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/list-ext-properties/test-0513_1_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:57:55,984 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:57:55,986 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:57:56,001 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:57:56,001 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:57:56,002 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:57:56,003 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:57:56,004 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:57:56,007 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:57:56,008 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:57:56,008 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:57:56,008 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:57:56,009 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:57:56,010 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:57:56,011 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:57:56,013 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:57:56,016 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:57:56,018 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:57:56,019 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:57:56,020 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:57:56,022 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:57:56,027 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:57:56,028 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:57:56,028 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-21 05:57:56,039 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:57:56,039 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:57:56,040 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:57:56,040 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:57:56,040 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:57:56,040 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:57:56,041 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:57:56,041 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:57:56,041 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:57:56,042 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:57:56,042 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:57:56,042 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:57:56,042 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:57:56,042 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:57:56,043 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:57:56,043 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:57:56,043 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:57:56,043 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:57:56,043 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:57:56,044 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:57:56,044 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:57:56,044 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:57:56,044 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:57:56,044 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:57:56,045 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:57:56,045 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:57:56,045 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:57:56,045 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:57:56,045 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:57:56,046 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:57:56,046 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:57:56,046 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:57:56,046 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:57:56,046 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:57:56,047 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:57:56,047 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:57:56,047 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:57:56,048 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:57:56,048 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:57:56,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:57:56,095 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:57:56,099 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:57:56,101 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:57:56,101 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:57:56,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext-properties/test-0513_1_true-valid-memsafety.i [2018-01-21 05:57:56,287 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:57:56,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:57:56,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:57:56,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:57:56,302 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:57:56,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41741684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56, skipping insertion in model container [2018-01-21 05:57:56,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,326 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:57:56,367 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:57:56,484 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:57:56,506 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:57:56,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56 WrapperNode [2018-01-21 05:57:56,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:57:56,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:57:56,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:57:56,516 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:57:56,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (1/1) ... [2018-01-21 05:57:56,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:57:56,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:57:56,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:57:56,555 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:57:56,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (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 05:57:56,601 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:57:56,602 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:57:56,602 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:57:56,602 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:57:56,602 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:57:56,602 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 05:57:56,602 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 05:57:56,602 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:57:56,602 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:57:56,602 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:57:56,603 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 05:57:56,603 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 05:57:56,603 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-21 05:57:56,603 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:57:56,603 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:57:56,603 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:57:56,603 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:57:57,002 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:57:57,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:57:57 BoogieIcfgContainer [2018-01-21 05:57:57,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:57:57,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:57:57,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:57:57,034 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:57:57,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:57:56" (1/3) ... [2018-01-21 05:57:57,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532eec50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:57:57, skipping insertion in model container [2018-01-21 05:57:57,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:57:56" (2/3) ... [2018-01-21 05:57:57,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532eec50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:57:57, skipping insertion in model container [2018-01-21 05:57:57,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:57:57" (3/3) ... [2018-01-21 05:57:57,038 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0513_1_true-valid-memsafety.i [2018-01-21 05:57:57,045 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:57:57,052 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 05:57:57,102 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:57:57,102 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:57:57,103 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:57:57,103 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:57:57,103 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:57:57,103 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:57:57,103 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:57:57,103 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:57:57,104 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:57:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 05:57:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:57:57,132 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,133 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:57:57,133 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:57:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash 217246, now seen corresponding path program 1 times [2018-01-21 05:57:57,139 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,184 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,184 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,184 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:57:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:57:57,242 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:57:57,248 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:57:57,254 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:57:57,255 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:57:57,255 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:57:57,255 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:57:57,255 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:57:57,255 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:57:57,255 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:57:57,255 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:57:57,255 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:57:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 05:57:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 05:57:57,259 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,259 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:57,259 