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/dll-01_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:38:58,205 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:38:58,207 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:38:58,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:38:58,221 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:38:58,221 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:38:58,222 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:38:58,224 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:38:58,225 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:38:58,226 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:38:58,227 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:38:58,227 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:38:58,228 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:38:58,229 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:38:58,231 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:38:58,233 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:38:58,236 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:38:58,238 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:38:58,239 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:38:58,240 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:38:58,243 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:38:58,248 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:38:58,249 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:38:58,249 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 03:38:58,259 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:38:58,260 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:38:58,260 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:38:58,261 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:38:58,261 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:38:58,261 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:38:58,261 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:38:58,262 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:38:58,262 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:38:58,263 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:38:58,263 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:38:58,263 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:38:58,263 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:38:58,263 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:38:58,264 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:38:58,264 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:38:58,264 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:38:58,264 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:38:58,264 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:38:58,265 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:38:58,265 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:38:58,265 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:38:58,265 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:38:58,265 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:38:58,266 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:38:58,266 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:38:58,266 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:38:58,266 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:38:58,266 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:38:58,267 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:38:58,267 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:38:58,267 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:38:58,267 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:38:58,267 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:38:58,268 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:38:58,268 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:38:58,268 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:38:58,268 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:38:58,269 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:38:58,269 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:38:58,304 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:38:58,316 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:38:58,319 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:38:58,321 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:38:58,321 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:38:58,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:38:58,528 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:38:58,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:38:58,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:38:58,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:38:58,538 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:38:58,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f8129e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58, skipping insertion in model container [2018-01-21 03:38:58,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,556 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:38:58,598 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:38:58,730 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:38:58,760 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:38:58,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58 WrapperNode [2018-01-21 03:38:58,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:38:58,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:38:58,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:38:58,774 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:38:58,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (1/1) ... [2018-01-21 03:38:58,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:38:58,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:38:58,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:38:58,818 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:38:58,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (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 03:38:58,984 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:38:58,984 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:38:58,984 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 03:38:58,985 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 03:38:58,986 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:38:58,986 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:38:58,986 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:38:59,487 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:38:59,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:38:59 BoogieIcfgContainer [2018-01-21 03:38:59,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:38:59,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:38:59,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:38:59,491 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:38:59,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:38:58" (1/3) ... [2018-01-21 03:38:59,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e7a591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:38:59, skipping insertion in model container [2018-01-21 03:38:59,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:38:58" (2/3) ... [2018-01-21 03:38:59,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e7a591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:38:59, skipping insertion in model container [2018-01-21 03:38:59,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:38:59" (3/3) ... [2018-01-21 03:38:59,494 INFO L105 eAbstractionObserver]: Analyzing ICFG dll-01_true-unreach-call_true-valid-memsafety.i [2018-01-21 03:38:59,501 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:38:59,508 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 03:38:59,550 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:38:59,550 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:38:59,550 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:38:59,550 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:38:59,551 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:38:59,551 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:38:59,551 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:38:59,551 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:38:59,552 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:38:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2018-01-21 03:38:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:38:59,576 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:38:59,577 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:38:59,577 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:38:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 396895, now seen corresponding path program 1 times [2018-01-21 03:38:59,583 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:38:59,627 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:38:59,627 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:38:59,627 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:38:59,627 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:38:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:38:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:38:59,684 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:38:59,690 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:38:59,696 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:38:59,696 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:38:59,696 