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/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:28:44,401 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:28:44,403 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:28:44,416 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:28:44,417 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:28:44,418 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:28:44,419 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:28:44,420 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:28:44,422 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:28:44,423 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:28:44,423 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:28:44,423 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:28:44,424 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:28:44,425 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:28:44,425 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:28:44,428 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:28:44,430 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:28:44,431 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:28:44,433 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:28:44,434 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:28:44,436 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 06:28:44,440 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 06:28:44,441 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 06:28:44,441 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 06:28:44,450 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:28:44,451 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:28:44,451 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:28:44,452 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:28:44,452 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:28:44,452 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:28:44,452 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:28:44,452 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:28:44,453 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:28:44,453 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:28:44,453 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:28:44,454 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:28:44,454 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:28:44,454 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:28:44,454 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:28:44,454 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:28:44,454 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:28:44,455 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:28:44,455 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:28:44,455 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:28:44,455 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:28:44,455 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:28:44,456 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:28:44,456 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:28:44,456 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:28:44,456 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:28:44,456 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:28:44,457 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:28:44,457 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:28:44,457 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:28:44,457 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:28:44,457 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:28:44,457 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:28:44,458 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:28:44,458 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:28:44,458 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:28:44,458 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:28:44,459 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:28:44,459 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:28:44,492 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:28:44,505 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:28:44,509 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:28:44,511 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:28:44,511 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:28:44,512 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:28:44,703 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:28:44,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:28:44,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:28:44,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:28:44,713 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:28:44,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167329f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44, skipping insertion in model container [2018-01-21 06:28:44,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,730 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:28:44,770 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:28:44,894 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:28:44,920 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:28:44,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44 WrapperNode [2018-01-21 06:28:44,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:28:44,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:28:44,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:28:44,932 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:28:44,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (1/1) ... [2018-01-21 06:28:44,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:28:44,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:28:44,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:28:44,975 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:28:44,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (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 06:28:45,022 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:28:45,023 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:28:45,023 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:28:45,023 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 06:28:45,023 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 06:28:45,023 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:28:45,023 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:28:45,023 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:28:45,023 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:28:45,024 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:28:45,431 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:28:45,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:28:45 BoogieIcfgContainer [2018-01-21 06:28:45,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:28:45,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:28:45,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:28:45,435 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:28:45,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:28:44" (1/3) ... [2018-01-21 06:28:45,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bd672f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:28:45, skipping insertion in model container [2018-01-21 06:28:45,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:28:44" (2/3) ... [2018-01-21 06:28:45,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bd672f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:28:45, skipping insertion in model container [2018-01-21 06:28:45,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:28:45" (3/3) ... [2018-01-21 06:28:45,439 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:28:45,448 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:28:45,454 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 06:28:45,504 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:28:45,505 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:28:45,505 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:28:45,505 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:28:45,505 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:28:45,505 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:28:45,506 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:28:45,506 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:28:45,507 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:28:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 06:28:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:28:45,534 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:45,536 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:28:45,536 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:28:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash 195400, now seen corresponding path program 1 times [2018-01-21 06:28:45,543 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:45,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:45,584 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:45,585 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:45,585 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:28:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:28:45,643 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:28:45,650 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:28:45,657 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:28:45,658 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:28:45,658 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:28:45,658 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:28:45,658 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:28:45,658 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:28:45,658 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:28:45,658 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:28:45,658 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:28:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 06:28:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 06:28:45,662 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:45,662 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] [2018-01-21 06:28:45,662 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:28:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash 499029481, now seen corresponding path program 1 times [2018-01-21 06:28:45,663 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:45,663 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:45,664 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:45,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:45,664 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:28:45,694 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:28:45,825 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 06:28:45,828 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:28:45,828 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:28:45,829 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:28:45,832 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:28:45,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:28:45,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:28:45,851 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 06:28:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:28:45,877 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2018-01-21 06:28:45,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:28:45,879 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 06:28:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:28:45,891 INFO L225 Difference]: With dead ends: 124 [2018-01-21 06:28:45,891 INFO L226 Difference]: Without dead ends: 81 [2018-01-21 06:28:45,894 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 06:28:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-21 06:28:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-21 06:28:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-21 06:28:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2018-01-21 06:28:45,933 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 23 [2018-01-21 06:28:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:28:45,933 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2018-01-21 06:28:45,933 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:28:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2018-01-21 06:28:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 06:28:45,934 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:45,934 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] [2018-01-21 06:28:45,935 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:28:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash -245872207, now seen corresponding path program 1 times [2018-01-21 06:28:45,935 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:45,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:45,936 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:45,936 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:45,936 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:28:45,960 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:28:46,044 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 06:28:46,045 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:28:46,045 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:28:46,045 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:28:46,047 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:28:46,047 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:28:46,048 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:28:46,048 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 5 states. [2018-01-21 06:28:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:28:46,247 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2018-01-21 