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:57:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 843511722, now seen corresponding path program 1 times [2018-01-21 05:57:57,260 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,261 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,262 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:57,279 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:57,311 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 05:57:57,313 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:57,313 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:57:57,313 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:57,316 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:57:57,332 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:57:57,333 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:57:57,336 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 05:57:57,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:57,446 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2018-01-21 05:57:57,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:57:57,447 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-01-21 05:57:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:57,456 INFO L225 Difference]: With dead ends: 175 [2018-01-21 05:57:57,456 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 05:57:57,460 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 05:57:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 05:57:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-01-21 05:57:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-01-21 05:57:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2018-01-21 05:57:57,492 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 11 [2018-01-21 05:57:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:57,493 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2018-01-21 05:57:57,493 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:57:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2018-01-21 05:57:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-01-21 05:57:57,493 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,493 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:57,493 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:57:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -578790635, now seen corresponding path program 1 times [2018-01-21 05:57:57,494 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,494 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,495 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,495 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:57:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:57:57,530 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:57:57,534 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:57:57,535 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:57:57,535 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:57:57,543 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:57:57,543 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:57:57,543 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:57:57,543 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:57:57,543 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:57:57,544 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:57:57,544 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:57:57,544 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:57:57,544 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:57:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2018-01-21 05:57:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-01-21 05:57:57,546 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,546 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:57,546 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1681322799, now seen corresponding path program 1 times [2018-01-21 05:57:57,546 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,547 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,547 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,547 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,547 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:57,553 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:57,561 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 05:57:57,561 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:57,561 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:57:57,561 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:57,562 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:57:57,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:57:57,562 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:57:57,562 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 2 states. [2018-01-21 05:57:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:57,569 INFO L93 Difference]: Finished difference Result 175 states and 213 transitions. [2018-01-21 05:57:57,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:57:57,569 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-01-21 05:57:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:57,571 INFO L225 Difference]: With dead ends: 175 [2018-01-21 05:57:57,571 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 05:57:57,572 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 05:57:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 05:57:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-01-21 05:57:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-01-21 05:57:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2018-01-21 05:57:57,581 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 9 [2018-01-21 05:57:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:57,581 INFO L432 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2018-01-21 05:57:57,581 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:57:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2018-01-21 05:57:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 05:57:57,582 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,582 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:57,583 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1430768294, now seen corresponding path program 1 times [2018-01-21 05:57:57,583 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,584 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,585 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:57,597 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:57,632 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 05:57:57,632 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:57,632 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:57:57,632 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:57,633 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 05:57:57,633 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 05:57:57,633 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 05:57:57,634 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 3 states. [2018-01-21 05:57:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:57,678 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2018-01-21 05:57:57,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 05:57:57,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-01-21 05:57:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:57,681 INFO L225 Difference]: With dead ends: 111 [2018-01-21 05:57:57,681 INFO L226 Difference]: Without dead ends: 109 [2018-01-21 05:57:57,681 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 05:57:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-01-21 05:57:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2018-01-21 05:57:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-21 05:57:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2018-01-21 05:57:57,689 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2018-01-21 05:57:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:57,689 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2018-01-21 05:57:57,689 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 05:57:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2018-01-21 05:57:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 05:57:57,690 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,690 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 05:57:57,690 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:57,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1220894246, now seen corresponding path program 1 times [2018-01-21 05:57:57,690 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,691 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,691 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,691 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,691 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:57,702 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:57,754 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 05:57:57,755 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:57,755 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 05:57:57,755 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:57,755 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 05:57:57,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 05:57:57,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 05:57:57,756 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 3 states. [2018-01-21 05:57:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:57,793 INFO L93 Difference]: Finished difference Result 186 states and 219 transitions. [2018-01-21 05:57:57,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 05:57:57,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2018-01-21 05:57:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:57,794 INFO L225 Difference]: With dead ends: 186 [2018-01-21 05:57:57,795 INFO L226 Difference]: Without dead ends: 105 [2018-01-21 05:57:57,795 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 05:57:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-01-21 05:57:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2018-01-21 05:57:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-21 05:57:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2018-01-21 05:57:57,801 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 21 [2018-01-21 05:57:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:57,801 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2018-01-21 05:57:57,801 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 05:57:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2018-01-21 05:57:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 05:57:57,802 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,802 