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:38:59,696 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:38:59,696 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:38:59,697 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:38:59,697 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:38:59,697 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:38:59,697 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:38:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2018-01-21 03:38:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-21 03:38:59,701 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:38:59,702 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 03:38:59,702 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:38:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1539010196, now seen corresponding path program 1 times [2018-01-21 03:38:59,702 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:38:59,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:38:59,703 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:38:59,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:38:59,703 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:38:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:38:59,730 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:38:59,765 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 03:38:59,767 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:38:59,767 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:38:59,767 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:38:59,770 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:38:59,853 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:38:59,854 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:38:59,857 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 2 states. [2018-01-21 03:38:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:38:59,893 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2018-01-21 03:38:59,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:38:59,894 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2018-01-21 03:38:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:38:59,908 INFO L225 Difference]: With dead ends: 244 [2018-01-21 03:38:59,908 INFO L226 Difference]: Without dead ends: 124 [2018-01-21 03:38:59,912 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 03:38:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-01-21 03:38:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-01-21 03:38:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-21 03:38:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2018-01-21 03:38:59,952 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 24 [2018-01-21 03:38:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:38:59,952 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2018-01-21 03:38:59,952 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:38:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2018-01-21 03:38:59,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 03:38:59,953 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:38:59,954 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] [2018-01-21 03:38:59,954 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:38:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash 849242386, now seen corresponding path program 1 times [2018-01-21 03:38:59,954 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:38:59,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:38:59,955 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:38:59,955 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:38:59,955 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:38:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:38:59,976 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:39:00,094 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 03:39:00,094 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:39:00,094 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:39:00,094 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:39:00,096 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:39:00,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:39:00,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:39:00,096 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 5 states. [2018-01-21 03:39:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:39:00,411 INFO L93 Difference]: Finished difference Result 287 states and 310 transitions. [2018-01-21 03:39:00,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 03:39:00,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-01-21 03:39:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:39:00,416 INFO L225 Difference]: With dead ends: 287 [2018-01-21 03:39:00,416 INFO L226 Difference]: Without dead ends: 192 [2018-01-21 03:39:00,418 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 03:39:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-01-21 03:39:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 128. [2018-01-21 03:39:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-01-21 03:39:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2018-01-21 03:39:00,429 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 37 [2018-01-21 03:39:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:39:00,429 INFO L432 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2018-01-21 03:39:00,429 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:39:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2018-01-21 03:39:00,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 03:39:00,430 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:39:00,430 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] [2018-01-21 03:39:00,430 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:39:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1513386891, now seen corresponding path program 1 times [2018-01-21 03:39:00,431 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:39:00,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,431 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:39:00,431 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,432 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:39:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:39:00,447 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:39:00,499 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 03:39:00,500 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:39:00,501 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:39:00,501 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:39:00,502 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:39:00,502 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:39:00,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:39:00,503 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 5 states. [2018-01-21 03:39:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:39:00,645 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2018-01-21 03:39:00,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:39:00,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2018-01-21 03:39:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:39:00,648 INFO L225 Difference]: With dead ends: 213 [2018-01-21 03:39:00,648 INFO L226 Difference]: Without dead ends: 186 [2018-01-21 03:39:00,649 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 03:39:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-01-21 03:39:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 132. [2018-01-21 03:39:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-01-21 03:39:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2018-01-21 03:39:00,663 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 39 [2018-01-21 03:39:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:39:00,663 INFO L432 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2018-01-21 03:39:00,663 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:39:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2018-01-21 03:39:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-01-21 03:39:00,666 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:39:00,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:39:00,666 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:39:00,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1547435689, now seen corresponding path program 1 times [2018-01-21 03:39:00,667 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:39:00,668 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,668 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:39:00,668 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,668 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:39:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:39:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:39:00,733 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:39:00,746 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:39:00,757 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:39:00,757 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:39:00,777 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:39:00,778 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:39:00,778 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:39:00,778 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:39:00,778 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:39:00,778 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:39:00,778 