 03:14:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-21 03:14:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2018-01-21 03:14:14,884 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2018-01-21 03:14:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:14,885 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2018-01-21 03:14:14,885 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:14:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2018-01-21 03:14:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 03:14:14,886 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:14,886 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:14:14,886 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1220894246, now seen corresponding path program 1 times [2018-01-21 03:14:14,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:14,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,888 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:14,888 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:14,888 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:14,902 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:14,945 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 03:14:14,945 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:14,946 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 03:14:14,946 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:14,946 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:14:14,946 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:14:14,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:14:14,947 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 3 states. [2018-01-21 03:14:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:14,992 INFO L93 Difference]: Finished difference Result 186 states and 219 transitions. [2018-01-21 03:14:14,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:14:14,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2018-01-21 03:14:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:14,994 INFO L225 Difference]: With dead ends: 186 [2018-01-21 03:14:14,994 INFO L226 Difference]: Without dead ends: 105 [2018-01-21 03:14:14,994 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 03:14:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-01-21 03:14:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2018-01-21 03:14:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-21 03:14:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2018-01-21 03:14:15,001 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 21 [2018-01-21 03:14:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:15,002 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2018-01-21 03:14:15,002 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:14:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2018-01-21 03:14:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 03:14:15,003 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:15,003 INFO L322 BasicCegarLoop]: trace histogram [2, 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] [2018-01-21 03:14:15,003 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:15,004 INFO L82 PathProgramCache]: Analyzing trace with hash 354796251, now seen corresponding path program 1 times [2018-01-21 03:14:15,004 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:15,005 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,005 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:15,005 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,005 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:15,030 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:14:15,079 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:15,079 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:14:15,080 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:15,080 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:14:15,080 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:14:15,080 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:14:15,080 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 5 states. [2018-01-21 03:14:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:15,142 INFO L93 Difference]: Finished difference Result 265 states and 312 transitions. [2018-01-21 03:14:15,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:14:15,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-21 03:14:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:15,144 INFO L225 Difference]: With dead ends: 265 [2018-01-21 03:14:15,144 INFO L226 Difference]: Without dead ends: 182 [2018-01-21 03:14:15,145 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-21 03:14:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-01-21 03:14:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 103. [2018-01-21 03:14:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-21 03:14:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2018-01-21 03:14:15,155 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 30 [2018-01-21 03:14:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:15,155 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2018-01-21 03:14:15,155 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:14:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2018-01-21 03:14:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 03:14:15,156 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:15,156 INFO L322 BasicCegarLoop]: trace histogram [2, 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] [2018-01-21 03:14:15,157 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash -626570212, now seen corresponding path program 1 times [2018-01-21 03:14:15,157 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:15,158 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,158 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:15,158 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,159 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:15,176 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:14:15,249 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:15,249 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:14:15,249 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:15,250 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:14:15,250 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:14:15,250 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:14:15,250 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 5 states. [2018-01-21 03:14:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:15,357 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2018-01-21 03:14:15,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 03:14:15,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2018-01-21 03:14:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:15,360 INFO L225 Difference]: With dead ends: 237 [2018-01-21 03:14:15,360 INFO L226 Difference]: Without dead ends: 157 [2018-01-21 03:14:15,361 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 03:14:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-21 03:14:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2018-01-21 03:14:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-21 03:14:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2018-01-21 03:14:15,371 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 31 [2018-01-21 03:14:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:15,371 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2018-01-21 03:14:15,371 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:14:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2018-01-21 03:14:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-21 03:14:15,373 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:15,373 INFO L322 BasicCegarLoop]: trace histogram [2, 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] [2018-01-21 03:14:15,378 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:15,378 INFO L82 PathProgramCache]: Analyzing trace with hash 85377444, now seen corresponding path program 1 times [2018-01-21 03:14:15,379 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:15,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,380 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:15,380 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,380 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:15,401 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:14:15,449 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:15,449 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 03:14:15,449 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:15,450 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 03:14:15,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 03:14:15,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-21 03:14:15,451 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 4 states. [2018-01-21 03:14:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:15,592 INFO L93 Difference]: Finished difference Result 262 states and 298 transitions. [2018-01-21 03:14:15,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 03:14:15,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2018-01-21 03:14:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:15,595 INFO L225 Difference]: With dead ends: 262 [2018-01-21 03:14:15,595 INFO L226 Difference]: Without dead ends: 175 [2018-01-21 03:14:15,596 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-21 03:14:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-21 03:14:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 104. [2018-01-21 03:14:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-21 03:14:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2018-01-21 03:14:15,631 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 40 [2018-01-21 03:14:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:15,631 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2018-01-21 03:14:15,631 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 03:14:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2018-01-21 03:14:15,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 03:14:15,633 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:15,633 INFO L322 BasicCegarLoop]: trace histogram [2, 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] [2018-01-21 03:14:15,642 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1217411263, now seen corresponding path program 1 times [2018-01-21 03:14:15,643 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:15,644 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,644 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:15,644 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:15,644 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:15,689 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:15,986 WARN L146 SmtUtils]: Spent 141ms on a formula simplification. DAG size of input: 16 DAG size of output 9 [2018-01-21 03:14:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:14:16,245 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:14:16,246 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-21 03:14:16,246 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:14:16,247 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 03:14:16,247 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 03:14:16,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-21 03:14:16,248 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 10 states. [2018-01-21 03:14:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:14:16,790 INFO L93 Difference]: Finished difference Result 168 states and 189 transitions. [2018-01-21 03:14:16,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 03:14:16,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-01-21 03:14:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:14:16,792 INFO L225 Difference]: With dead ends: 168 [2018-01-21 03:14:16,792 INFO L226 Difference]: Without dead ends: 165 [2018-01-21 03:14:16,793 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2018-01-21 03:14:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-01-21 03:14:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 119. [2018-01-21 03:14:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-21 03:14:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2018-01-21 03:14:16,803 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 42 [2018-01-21 03:14:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:14:16,804 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2018-01-21 03:14:16,804 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 03:14:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2018-01-21 03:14:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 03:14:16,806 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:14:16,806 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 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 03:14:16,806 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0EnsuresViolation]=== [2018-01-21 03:14:16,806 INFO L82 PathProgramCache]: Analyzing trace with hash -456231378, now seen corresponding path program 1 times [2018-01-21 03:14:16,806 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:14:16,807 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:16,808 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:14:16,808 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:14:16,808 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:14:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:14:16,845 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:14:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:14:17,721 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:14:17,721 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:14:17,722 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-01-21 03:14:17,724 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [15], [17], [18], [19], [24], [26], [29], [30], [36], [37], [43], [44], [48], [49], [58], [59], [60], [62], [63], [70], [74], [76], [79], [144], [145], [146], [150], [154], [156], [157], [158], [159], [160], [167], [174], [179], [181], [182], [183], [189], [190], [191] [2018-01-21 03:14:17,777 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:14:17,778 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