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_precise.epf -i ../../../trunk/examples/svcomp/memsafety-ext/dll_extends_pointer_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:46:00,058 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:46:00,061 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:46:00,074 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:46:00,074 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:46:00,075 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:46:00,077 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:46:00,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:46:00,081 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:46:00,082 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:46:00,083 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:46:00,083 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:46:00,084 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:46:00,085 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:46:00,086 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:46:00,089 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:46:00,091 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:46:00,093 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:46:00,095 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:46:00,096 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:46:00,099 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:46:00,104 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:46:00,105 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:46:00,105 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_precise.epf [2018-01-21 05:46:00,115 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:46:00,115 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:46:00,116 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:46:00,116 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:46:00,117 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:46:00,117 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:46:00,117 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:46:00,117 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:46:00,118 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:46:00,118 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:46:00,118 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:46:00,118 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:46:00,119 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:46:00,119 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:46:00,119 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:46:00,119 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:46:00,119 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:46:00,120 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:46:00,120 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:46:00,120 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:46:00,120 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:46:00,120 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:46:00,120 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:46:00,121 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:46:00,121 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:46:00,121 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:46:00,121 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:46:00,121 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:46:00,122 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:46:00,122 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:46:00,122 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:46:00,122 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:46:00,122 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:46:00,123 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:46:00,123 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:46:00,123 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:46:00,123 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:46:00,124 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:46:00,124 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:46:00,161 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:46:00,175 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:46:00,179 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:46:00,181 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:46:00,181 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:46:00,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/dll_extends_pointer_true-valid-memsafety.i [2018-01-21 05:46:00,448 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:46:00,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:46:00,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:46:00,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:46:00,459 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:46:00,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79924daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00, skipping insertion in model container [2018-01-21 05:46:00,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,484 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:46:00,526 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:46:00,642 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:46:00,659 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:46:00,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00 WrapperNode [2018-01-21 05:46:00,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:46:00,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:46:00,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:46:00,668 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:46:00,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... [2018-01-21 05:46:00,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:46:00,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:46:00,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:46:00,707 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:46:00,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:46:00,763 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:46:00,763 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:46:00,763 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:46:00,763 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 05:46:00,763 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 05:46:00,763 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:46:00,764 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:46:00,965 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:46:00,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:46:00 BoogieIcfgContainer [2018-01-21 05:46:00,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:46:00,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:46:00,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:46:00,968 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:46:00,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:46:00" (1/3) ... [2018-01-21 05:46:00,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbd44b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:46:00, skipping insertion in model container [2018-01-21 05:46:00,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:46:00" (2/3) ... [2018-01-21 05:46:00,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbd44b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:46:00, skipping insertion in model container [2018-01-21 05:46:00,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:46:00" (3/3) ... [2018-01-21 05:46:00,971 INFO L105 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer_true-valid-memsafety.i [2018-01-21 05:46:00,978 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:46:00,984 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 05:46:01,029 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:46:01,030 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:46:01,030 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:46:01,030 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:46:01,030 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:46:01,030 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:46:01,030 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:46:01,030 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:46:01,031 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:46:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 05:46:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:46:01,058 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:46:01,059 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:46:01,059 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:46:01,063 INFO L82 PathProgramCache]: Analyzing trace with hash 98024, now seen corresponding path program 1 times [2018-01-21 05:46:01,065 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:46:01,106 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,106 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:46:01,107 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,107 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:46:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:46:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:46:01,159 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:46:01,166 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:46:01,174 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:46:01,174 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:46:01,174 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:46:01,174 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:46:01,174 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:46:01,174 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:46:01,175 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:46:01,175 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:46:01,175 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:46:01,176 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 05:46:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 05:46:01,177 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:46:01,177 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:46:01,177 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:46:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1566967016, now seen corresponding path program 1 times [2018-01-21 05:46:01,178 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:46:01,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,179 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:46:01,179 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,179 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:46:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:46:01,208 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:46:01,244 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 05:46:01,245 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:46:01,246 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:46:01,246 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:46:01,248 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:46:01,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:46:01,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:46:01,265 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 05:46:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:46:01,373 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 