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.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:08:20,972 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:08:20,973 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:08:20,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:08:20,988 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:08:20,989 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:08:20,990 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:08:20,991 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:08:20,993 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:08:20,994 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:08:20,995 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:08:20,995 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:08:20,996 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:08:20,997 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:08:20,998 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:08:21,000 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:08:21,002 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:08:21,004 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:08:21,005 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:08:21,006 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:08:21,009 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:08:21,014 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.epf [2018-01-21 00:08:21,022 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:08:21,022 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:08:21,022 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:08:21,022 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:08:21,023 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:08:21,023 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:08:21,023 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:08:21,023 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:08:21,023 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:08:21,023 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:08:21,023 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:08:21,024 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:08:21,025 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:08:21,025 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:08:21,025 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:08:21,025 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:08:21,025 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:08:21,026 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:08:21,026 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:08:21,026 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:08:21,026 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:08:21,026 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:08:21,026 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:08:21,026 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:08:21,026 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:08:21,027 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:08:21,027 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:08:21,027 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:08:21,027 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:08:21,027 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:08:21,059 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:08:21,070 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:08:21,073 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:08:21,074 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:08:21,075 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:08:21,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:08:21,236 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:08:21,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:08:21,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:08:21,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:08:21,246 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:08:21,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b75990c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21, skipping insertion in model container [2018-01-21 00:08:21,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,262 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:08:21,302 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:08:21,416 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:08:21,438 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:08:21,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21 WrapperNode [2018-01-21 00:08:21,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:08:21,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:08:21,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:08:21,449 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:08:21,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (1/1) ... [2018-01-21 00:08:21,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:08:21,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:08:21,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:08:21,488 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:08:21,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (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 00:08:21,534 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:08:21,534 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:08:21,534 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:08:21,534 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:08:21,534 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:08:21,534 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:08:21,534 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:08:21,535 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:08:21,861 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:08:21,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:08:21 BoogieIcfgContainer [2018-01-21 00:08:21,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:08:21,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:08:21,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:08:21,864 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:08:21,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:08:21" (1/3) ... [2018-01-21 00:08:21,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a55a192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:08:21, skipping insertion in model container [2018-01-21 00:08:21,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:08:21" (2/3) ... [2018-01-21 00:08:21,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a55a192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:08:21, skipping insertion in model container [2018-01-21 00:08:21,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:08:21" (3/3) ... [2018-01-21 00:08:21,868 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:08:21,874 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:08:21,880 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 00:08:21,929 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:08:21,929 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:08:21,929 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:08:21,929 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:08:21,930 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:08:21,930 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:08:21,930 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:08:21,930 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:08:21,931 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:08:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 00:08:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:08:21,958 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:08:21,959 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:08:21,959 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:08:21,964 INFO L82 PathProgramCache]: Analyzing trace with hash 261931, now seen corresponding path program 1 times [2018-01-21 00:08:21,967 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:08:22,030 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,030 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:22,030 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,030 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:08:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:08:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:08:22,087 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:08:22,094 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:08:22,101 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:08:22,101 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:08:22,101 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:08:22,101 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:08:22,102 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:08:22,102 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:08:22,102 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:08:22,102 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:08:22,102 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:08:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 00:08:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 00:08:22,108 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:08:22,108 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 00:08:22,108 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:08:22,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1481030300, now seen corresponding path program 1 times [2018-01-21 00:08:22,109 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:08:22,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,111 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:22,111 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,111 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:08:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:08:22,143 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:08:22,281 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 00:08:22,282 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:08:22,283 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:08:22,283 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:08:22,286 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:08:22,297 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:08:22,298 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:08:22,301 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 00:08:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:08:22,332 INFO L93 Difference]: Finished difference Result 170 states and 228 transitions. [2018-01-21 00:08:22,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:08:22,333 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 00:08:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:08:22,343 INFO L225 Difference]: With dead ends: 170 [2018-01-21 00:08:22,343 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 00:08:22,346 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 00:08:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 