java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-circular_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:44:51,661 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:44:51,663 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:44:51,677 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:44:51,677 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:44:51,678 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:44:51,679 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:44:51,681 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:44:51,683 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:44:51,684 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:44:51,685 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:44:51,685 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:44:51,686 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:44:51,687 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:44:51,688 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:44:51,691 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:44:51,693 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:44:51,695 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:44:51,696 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:44:51,697 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:44:51,699 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:44:51,704 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:44:51,705 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:44:51,705 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 03:44:51,715 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:44:51,715 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:44:51,716 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:44:51,716 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:44:51,716 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:44:51,717 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:44:51,717 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:44:51,717 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:44:51,717 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:44:51,718 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:44:51,718 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:44:51,718 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:44:51,718 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:44:51,719 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:44:51,719 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:44:51,719 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:44:51,719 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:44:51,719 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:44:51,719 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:44:51,719 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:44:51,720 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:44:51,720 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:44:51,720 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:44:51,720 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:44:51,720 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:44:51,720 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:44:51,721 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:44:51,721 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:44:51,721 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:44:51,721 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:44:51,721 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:44:51,722 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:44:51,722 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:44:51,722 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:44:51,722 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:44:51,722 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:44:51,722 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:44:51,722 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:44:51,723 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:44:51,724 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:44:51,759 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:44:51,771 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:44:51,776 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:44:51,777 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:44:51,778 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:44:51,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-circular_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:44:51,976 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:44:51,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:44:51,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:44:51,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:44:51,990 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:44:51,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:44:51" (1/1) ... [2018-01-21 03:44:51,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c64e82b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:51, skipping insertion in model container [2018-01-21 03:44:51,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:44:51" (1/1) ... [2018-01-21 03:44:52,013 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:44:52,070 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:44:52,189 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:44:52,212 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:44:52,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52 WrapperNode [2018-01-21 03:44:52,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:44:52,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:44:52,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:44:52,219 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:44:52,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... [2018-01-21 03:44:52,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... [2018-01-21 03:44:52,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... [2018-01-21 03:44:52,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... [2018-01-21 03:44:52,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... [2018-01-21 03:44:52,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... [2018-01-21 03:44:52,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... [2018-01-21 03:44:52,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:44:52,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:44:52,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:44:52,261 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:44:52,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:44:52,316 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:44:52,316 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:44:52,316 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:44:52,316 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:44:52,316 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:44:52,316 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:44:52,316 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:44:52,316 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:44:52,316 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:44:52,317 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:44:52,317 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:44:52,317 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:44:52,317 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:44:52,317 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 03:44:52,318 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:44:52,318 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:44:52,318 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:44:52,556 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:44:52,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:44:52 BoogieIcfgContainer [2018-01-21 03:44:52,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:44:52,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:44:52,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:44:52,560 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:44:52,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:44:51" (1/3) ... [2018-01-21 03:44:52,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf47da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:44:52, skipping insertion in model container [2018-01-21 03:44:52,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:44:52" (2/3) ... [2018-01-21 03:44:52,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf47da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:44:52, skipping insertion in model container [2018-01-21 03:44:52,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:44:52" (3/3) ... [2018-01-21 03:44:52,563 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-circular_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:44:52,573 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:44:52,584 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:44:52,633 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:44:52,633 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:44:52,633 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:44:52,633 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:44:52,633 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:44:52,633 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:44:52,634 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:44:52,634 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:44:52,635 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:44:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 03:44:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:44:52,662 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:44:52,663 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:44:52,663 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:44:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash 186463, now seen corresponding path program 1 times [2018-01-21 03:44:52,671 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:44:52,720 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:52,721 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:44:52,721 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:52,721 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:44:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:44:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:44:52,781 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:44:52,788 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:44:52,794 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:44:52,794 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:44:52,794 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:44:52,794 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:44:52,794 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:44:52,795 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:44:52,795 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:44:52,795 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:44:52,795 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:44:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 03:44:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 03:44:52,799 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:44:52,799 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] [2018-01-21 03:44:52,799 