05:46:01,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:46:01,374 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 05:46:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:46:01,383 INFO L225 Difference]: With dead ends: 60 [2018-01-21 05:46:01,383 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 05:46:01,386 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 05:46:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 05:46:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-01-21 05:46:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-01-21 05:46:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-01-21 05:46:01,416 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 18 [2018-01-21 05:46:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:46:01,416 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-01-21 05:46:01,416 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:46:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-01-21 05:46:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 05:46:01,417 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:46:01,417 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 05:46:01,417 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:46:01,418 INFO L82 PathProgramCache]: Analyzing trace with hash 2022925235, now seen corresponding path program 1 times [2018-01-21 05:46:01,418 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:46:01,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,419 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:46:01,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,419 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:46:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:46:01,440 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:46:01,515 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 05:46:01,515 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:46:01,515 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:46:01,515 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:46:01,517 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:46:01,517 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:46:01,518 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:46:01,518 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 5 states. [2018-01-21 05:46:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:46:01,700 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2018-01-21 05:46:01,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 05:46:01,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-01-21 05:46:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:46:01,705 INFO L225 Difference]: With dead ends: 73 [2018-01-21 05:46:01,705 INFO L226 Difference]: Without dead ends: 68 [2018-01-21 05:46:01,706 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 05:46:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-21 05:46:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2018-01-21 05:46:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-01-21 05:46:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-01-21 05:46:01,713 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 21 [2018-01-21 05:46:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:46:01,714 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-01-21 05:46:01,714 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:46:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-01-21 05:46:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:46:01,715 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:46:01,715 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-21 05:46:01,716 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:46:01,716 INFO L82 PathProgramCache]: Analyzing trace with hash 745482112, now seen corresponding path program 1 times [2018-01-21 05:46:01,716 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:46:01,717 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,717 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:46:01,717 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,718 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:46:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:46:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:46:01,763 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:46:01,769 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:46:01,773 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:46:01,774 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:46:01,786 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:46:01,786 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:46:01,786 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:46:01,786 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:46:01,786 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:46:01,786 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:46:01,786 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:46:01,786 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:46:01,787 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:46:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-01-21 05:46:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-21 05:46:01,789 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:46:01,789 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:46:01,790 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:46:01,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1567082781, now seen corresponding path program 1 times [2018-01-21 05:46:01,790 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:46:01,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,791 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:46:01,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,791 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:46:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:46:01,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:46:01,816 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 05:46:01,816 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:46:01,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:46:01,817 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:46:01,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:46:01,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:46:01,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:46:01,817 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-01-21 05:46:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:46:01,820 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 05:46:01,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:46:01,820 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2018-01-21 05:46:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:46:01,821 INFO L225 Difference]: With dead ends: 60 [2018-01-21 05:46:01,821 INFO L226 Difference]: Without dead ends: 38 [2018-01-21 05:46:01,821 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 05:46:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-21 05:46:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-01-21 05:46:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-01-21 05:46:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2018-01-21 05:46:01,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 16 [2018-01-21 05:46:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:46:01,827 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2018-01-21 05:46:01,827 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:46:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2018-01-21 05:46:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 05:46:01,828 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:46:01,828 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:46:01,828 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:46:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1749589112, now seen corresponding path program 1 times [2018-01-21 05:46:01,829 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:46:01,830 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,830 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:46:01,830 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:01,830 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:46:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:46:01,842 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:46:01,909 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 05:46:01,910 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:46:01,910 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:46:01,910 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:46:01,910 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:46:01,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:46:01,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:46:01,911 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 5 states. [2018-01-21 05:46:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:46:02,000 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2018-01-21 05:46:02,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 05:46:02,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-01-21 05:46:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:46:02,005 INFO L225 Difference]: With dead ends: 69 [2018-01-21 05:46:02,005 INFO L226 Difference]: Without dead ends: 66 [2018-01-21 05:46:02,005 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 05:46:02,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-21 05:46:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2018-01-21 05:46:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 05:46:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2018-01-21 05:46:02,012 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2018-01-21 05:46:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:46:02,012 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2018-01-21 05:46:02,012 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:46:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2018-01-21 05:46:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 05:46:02,013 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:46:02,013 INFO L322 BasicCegarLoop]: trace histogram [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 05:46:02,013 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:46:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1944907653, now seen corresponding path program 1 times [2018-01-21 05:46:02,014 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:46:02,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:02,015 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:46:02,015 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:46:02,015 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:46:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:46:02,033 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:46:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:46:02,217 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:46:02,218 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:46:02,219 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-01-21 05:46:02,221 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [11], [12], [13], [17], [19], [22], [45], [49], [51], [52], [53], [54], [62], [64], [68], [70], [71], [72], [73] [2018-01-21 05:46:02,277 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:46:02,277 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