00:08:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-01-21 00:08:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-01-21 00:08:22,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2018-01-21 00:08:22,382 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 21 [2018-01-21 00:08:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:08:22,383 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2018-01-21 00:08:22,383 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:08:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2018-01-21 00:08:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 00:08:22,384 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:08:22,384 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:08:22,384 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:08:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1311117136, now seen corresponding path program 1 times [2018-01-21 00:08:22,385 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:08:22,386 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,386 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:22,386 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,386 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:08:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:08:22,404 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:08:22,492 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 00:08:22,492 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:08:22,493 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:08:22,493 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:08:22,494 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:08:22,495 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:08:22,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:08:22,495 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 5 states. [2018-01-21 00:08:22,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:08:22,685 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2018-01-21 00:08:22,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:08:22,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-21 00:08:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:08:22,687 INFO L225 Difference]: With dead ends: 139 [2018-01-21 00:08:22,688 INFO L226 Difference]: Without dead ends: 120 [2018-01-21 00:08:22,689 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:08:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-01-21 00:08:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2018-01-21 00:08:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-21 00:08:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2018-01-21 00:08:22,699 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 30 [2018-01-21 00:08:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:08:22,700 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2018-01-21 00:08:22,700 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:08:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2018-01-21 00:08:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 00:08:22,702 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:08:22,702 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:08:22,702 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:08:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash 491544981, now seen corresponding path program 1 times [2018-01-21 00:08:22,702 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:08:22,704 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,704 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:22,704 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,704 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:08:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:08:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:08:22,763 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:08:22,771 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:08:22,778 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:08:22,778 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:08:22,793 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:08:22,794 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:08:22,794 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:08:22,794 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:08:22,794 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:08:22,794 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:08:22,794 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:08:22,794 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:08:22,794 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:08:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 00:08:22,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 00:08:22,798 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:08:22,798 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 00:08:22,799 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:08:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash 55172353, now seen corresponding path program 1 times [2018-01-21 00:08:22,799 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:08:22,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,801 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:22,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,801 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:08:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:08:22,812 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:08:22,826 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 00:08:22,826 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:08:22,827 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:08:22,827 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:08:22,827 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:08:22,827 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:08:22,827 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:08:22,828 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 00:08:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:08:22,835 INFO L93 Difference]: Finished difference Result 170 states and 228 transitions. [2018-01-21 00:08:22,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:08:22,835 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 00:08:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:08:22,836 INFO L225 Difference]: With dead ends: 170 [2018-01-21 00:08:22,837 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 00:08:22,837 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 00:08:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 00:08:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-21 00:08:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-21 00:08:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2018-01-21 00:08:22,845 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 19 [2018-01-21 00:08:22,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:08:22,845 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2018-01-21 00:08:22,845 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:08:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2018-01-21 00:08:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 00:08:22,847 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:08:22,847 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:08:22,847 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 00:08:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2057227957, now seen corresponding path program 1 times [2018-01-21 00:08:22,847 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:08:22,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,849 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:22,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:22,849 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:08:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:08:22,861 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:08:22,944 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 00:08:22,944 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:08:22,944 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:08:22,944 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:08:22,945 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:08:22,945 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:08:22,945 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:08:22,945 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 5 states. [2018-01-21 00:08:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:08:23,133 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2018-01-21 00:08:23,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:08:23,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-01-21 00:08:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:08:23,135 INFO L225 Difference]: With dead ends: 135 [2018-01-21 00:08:23,135 INFO L226 Difference]: Without dead ends: 118 [2018-01-21 00:08:23,135 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:08:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-01-21 00:08:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2018-01-21 00:08:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-01-21 00:08:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2018-01-21 00:08:23,145 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 28 [2018-01-21 00:08:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:08:23,145 INFO L432 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2018-01-21 00:08:23,145 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:08:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2018-01-21 00:08:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 00:08:23,146 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:08:23,146 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:08:23,147 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 00:08:23,147 INFO L82 PathProgramCache]: Analyzing trace with hash 894365242, now seen corresponding path program 1 times [2018-01-21 00:08:23,147 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:08:23,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:23,148 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:08:23,148 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:08:23,148 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:08:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:08:23,168 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:08:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:08:23,317 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:08:23,351 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:08:23,352 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-01-21 00:08:23,353 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [9], [11], [14], [99], [103], [108], [112], [120], [121], [126], [130], [138], [142], [144], [145], [188], [190], [191], [197], [201], [203], [204], [215], [216], [217], [218], [219], [224], [226], [227], [228], [234], [235], [236] [2018-01-21 00:08:23,415 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:08:23,415 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