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_smtcomp.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-buckets_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 10:53:58,641 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 10:53:58,643 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 10:53:58,658 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 10:53:58,658 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 10:53:58,659 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 10:53:58,660 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 10:53:58,662 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 10:53:58,664 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 10:53:58,664 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 10:53:58,665 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 10:53:58,665 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 10:53:58,666 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 10:53:58,667 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 10:53:58,668 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 10:53:58,671 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 10:53:58,673 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 10:53:58,675 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 10:53:58,676 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 10:53:58,677 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 10:53:58,680 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 10:53:58,684 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 10:53:58,685 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 10:53:58,685 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_smtcomp.epf [2018-01-21 10:53:58,695 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 10:53:58,695 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 10:53:58,696 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 10:53:58,696 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 10:53:58,696 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 10:53:58,696 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 10:53:58,697 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 10:53:58,697 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 10:53:58,697 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 10:53:58,698 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 10:53:58,698 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 10:53:58,698 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 10:53:58,698 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 10:53:58,698 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 10:53:58,699 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 10:53:58,699 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 10:53:58,699 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 10:53:58,699 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 10:53:58,699 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 10:53:58,699 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 10:53:58,700 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 10:53:58,700 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 10:53:58,700 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 10:53:58,700 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 10:53:58,700 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 10:53:58,701 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 10:53:58,701 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 10:53:58,701 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 10:53:58,701 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 10:53:58,701 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 10:53:58,702 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 10:53:58,702 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 10:53:58,702 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 10:53:58,702 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 10:53:58,702 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 10:53:58,702 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 10:53:58,703 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 10:53:58,703 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 10:53:58,704 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 10:53:58,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 10:53:58,749 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 10:53:58,753 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 10:53:58,754 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 10:53:58,755 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 10:53:58,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-buckets_true-unreach-call_true-valid-memsafety.i [2018-01-21 10:53:58,928 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 10:53:58,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 10:53:58,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 10:53:58,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 10:53:58,938 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 10:53:58,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:53:58" (1/1) ... [2018-01-21 10:53:58,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44478139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:58, skipping insertion in model container [2018-01-21 10:53:58,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 10:53:58" (1/1) ... [2018-01-21 10:53:58,959 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:53:59,002 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 10:53:59,123 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:53:59,147 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 10:53:59,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59 WrapperNode [2018-01-21 10:53:59,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 10:53:59,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 10:53:59,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 10:53:59,159 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 10:53:59,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (1/1) ... [2018-01-21 10:53:59,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (1/1) ... [2018-01-21 10:53:59,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (1/1) ... [2018-01-21 10:53:59,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (1/1) ... [2018-01-21 10:53:59,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (1/1) ... [2018-01-21 10:53:59,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (1/1) ... [2018-01-21 10:53:59,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (1/1) ... [2018-01-21 10:53:59,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 10:53:59,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 10:53:59,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 10:53:59,199 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 10:53:59,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (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 10:53:59,243 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 10:53:59,243 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 10:53:59,243 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 10:53:59,244 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 10:53:59,245 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 10:53:59,245 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 10:53:59,245 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 10:53:59,617 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 10:53:59,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:53:59 BoogieIcfgContainer [2018-01-21 10:53:59,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 10:53:59,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 10:53:59,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 10:53:59,620 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 10:53:59,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 10:53:58" (1/3) ... [2018-01-21 10:53:59,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704c36cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:53:59, skipping insertion in model container [2018-01-21 10:53:59,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 10:53:59" (2/3) ... [2018-01-21 10:53:59,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704c36cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 10:53:59, skipping insertion in model container [2018-01-21 10:53:59,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 10:53:59" (3/3) ... [2018-01-21 10:53:59,623 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-buckets_true-unreach-call_true-valid-memsafety.i [2018-01-21 10:53:59,630 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 10:53:59,635 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 10:53:59,684 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:53:59,684 