06:28:46,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:28:46,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-21 06:28:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:28:46,252 INFO L225 Difference]: With dead ends: 141 [2018-01-21 06:28:46,253 INFO L226 Difference]: Without dead ends: 125 [2018-01-21 06:28:46,254 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 06:28:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-01-21 06:28:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2018-01-21 06:28:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-21 06:28:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-21 06:28:46,265 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 27 [2018-01-21 06:28:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:28:46,266 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-21 06:28:46,266 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:28:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-21 06:28:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 06:28:46,268 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:46,268 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, 1, 1, 1, 1] [2018-01-21 06:28:46,268 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:28:46,268 INFO L82 PathProgramCache]: Analyzing trace with hash -130557319, now seen corresponding path program 1 times [2018-01-21 06:28:46,269 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:46,270 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,270 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:46,270 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,270 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:28:46,296 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:28:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 06:28:46,358 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:28:46,358 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 06:28:46,358 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:28:46,359 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 06:28:46,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 06:28:46,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 06:28:46,359 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 4 states. [2018-01-21 06:28:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:28:46,405 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2018-01-21 06:28:46,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:28:46,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-01-21 06:28:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:28:46,406 INFO L225 Difference]: With dead ends: 129 [2018-01-21 06:28:46,406 INFO L226 Difference]: Without dead ends: 90 [2018-01-21 06:28:46,407 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:28:46,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-21 06:28:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2018-01-21 06:28:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-21 06:28:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-01-21 06:28:46,415 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 48 [2018-01-21 06:28:46,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:28:46,416 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-01-21 06:28:46,416 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 06:28:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-01-21 06:28:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 06:28:46,418 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:46,418 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, 1, 1, 1, 1, 1, 1] [2018-01-21 06:28:46,418 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:28:46,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1094978108, now seen corresponding path program 1 times [2018-01-21 06:28:46,419 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:46,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,420 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:46,420 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,420 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:28:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:28:46,490 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:28:46,500 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:28:46,506 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:28:46,507 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:28:46,519 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:28:46,520 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:28:46,520 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:28:46,520 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:28:46,520 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:28:46,520 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:28:46,520 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:28:46,520 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 06:28:46,520 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:28:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 06:28:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 06:28:46,522 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:46,523 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 06:28:46,523 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 06:28:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1898919954, now seen corresponding path program 1 times [2018-01-21 06:28:46,523 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:46,524 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,524 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:46,524 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,524 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:28:46,536 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:28:46,549 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 06:28:46,549 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:28:46,549 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:28:46,549 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:28:46,550 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:28:46,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:28:46,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:28:46,550 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 06:28:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:28:46,555 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2018-01-21 06:28:46,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:28:46,555 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 06:28:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:28:46,556 INFO L225 Difference]: With dead ends: 124 [2018-01-21 06:28:46,557 INFO L226 Difference]: Without dead ends: 79 [2018-01-21 06:28:46,557 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 06:28:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-21 06:28:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-01-21 06:28:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-21 06:28:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2018-01-21 06:28:46,564 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 21 [2018-01-21 06:28:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:28:46,564 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2018-01-21 06:28:46,564 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:28:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2018-01-21 06:28:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 06:28:46,565 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:46,565 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] [2018-01-21 06:28:46,565 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 06:28:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1934937526, now seen corresponding path program 1 times [2018-01-21 06:28:46,566 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:46,567 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,567 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:46,567 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,567 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:28:46,578 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:28:46,628 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 06:28:46,628 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:28:46,628 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:28:46,628 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:28:46,629 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:28:46,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:28:46,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:28:46,629 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 5 states. [2018-01-21 06:28:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:28:46,773 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2018-01-21 06:28:46,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:28:46,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-21 06:28:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:28:46,776 INFO L225 Difference]: With dead ends: 137 [2018-01-21 06:28:46,776 INFO L226 Difference]: Without dead ends: 123 [2018-01-21 06:28:46,777 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 06:28:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-21 06:28:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2018-01-21 06:28:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-21 06:28:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-01-21 06:28:46,787 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 25 [2018-01-21 06:28:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:28:46,788 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-01-21 06:28:46,788 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:28:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-01-21 06:28:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 06:28:46,790 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:46,790 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, 1, 1] [2018-01-21 06:28:46,790 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 06:28:46,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1827795070, now seen corresponding path program 1 times [2018-01-21 06:28:46,791 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:46,791 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,792 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:46,792 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,792 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:28:46,808 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:28:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 06:28:46,849 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:28:46,850 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 06:28:46,850 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:28:46,850 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 06:28:46,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 06:28:46,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 06:28:46,851 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 4 states. [2018-01-21 06:28:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:28:46,874 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2018-01-21 06:28:46,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:28:46,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2018-01-21 06:28:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:28:46,876 INFO L225 Difference]: With dead ends: 125 [2018-01-21 06:28:46,876 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 06:28:46,877 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:28:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 06:28:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2018-01-21 06:28:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-21 06:28:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-21 06:28:46,885 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 46 [2018-01-21 06:28:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:28:46,885 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-21 06:28:46,885 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 06:28:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-21 06:28:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 06:28:46,887 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:28:46,887 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, 1, 1, 1, 1] [2018-01-21 06:28:46,887 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 06:28:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1002255617, now seen corresponding path program 1 times [2018-01-21 06:28:46,888 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:28:46,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,889 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:28:46,889 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:28:46,889 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:28:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:28:46,905 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:28:47,118 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 06:28:47,118 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:28:47,119 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:28:47,120 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-01-21 06:28:47,122 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [14], [17], [18], [19], [25], [29], [31], [34], [67], [71], [75], [77], [81], [82], [83], [90], [92], [100], [102], [107], [108], [109], [115], [119], [125], [126], [130], [134], [138], [140], [141], [142], [143], [151], [153], [157], [159], [160], [161], [167], [168], [169] [2018-01-21 06:28:47,185 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:28:47,186 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