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:39:00,778 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 03:39:00,779 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:39:00,781 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2018-01-21 03:39:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 03:39:00,783 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:39:00,783 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] [2018-01-21 03:39:00,783 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 03:39:00,783 INFO L82 PathProgramCache]: Analyzing trace with hash 565995656, now seen corresponding path program 1 times [2018-01-21 03:39:00,784 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:39:00,785 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,785 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:39:00,786 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,786 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:39:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:39:00,793 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:39:00,803 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 03:39:00,803 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:39:00,803 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:39:00,803 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:39:00,804 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:39:00,804 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:39:00,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:39:00,804 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 2 states. [2018-01-21 03:39:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:39:00,810 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2018-01-21 03:39:00,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:39:00,810 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 03:39:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:39:00,811 INFO L225 Difference]: With dead ends: 244 [2018-01-21 03:39:00,812 INFO L226 Difference]: Without dead ends: 122 [2018-01-21 03:39:00,812 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 03:39:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-01-21 03:39:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-01-21 03:39:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-21 03:39:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2018-01-21 03:39:00,821 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 22 [2018-01-21 03:39:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:39:00,821 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2018-01-21 03:39:00,821 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:39:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2018-01-21 03:39:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 03:39:00,823 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:39:00,823 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] [2018-01-21 03:39:00,823 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 03:39:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash -673975890, now seen corresponding path program 1 times [2018-01-21 03:39:00,823 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:39:00,824 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,825 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:39:00,825 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:00,825 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:39:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:39:00,837 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:39:00,906 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 03:39:00,906 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:39:00,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:39:00,906 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:39:00,907 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:39:00,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:39:00,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:39:00,907 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 5 states. [2018-01-21 03:39:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:39:01,062 INFO L93 Difference]: Finished difference Result 283 states and 305 transitions. [2018-01-21 03:39:01,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 03:39:01,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2018-01-21 03:39:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:39:01,064 INFO L225 Difference]: With dead ends: 283 [2018-01-21 03:39:01,065 INFO L226 Difference]: Without dead ends: 190 [2018-01-21 03:39:01,065 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 03:39:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-01-21 03:39:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 126. [2018-01-21 03:39:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-01-21 03:39:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2018-01-21 03:39:01,073 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 35 [2018-01-21 03:39:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:39:01,074 INFO L432 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2018-01-21 03:39:01,074 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:39:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2018-01-21 03:39:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-01-21 03:39:01,075 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:39:01,075 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] [2018-01-21 03:39:01,076 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 03:39:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1839763921, now seen corresponding path program 1 times [2018-01-21 03:39:01,076 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:39:01,077 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:01,077 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:39:01,077 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:01,078 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:39:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:39:01,090 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:39:01,141 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 03:39:01,141 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:39:01,141 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 03:39:01,141 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:39:01,142 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:39:01,142 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:39:01,142 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 03:39:01,143 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 5 states. [2018-01-21 03:39:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:39:01,248 INFO L93 Difference]: Finished difference Result 209 states and 225 transitions. [2018-01-21 03:39:01,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:39:01,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-01-21 03:39:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:39:01,249 INFO L225 Difference]: With dead ends: 209 [2018-01-21 03:39:01,250 INFO L226 Difference]: Without dead ends: 184 [2018-01-21 03:39:01,250 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 03:39:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-01-21 03:39:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2018-01-21 03:39:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-01-21 03:39:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2018-01-21 03:39:01,259 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 37 [2018-01-21 03:39:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:39:01,259 INFO L432 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2018-01-21 03:39:01,259 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:39:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2018-01-21 03:39:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-21 03:39:01,261 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:39:01,261 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, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:39:01,261 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 03:39:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 171442437, now seen corresponding path program 1 times [2018-01-21 03:39:01,261 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:39:01,262 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:01,262 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:39:01,263 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:39:01,263 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:39:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:39:01,283 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:39:01,438 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 03:39:01,439 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:39:01,439 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:39:01,440 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-01-21 03:39:01,442 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [14], [19], [23], [29], [32], [33], [47], [48], [49], [54], [55], [56], [62], [66], [72], [76], [78], [81], [173], [177], [182], [186], [194], [198], [200], [201], [202], [206], [210], [279], [284], [288], [294], [295], [301], [305], [307], [308], [309], [370], [372], [373], [374], [375], [379], [381], [382], [383], [384] [2018-01-21 03:39:01,500 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:39:01,500 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