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/memsafety/test-0513_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:00:47,197 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:00:47,201 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:00:47,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:00:47,220 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:00:47,221 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:00:47,223 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:00:47,224 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:00:47,226 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:00:47,226 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:00:47,227 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:00:47,227 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:00:47,228 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:00:47,229 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:00:47,230 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:00:47,233 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:00:47,235 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:00:47,237 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:00:47,239 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:00:47,240 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:00:47,243 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:00:47,248 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:00:47,249 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:00:47,249 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 03:00:47,264 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:00:47,265 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:00:47,266 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:00:47,266 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:00:47,267 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:00:47,267 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:00:47,267 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:00:47,267 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:00:47,268 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:00:47,268 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:00:47,269 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:00:47,269 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:00:47,269 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:00:47,269 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:00:47,269 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:00:47,270 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:00:47,270 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:00:47,270 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:00:47,270 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:00:47,270 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:00:47,270 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:00:47,271 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:00:47,271 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:00:47,271 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:00:47,271 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:00:47,271 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:00:47,272 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:00:47,272 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:00:47,272 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:00:47,272 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:00:47,272 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:00:47,272 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:00:47,273 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:00:47,273 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:00:47,273 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:00:47,273 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:00:47,273 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:00:47,273 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:00:47,275 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:00:47,275 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:00:47,338 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:00:47,353 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:00:47,357 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:00:47,359 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:00:47,360 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:00:47,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0513_true-valid-memsafety.i [2018-01-21 03:00:47,669 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:00:47,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:00:47,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:00:47,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:00:47,679 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:00:47,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ff5ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47, skipping insertion in model container [2018-01-21 03:00:47,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,700 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:00:47,748 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:00:47,911 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:00:47,933 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:00:47,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47 WrapperNode [2018-01-21 03:00:47,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:00:47,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:00:47,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:00:47,944 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:00:47,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (1/1) ... [2018-01-21 03:00:47,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:00:47,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:00:47,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:00:47,993 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:00:47,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (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 03:00:48,046 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:00:48,047 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:00:48,047 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:00:48,047 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:00:48,047 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:00:48,047 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:00:48,047 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:00:48,047 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:00:48,047 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:00:48,048 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:00:48,048 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:00:48,048 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:00:48,048 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-21 03:00:48,048 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:00:48,048 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:00:48,049 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:00:48,049 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:00:48,657 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:00:48,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:00:48 BoogieIcfgContainer [2018-01-21 03:00:48,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:00:48,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:00:48,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:00:48,662 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:00:48,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:00:47" (1/3) ... [2018-01-21 03:00:48,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b620625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:00:48, skipping insertion in model container [2018-01-21 03:00:48,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:00:47" (2/3) ... [2018-01-21 03:00:48,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b620625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:00:48, skipping insertion in model container [2018-01-21 03:00:48,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:00:48" (3/3) ... [2018-01-21 03:00:48,667 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0513_true-valid-memsafety.i [2018-01-21 03:00:48,674 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:00:48,682 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:00:48,734 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:00:48,734 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:00:48,735 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:00:48,735 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:00:48,735 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:00:48,735 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:00:48,735 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:00:48,735 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:00:48,736 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:00:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2018-01-21 03:00:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:00:48,761 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:48,764 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:00:48,765 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:00:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash 177526, now seen corresponding path program 1 times [2018-01-21 03:00:48,771 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:48,815 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:48,815 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:48,815 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:48,815 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:00:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:00:48,883 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:00:48,892 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:00:48,901 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:00:48,901 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:00:48,901 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:00:48,901 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:00:48,901 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:00:48,902 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:00:48,902 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:00:48,902 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:00:48,902 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:00:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2018-01-21 03:00:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 03:00:48,908 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:48,909 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:00:48,909 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:00:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 400164698, now seen corresponding path program 1 times [2018-01-21 03:00:48,909 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:48,911 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:48,912 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:48,912 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:48,912 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:00:48,934 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:00:48,965 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 03:00:48,967 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:00:48,968 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:00:48,968 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:00:48,972 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:00:49,114 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:00:49,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:00:49,119 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 2 states. [2018-01-21 03:00:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:00:49,148 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2018-01-21 03:00:49,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:00:49,149 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-01-21 03:00:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:00:49,164 INFO L225 Difference]: With dead ends: 155 [2018-01-21 03:00:49,164 INFO L226 Difference]: Without dead ends: 78 [2018-01-21 03:00:49,169 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 03:00:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-21 03:00:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-01-21 03:00:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 03:00:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2018-01-21 03:00:49,213 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 11 [2018-01-21 03:00:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:00:49,213 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2018-01-21 03:00:49,213 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:00:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2018-01-21 03:00:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 03:00:49,214 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:49,214 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:00:49,214 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:00:49,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1707388296, now seen corresponding path program 1 times [2018-01-21 03:00:49,214 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:49,215 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,216 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:49,216 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,216 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:00:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:00:49,248 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:00:49,252 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:00:49,254 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:00:49,254 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:00:49,264 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:00:49,264 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:00:49,264 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:00:49,264 