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:44:52,799 INFO L82 PathProgramCache]: Analyzing trace with hash 128587636, now seen corresponding path program 1 times [2018-01-21 03:44:52,800 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:44:52,800 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:52,801 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:44:52,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:52,801 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:44:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:44:52,836 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:44:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:44:52,882 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:44:52,882 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:44:52,883 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:44:52,885 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:44:52,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:44:52,902 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:44:52,905 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2018-01-21 03:44:53,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:44:53,012 INFO L93 Difference]: Finished difference Result 119 states and 155 transitions. [2018-01-21 03:44:53,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:44:53,013 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-01-21 03:44:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:44:53,021 INFO L225 Difference]: With dead ends: 119 [2018-01-21 03:44:53,021 INFO L226 Difference]: Without dead ends: 62 [2018-01-21 03:44:53,024 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:44:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-21 03:44:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-01-21 03:44:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-01-21 03:44:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2018-01-21 03:44:53,060 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 24 [2018-01-21 03:44:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:44:53,060 INFO L432 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2018-01-21 03:44:53,060 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:44:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2018-01-21 03:44:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 03:44:53,062 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:44:53,062 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:44:53,062 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:44:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash 724775855, now seen corresponding path program 1 times [2018-01-21 03:44:53,063 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:44:53,064 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:53,064 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:44:53,064 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:53,064 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:44:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:44:53,109 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:44:53,678 WARN L146 SmtUtils]: Spent 138ms on a formula simplification. DAG size of input: 34 DAG size of output 22 [2018-01-21 03:44:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:44:53,931 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:44:54,084 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-01-21 03:44:54,084 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:44:54,086 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 03:44:54,086 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 03:44:54,086 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-01-21 03:44:54,087 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 12 states. [2018-01-21 03:44:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:44:54,702 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2018-01-21 03:44:54,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-21 03:44:54,702 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-01-21 03:44:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:44:54,706 INFO L225 Difference]: With dead ends: 128 [2018-01-21 03:44:54,706 INFO L226 Difference]: Without dead ends: 114 [2018-01-21 03:44:54,707 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2018-01-21 03:44:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-01-21 03:44:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2018-01-21 03:44:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-21 03:44:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-01-21 03:44:54,715 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 32 [2018-01-21 03:44:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:44:54,716 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-01-21 03:44:54,716 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 03:44:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-01-21 03:44:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 03:44:54,717 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:44:54,717 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:44:54,717 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:44:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1505215911, now seen corresponding path program 1 times [2018-01-21 03:44:54,718 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:44:54,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:54,719 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:44:54,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:54,719 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:44:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:44:54,737 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:44:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:44:54,775 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:44:54,775 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 03:44:54,775 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:44:54,776 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:44:54,776 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:44:54,776 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:44:54,776 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 3 states. [2018-01-21 03:44:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:44:54,809 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-01-21 03:44:54,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:44:54,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2018-01-21 03:44:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:44:54,813 INFO L225 Difference]: With dead ends: 175 [2018-01-21 03:44:54,813 INFO L226 Difference]: Without dead ends: 123 [2018-01-21 03:44:54,816 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:44:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-21 03:44:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2018-01-21 03:44:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-21 03:44:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2018-01-21 03:44:54,830 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 41 [2018-01-21 03:44:54,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:44:54,831 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2018-01-21 03:44:54,832 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:44:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2018-01-21 03:44:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 03:44:54,834 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:44:54,834 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:44:54,834 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:44:54,834 INFO L82 PathProgramCache]: Analyzing trace with hash 977083296, now seen corresponding path program 1 times [2018-01-21 03:44:54,834 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:44:54,836 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:54,836 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:44:54,836 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:54,836 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:44:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:44:54,860 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:44:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:44:55,419 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:44:55,419 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-01-21 03:44:55,419 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:44:55,419 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-21 03:44:55,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-21 03:44:55,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-01-21 03:44:55,420 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 13 states. [2018-01-21 03:44:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:44:55,822 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2018-01-21 03:44:55,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 03:44:55,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2018-01-21 03:44:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:44:55,824 INFO L225 Difference]: With dead ends: 159 [2018-01-21 03:44:55,824 INFO L226 Difference]: Without dead ends: 129 [2018-01-21 03:44:55,825 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2018-01-21 03:44:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-01-21 03:44:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2018-01-21 03:44:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-01-21 03:44:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2018-01-21 03:44:55,837 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 44 [2018-01-21 03:44:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:44:55,837 INFO L432 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2018-01-21 03:44:55,837 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-21 03:44:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2018-01-21 03:44:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 03:44:55,839 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:44:55,839 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 03:44:55,840 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:44:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1973007188, now seen corresponding path program 1 times [2018-01-21 03:44:55,840 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:44:55,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:55,841 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:44:55,841 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:44:55,841 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:44:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:44:55,856 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:44:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:44:56,347 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:44:56,348 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:44:56,349 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-21 03:44:56,350 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [8], [10], [13], [15], [16], [17], [18], [19], [20], [21], [37], [39], [43], [48], [52], [61], [62], [63], [67], [72], [76], [84], [86], [89], [128], [129], [133], [135], [138], [147], [148], [149], [151], [152], [157], [158], [159], [160], [161] [2018-01-21 03:44:56,412 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:44:56,412 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