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:53:59,684 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:53:59,684 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:53:59,684 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:53:59,685 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:53:59,685 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:53:59,685 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 10:53:59,686 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:53:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2018-01-21 10:53:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 10:53:59,709 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:53:59,709 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 10:53:59,710 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 10:53:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash 258952, now seen corresponding path program 1 times [2018-01-21 10:53:59,716 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:53:59,760 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:53:59,761 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:53:59,761 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:53:59,761 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:53:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:53:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 10:53:59,816 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 10:53:59,821 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 10:53:59,827 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 10:53:59,827 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 10:53:59,827 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 10:53:59,827 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 10:53:59,827 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 10:53:59,828 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 10:53:59,828 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 10:53:59,828 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 10:53:59,828 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 10:53:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2018-01-21 10:53:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 10:53:59,832 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:53:59,833 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:53:59,833 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:53:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash -806241979, now seen corresponding path program 1 times [2018-01-21 10:53:59,833 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:53:59,834 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:53:59,834 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:53:59,835 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:53:59,835 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:53:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:53:59,885 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:54:00,044 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 10:54:00,046 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:54:00,046 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 10:54:00,046 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:54:00,049 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 10:54:00,063 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 10:54:00,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 10:54:00,067 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 2 states. [2018-01-21 10:54:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:54:00,094 INFO L93 Difference]: Finished difference Result 164 states and 218 transitions. [2018-01-21 10:54:00,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 10:54:00,096 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2018-01-21 10:54:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:54:00,108 INFO L225 Difference]: With dead ends: 164 [2018-01-21 10:54:00,109 INFO L226 Difference]: Without dead ends: 91 [2018-01-21 10:54:00,112 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 10:54:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-01-21 10:54:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-01-21 10:54:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-01-21 10:54:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2018-01-21 10:54:00,150 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 30 [2018-01-21 10:54:00,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:54:00,150 INFO L432 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2018-01-21 10:54:00,151 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 10:54:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2018-01-21 10:54:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 10:54:00,151 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:54:00,152 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] [2018-01-21 10:54:00,152 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:54:00,152 INFO L82 PathProgramCache]: Analyzing trace with hash -956225716, now seen corresponding path program 1 times [2018-01-21 10:54:00,152 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:54:00,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:54:00,153 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:54:00,153 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:54:00,153 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:54:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:54:00,185 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:54:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:54:00,282 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 10:54:00,282 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 10:54:00,282 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 10:54:00,284 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 10:54:00,284 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 10:54:00,284 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 10:54:00,285 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 5 states. [2018-01-21 10:54:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 10:54:00,455 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2018-01-21 10:54:00,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 10:54:00,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2018-01-21 10:54:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 10:54:00,457 INFO L225 Difference]: With dead ends: 153 [2018-01-21 10:54:00,457 INFO L226 Difference]: Without dead ends: 148 [2018-01-21 10:54:00,458 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 10:54:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-01-21 10:54:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2018-01-21 10:54:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-01-21 10:54:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2018-01-21 10:54:00,467 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 33 [2018-01-21 10:54:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 10:54:00,467 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2018-01-21 10:54:00,467 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 10:54:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2018-01-21 10:54:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 10:54:00,468 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 10:54:00,468 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 10:54:00,468 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 10:54:00,469 INFO L82 PathProgramCache]: Analyzing trace with hash -912780865, now seen corresponding path program 1 times [2018-01-21 10:54:00,469 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 10:54:00,469 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:54:00,470 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 10:54:00,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 10:54:00,470 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 10:54:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 10:54:00,508 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 10:54:01,298 WARN L146 SmtUtils]: Spent 295ms on a formula simplification. DAG size of input: 47 DAG size of output 35 [2018-01-21 10:54:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 10:54:01,448 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 10:54:01,448 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 10:54:01,449 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-01-21 10:54:01,451 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [21], [23], [26], [146], [150], [154], [156], [157], [158], [159], [163], [167], [198], [203], [207], [213], [214], [215], [216], [217], [221], [222], [224], [225], [230], [231], [232], [233], [234] [2018-01-21 10:54:01,508 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 10:54:01,508 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