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:00:49,265 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:00:49,265 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:00:49,265 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:00:49,265 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:00:49,265 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:00:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2018-01-21 03:00:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-21 03:00:49,271 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:49,271 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:00:49,271 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:00:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1944548319, now seen corresponding path program 1 times [2018-01-21 03:00:49,272 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:49,276 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,276 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:49,276 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,276 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:00:49,285 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:00:49,296 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 03:00:49,296 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:00:49,296 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:00:49,296 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:00:49,297 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:00:49,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:00:49,297 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:00:49,297 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 2 states. [2018-01-21 03:00:49,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:00:49,308 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2018-01-21 03:00:49,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:00:49,309 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-21 03:00:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:00:49,310 INFO L225 Difference]: With dead ends: 155 [2018-01-21 03:00:49,310 INFO L226 Difference]: Without dead ends: 76 [2018-01-21 03:00:49,311 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 03:00:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-21 03:00:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-21 03:00:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 03:00:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2018-01-21 03:00:49,320 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 9 [2018-01-21 03:00:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:00:49,320 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2018-01-21 03:00:49,321 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:00:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2018-01-21 03:00:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 03:00:49,321 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:49,322 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:00:49,322 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:00:49,322 INFO L82 PathProgramCache]: Analyzing trace with hash 364703357, now seen corresponding path program 1 times [2018-01-21 03:00:49,322 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:49,323 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,324 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:49,324 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,324 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:00:49,332 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:00:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:00:49,368 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:00:49,368 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:00:49,368 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:00:49,368 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:00:49,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:00:49,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:00:49,369 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 3 states. [2018-01-21 03:00:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:00:49,415 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2018-01-21 03:00:49,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:00:49,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-21 03:00:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:00:49,418 INFO L225 Difference]: With dead ends: 100 [2018-01-21 03:00:49,418 INFO L226 Difference]: Without dead ends: 98 [2018-01-21 03:00:49,419 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 03:00:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-01-21 03:00:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2018-01-21 03:00:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-01-21 03:00:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2018-01-21 03:00:49,428 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 11 [2018-01-21 03:00:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:00:49,429 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2018-01-21 03:00:49,429 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:00:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2018-01-21 03:00:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 03:00:49,430 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:49,430 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] [2018-01-21 03:00:49,430 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:00:49,430 INFO L82 PathProgramCache]: Analyzing trace with hash -63678405, now seen corresponding path program 1 times [2018-01-21 03:00:49,431 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:49,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,432 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:49,432 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,432 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:00:49,442 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:00:49,480 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 03:00:49,480 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:00:49,480 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 03:00:49,481 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:00:49,481 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:00:49,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:00:49,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:00:49,482 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 3 states. [2018-01-21 03:00:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:00:49,521 INFO L93 Difference]: Finished difference Result 162 states and 179 transitions. [2018-01-21 03:00:49,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:00:49,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-01-21 03:00:49,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:00:49,522 INFO L225 Difference]: With dead ends: 162 [2018-01-21 03:00:49,522 INFO L226 Difference]: Without dead ends: 91 [2018-01-21 03:00:49,523 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 03:00:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-21 03:00:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2018-01-21 03:00:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 03:00:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2018-01-21 03:00:49,529 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 20 [2018-01-21 03:00:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:00:49,530 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2018-01-21 03:00:49,530 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:00:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2018-01-21 03:00:49,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 03:00:49,530 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:49,531 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] [2018-01-21 03:00:49,531 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 03:00:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1819825368, now seen corresponding path program 1 times [2018-01-21 03:00:49,531 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:49,532 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,532 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:49,532 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,532 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:00:49,560 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:00:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:00:49,638 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:00:49,638 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:00:49,639 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:00:49,639 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:00:49,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:00:49,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:00:49,640 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 5 states. [2018-01-21 03:00:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:00:49,872 INFO L93 Difference]: Finished difference Result 207 states and 228 transitions. [2018-01-21 03:00:49,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 03:00:49,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 03:00:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:00:49,874 INFO L225 Difference]: With dead ends: 207 [2018-01-21 03:00:49,874 INFO L226 Difference]: Without dead ends: 137 [2018-01-21 03:00:49,875 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 03:00:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-01-21 03:00:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 89. [2018-01-21 03:00:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 03:00:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2018-01-21 03:00:49,889 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 28 [2018-01-21 03:00:49,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:00:49,890 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2018-01-21 03:00:49,890 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:00:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2018-01-21 03:00:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 03:00:49,891 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:49,891 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] [2018-01-21 03:00:49,892 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0EnsuresViolation]=== [2018-01-21 03:00:49,892 INFO L82 PathProgramCache]: Analyzing trace with hash 554100800, now seen corresponding path program 1 times [2018-01-21 03:00:49,892 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:49,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,893 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:49,893 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:49,893 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:00:49,917 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:00:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:00:50,364 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:00:50,364 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-21 03:00:50,365 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:00:50,365 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 03:00:50,365 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 03:00:50,365 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-21 03:00:50,366 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 10 states. [2018-01-21 03:00:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:00:50,806 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2018-01-21 03:00:50,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 03:00:50,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-01-21 03:00:50,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:00:50,808 INFO L225 Difference]: With dead ends: 146 [2018-01-21 03:00:50,810 INFO L226 Difference]: Without dead ends: 143 [2018-01-21 03:00:50,811 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2018-01-21 03:00:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-01-21 03:00:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2018-01-21 03:00:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-21 03:00:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2018-01-21 03:00:50,823 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 37 [2018-01-21 03:00:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:00:50,823 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2018-01-21 03:00:50,823 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 03:00:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2018-01-21 03:00:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 03:00:50,825 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:00:50,825 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 03:00:50,825 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0EnsuresViolation]=== [2018-01-21 03:00:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1918168780, now seen corresponding path program 1 times [2018-01-21 03:00:50,826 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:00:50,826 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:50,827 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:00:50,827 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:00:50,827 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:00:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:00:50,852 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:00:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:00:51,492 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:00:51,492 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:00:51,493 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-01-21 03:00:51,495 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [12], [13], [18], [20], [21], [22], [23], [24], [25], [34], [35], [36], [38], [39], [46], [50], [52], [55], [120], [121], [122], [126], [130], [132], [133], [134], [135], [139], [141], [142], [143], [149], [150], [151] [2018-01-21 03:00:51,551 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:00:51,552 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