java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:12:58,589 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:12:58,621 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:12:58,636 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:12:58,637 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:12:58,638 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:12:58,639 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:12:58,640 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:12:58,642 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:12:58,643 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:12:58,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:12:58,644 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:12:58,645 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:12:58,646 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:12:58,647 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:12:58,650 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:12:58,652 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:12:58,654 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:12:58,655 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:12:58,656 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:12:58,658 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:12:58,664 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-21 00:12:58,673 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:12:58,674 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:12:58,674 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:12:58,674 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:12:58,674 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:12:58,675 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:12:58,675 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:12:58,675 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:12:58,675 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:12:58,675 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:12:58,675 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:12:58,676 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:12:58,676 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:12:58,676 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:12:58,676 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:12:58,676 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:12:58,676 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:12:58,676 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:12:58,677 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:12:58,677 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:12:58,677 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:12:58,677 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:12:58,677 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:12:58,677 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:12:58,678 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:12:58,678 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:12:58,678 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:12:58,678 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:12:58,678 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:12:58,678 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:12:58,678 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:12:58,679 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:12:58,679 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:12:58,679 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:12:58,679 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:12:58,679 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:12:58,680 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:12:58,680 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:12:58,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:12:58,722 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:12:58,725 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:12:58,726 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:12:58,726 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:12:58,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:12:58,889 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:12:58,892 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:12:58,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:12:58,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:12:58,898 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:12:58,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:12:58" (1/1) ... [2018-01-21 00:12:58,902 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 12:12:58, skipping insertion in model container [2018-01-21 00:12:58,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:12:58" (1/1) ... [2018-01-21 00:12:58,916 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:12:58,956 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:12:59,079 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:12:59,101 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:12:59,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59 WrapperNode [2018-01-21 00:12:59,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:12:59,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:12:59,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:12:59,112 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:12:59,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (1/1) ... [2018-01-21 00:12:59,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (1/1) ... [2018-01-21 00:12:59,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (1/1) ... [2018-01-21 00:12:59,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (1/1) ... [2018-01-21 00:12:59,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (1/1) ... [2018-01-21 00:12:59,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (1/1) ... [2018-01-21 00:12:59,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (1/1) ... [2018-01-21 00:12:59,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:12:59,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:12:59,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:12:59,157 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:12:59,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (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 00:12:59,208 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:12:59,209 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:12:59,209 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:12:59,209 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:12:59,209 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:12:59,209 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:12:59,209 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:12:59,209 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:12:59,209 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:12:59,209 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:12:59,210 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:12:59,210 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:12:59,210 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:12:59,210 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 00:12:59,210 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:12:59,210 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:12:59,210 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:12:59,577 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:12:59,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:12:59 BoogieIcfgContainer [2018-01-21 00:12:59,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:12:59,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:12:59,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:12:59,581 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:12:59,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:12:58" (1/3) ... [2018-01-21 00:12:59,583 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 12:12:59, skipping insertion in model container [2018-01-21 00:12:59,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:12:59" (2/3) ... [2018-01-21 00:12:59,583 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 12:12:59, skipping insertion in model container [2018-01-21 00:12:59,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:12:59" (3/3) ... [2018-01-21 00:12:59,585 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-optional_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:12:59,594 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:12:59,600 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 00:12:59,636 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:12:59,636 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:12:59,637 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:12:59,637 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:12:59,637 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:12:59,637 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:12:59,637 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:12:59,637 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:12:59,638 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:12:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 00:12:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:12:59,666 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:12:59,667 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:12:59,668 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:12:59,672 INFO L82 PathProgramCache]: Analyzing trace with hash 195400, now seen corresponding path program 1 times [2018-01-21 00:12:59,674 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:12:59,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:12:59,715 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:12:59,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:12:59,715 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:12:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:12:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:12:59,773 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:12:59,782 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:12:59,789 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:12:59,789 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:12:59,789 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:12:59,789 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:12:59,790 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:12:59,790 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:12:59,790 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:12:59,790 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:12:59,790 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:12:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 00:12:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 00:12:59,794 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:12:59,794 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 00:12:59,794 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:12:59,794 INFO L82 PathProgramCache]: Analyzing trace with hash 499029481, now seen corresponding path program 1 times [2018-01-21 00:12:59,794 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:12:59,795 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:12:59,795 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:12:59,795 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:12:59,795 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:12:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:12:59,825 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:12:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:12:59,961 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:12:59,962 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:12:59,962 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:12:59,965 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:12:59,980 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:12:59,980 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:12:59,983 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 00:13:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:13:00,008 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2018-01-21 00:13:00,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:13:00,009 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 00:13:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:13:00,020 INFO L225 Difference]: With dead ends: 124 [2018-01-21 00:13:00,020 INFO L226 Difference]: Without dead ends: 81 [2018-01-21 00:13:00,023 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:13:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-01-21 00:13:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-01-21 00:13:00,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-01-21 00:13:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2018-01-21 00:13:00,060 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 23 [2018-01-21 00:13:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:13:00,060 INFO L432 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2018-01-21 00:13:00,060 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:13:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2018-01-21 00:13:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 00:13:00,062 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:13:00,062 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] [2018-01-21 00:13:00,062 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:13:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash -245872207, now seen corresponding path program 1 times [2018-01-21 00:13:00,062 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:13:00,063 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,063 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:13:00,063 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,064 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:13:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:13:00,088 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:13:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:13:00,169 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:13:00,169 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:13:00,169 