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:57,802 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:57,802 INFO L82 PathProgramCache]: Analyzing trace with hash 354796251, now seen corresponding path program 1 times [2018-01-21 05:57:57,802 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,803 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,803 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:57,821 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:57:57,880 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:57,880 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:57:57,880 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:57,881 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:57:57,881 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:57:57,881 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:57:57,882 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 5 states. [2018-01-21 05:57:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:57,949 INFO L93 Difference]: Finished difference Result 265 states and 312 transitions. [2018-01-21 05:57:57,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:57:57,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-21 05:57:57,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:57,951 INFO L225 Difference]: With dead ends: 265 [2018-01-21 05:57:57,951 INFO L226 Difference]: Without dead ends: 182 [2018-01-21 05:57:57,952 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:57:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-01-21 05:57:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 103. [2018-01-21 05:57:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-21 05:57:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2018-01-21 05:57:57,961 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 30 [2018-01-21 05:57:57,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:57,962 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2018-01-21 05:57:57,962 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:57:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2018-01-21 05:57:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 05:57:57,963 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:57,963 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:57,964 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -626570212, now seen corresponding path program 1 times [2018-01-21 05:57:57,964 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:57,965 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,965 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:57,965 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:57,965 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:57,982 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:57:58,032 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:58,032 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 05:57:58,032 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:58,033 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:57:58,033 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:57:58,033 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:57:58,033 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 5 states. [2018-01-21 05:57:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:58,189 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2018-01-21 05:57:58,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 05:57:58,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2018-01-21 05:57:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:58,190 INFO L225 Difference]: With dead ends: 237 [2018-01-21 05:57:58,191 INFO L226 Difference]: Without dead ends: 157 [2018-01-21 05:57:58,192 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 05:57:58,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-01-21 05:57:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2018-01-21 05:57:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-01-21 05:57:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2018-01-21 05:57:58,199 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 31 [2018-01-21 05:57:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:58,199 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2018-01-21 05:57:58,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:57:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2018-01-21 05:57:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-01-21 05:57:58,200 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:58,201 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:58,201 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash 85377444, now seen corresponding path program 1 times [2018-01-21 05:57:58,201 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:58,202 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:58,202 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:58,202 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:58,202 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:58,221 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:57:58,303 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:58,304 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:57:58,304 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:58,304 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:57:58,305 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:57:58,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:57:58,305 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 4 states. [2018-01-21 05:57:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:58,378 INFO L93 Difference]: Finished difference Result 262 states and 298 transitions. [2018-01-21 05:57:58,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:57:58,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2018-01-21 05:57:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:58,381 INFO L225 Difference]: With dead ends: 262 [2018-01-21 05:57:58,381 INFO L226 Difference]: Without dead ends: 175 [2018-01-21 05:57:58,382 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:57:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-21 05:57:58,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 104. [2018-01-21 05:57:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-01-21 05:57:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2018-01-21 05:57:58,391 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 40 [2018-01-21 05:57:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:58,392 INFO L432 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2018-01-21 05:57:58,392 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:57:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2018-01-21 05:57:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 05:57:58,393 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:58,394 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 05:57:58,394 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:58,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1217411263, now seen corresponding path program 1 times [2018-01-21 05:57:58,394 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:58,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:58,395 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:58,396 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:58,396 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:58,423 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:57:58,701 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:57:58,701 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-21 05:57:58,702 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:57:58,702 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 05:57:58,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 05:57:58,702 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-21 05:57:58,702 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 10 states. [2018-01-21 05:57:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:57:59,083 INFO L93 Difference]: Finished difference Result 168 states and 189 transitions. [2018-01-21 05:57:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 05:57:59,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-01-21 05:57:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:57:59,085 INFO L225 Difference]: With dead ends: 168 [2018-01-21 05:57:59,086 INFO L226 Difference]: Without dead ends: 165 [2018-01-21 05:57:59,086 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2018-01-21 05:57:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-01-21 05:57:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 119. [2018-01-21 05:57:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-21 05:57:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2018-01-21 05:57:59,096 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 42 [2018-01-21 05:57:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:57:59,096 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2018-01-21 05:57:59,096 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 05:57:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2018-01-21 05:57:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 05:57:59,098 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:57:59,099 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:57:59,099 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0EnsuresViolation]=== [2018-01-21 05:57:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash -456231378, now seen corresponding path program 1 times [2018-01-21 05:57:59,099 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:57:59,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:59,100 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:57:59,100 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:57:59,101 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:57:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:57:59,130 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:57:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:57:59,729 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:57:59,729 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:57:59,730 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-01-21 05:57:59,733 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [15], [17], [18], [19], [24], [26], [29], [30], [36], [37], [43], [44], [48], [49], [58], [59], [60], [62], [63], [70], [74], [76], [79], [144], [145], [146], [150], [154], [156], [157], [158], [159], [160], [167], [174], [179], [181], [182], [183], [189], [190], [191] [2018-01-21 05:57:59,780 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:57:59,781 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