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:13:00,171 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:13:00,171 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:13:00,171 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:13:00,172 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 5 states. [2018-01-21 00:13:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:13:00,375 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2018-01-21 00:13:00,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:13:00,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-21 00:13:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:13:00,380 INFO L225 Difference]: With dead ends: 141 [2018-01-21 00:13:00,380 INFO L226 Difference]: Without dead ends: 125 [2018-01-21 00:13:00,381 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:13:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-01-21 00:13:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2018-01-21 00:13:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-21 00:13:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-21 00:13:00,393 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 27 [2018-01-21 00:13:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:13:00,394 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-21 00:13:00,394 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:13:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-21 00:13:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 00:13:00,396 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:13:00,396 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 00:13:00,396 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:13:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash -130557319, now seen corresponding path program 1 times [2018-01-21 00:13:00,397 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:13:00,398 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,398 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:13:00,398 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,398 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:13:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:13:00,425 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:13:00,485 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 00:13:00,485 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:13:00,485 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:13:00,485 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:13:00,486 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:13:00,486 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:13:00,487 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:13:00,487 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 4 states. [2018-01-21 00:13:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:13:00,510 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2018-01-21 00:13:00,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:13:00,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2018-01-21 00:13:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:13:00,511 INFO L225 Difference]: With dead ends: 129 [2018-01-21 00:13:00,511 INFO L226 Difference]: Without dead ends: 90 [2018-01-21 00:13:00,512 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 00:13:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-01-21 00:13:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2018-01-21 00:13:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-01-21 00:13:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2018-01-21 00:13:00,518 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 48 [2018-01-21 00:13:00,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:13:00,519 INFO L432 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2018-01-21 00:13:00,519 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:13:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2018-01-21 00:13:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-01-21 00:13:00,520 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:13:00,520 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 00:13:00,520 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:13:00,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1094978108, now seen corresponding path program 1 times [2018-01-21 00:13:00,520 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:13:00,521 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,521 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:13:00,521 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,521 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:13:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:13:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:13:00,589 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:13:00,598 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:13:00,605 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:13:00,606 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:13:00,616 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:13:00,617 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:13:00,617 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:13:00,617 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:13:00,617 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:13:00,617 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:13:00,617 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:13:00,617 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:13:00,617 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:13:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2018-01-21 00:13:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 00:13:00,619 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:13:00,619 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:13:00,620 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:13:00,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1898919954, now seen corresponding path program 1 times [2018-01-21 00:13:00,620 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:13:00,621 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,621 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:13:00,621 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,621 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:13:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:13:00,631 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:13:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:13:00,644 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:13:00,644 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:13:00,644 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:13:00,644 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:13:00,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:13:00,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:13:00,645 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 2 states. [2018-01-21 00:13:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:13:00,651 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2018-01-21 00:13:00,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:13:00,651 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 00:13:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:13:00,652 INFO L225 Difference]: With dead ends: 124 [2018-01-21 00:13:00,652 INFO L226 Difference]: Without dead ends: 79 [2018-01-21 00:13:00,653 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:13:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-21 00:13:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-01-21 00:13:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-01-21 00:13:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2018-01-21 00:13:00,659 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 21 [2018-01-21 00:13:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:13:00,660 INFO L432 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2018-01-21 00:13:00,660 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:13:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2018-01-21 00:13:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 00:13:00,661 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:13:00,661 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 00:13:00,661 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 00:13:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1934937526, now seen corresponding path program 1 times [2018-01-21 00:13:00,662 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:13:00,663 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,663 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:13:00,663 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,663 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:13:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:13:00,674 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:13:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:13:00,724 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:13:00,724 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:13:00,724 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:13:00,724 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:13:00,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:13:00,725 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:13:00,725 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 5 states. [2018-01-21 00:13:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:13:00,894 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2018-01-21 00:13:00,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:13:00,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2018-01-21 00:13:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:13:00,896 INFO L225 Difference]: With dead ends: 137 [2018-01-21 00:13:00,896 INFO L226 Difference]: Without dead ends: 123 [2018-01-21 00:13:00,897 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:13:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-01-21 00:13:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2018-01-21 00:13:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-01-21 00:13:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2018-01-21 00:13:00,906 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 25 [2018-01-21 00:13:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:13:00,907 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2018-01-21 00:13:00,907 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:13:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2018-01-21 00:13:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 00:13:00,909 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:13:00,909 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 00:13:00,909 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 00:13:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1827795070, now seen corresponding path program 1 times [2018-01-21 00:13:00,910 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:13:00,910 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,911 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:13:00,911 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:00,911 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:13:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:13:00,928 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:13:00,959 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 00:13:00,959 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:13:00,959 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:13:00,959 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:13:00,960 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:13:00,960 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:13:00,960 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:13:00,960 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 4 states. [2018-01-21 00:13:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:13:00,994 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2018-01-21 00:13:00,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:13:00,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2018-01-21 00:13:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:13:00,995 INFO L225 Difference]: With dead ends: 125 [2018-01-21 00:13:00,995 INFO L226 Difference]: Without dead ends: 88 [2018-01-21 00:13:00,996 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 00:13:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-01-21 00:13:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2018-01-21 00:13:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-21 00:13:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2018-01-21 00:13:01,003 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 46 [2018-01-21 00:13:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:13:01,003 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2018-01-21 00:13:01,003 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:13:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2018-01-21 00:13:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-01-21 00:13:01,004 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:13:01,005 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 00:13:01,005 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 00:13:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1002255617, now seen corresponding path program 1 times [2018-01-21 00:13:01,005 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:13:01,006 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:01,006 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:13:01,006 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:13:01,006 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:13:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:13:01,022 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:13:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:13:01,184 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:13:01,184 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:13:01,185 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-01-21 00:13:01,187 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 00:13:01,250 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:13:01,250 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