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_preciseopt.epf -i ../../../trunk/examples/svcomp/memsafety-ext/tree_of_cslls_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:30:19,328 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:30:19,330 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:30:19,345 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:30:19,345 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:30:19,346 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:30:19,347 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:30:19,349 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:30:19,350 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:30:19,351 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:30:19,351 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:30:19,352 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:30:19,352 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:30:19,353 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:30:19,354 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:30:19,357 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:30:19,359 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:30:19,361 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:30:19,363 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:30:19,364 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:30:19,366 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:30:19,372 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_preciseopt.epf [2018-01-21 08:30:19,382 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:30:19,382 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:30:19,383 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:30:19,383 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:30:19,383 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:30:19,383 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:30:19,383 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:30:19,384 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:30:19,384 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:30:19,384 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:30:19,385 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:30:19,385 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:30:19,385 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:30:19,385 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:30:19,385 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:30:19,386 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:30:19,386 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:30:19,386 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:30:19,386 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:30:19,386 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:30:19,386 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:30:19,387 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:30:19,387 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:30:19,387 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:30:19,387 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:30:19,387 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:30:19,388 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:30:19,388 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:30:19,388 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:30:19,388 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:30:19,388 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:30:19,388 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:30:19,389 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:30:19,389 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:30:19,389 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:30:19,389 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:30:19,389 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:30:19,390 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:30:19,390 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:30:19,391 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:30:19,425 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:30:19,438 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:30:19,442 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:30:19,443 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:30:19,443 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:30:19,444 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety-ext/tree_of_cslls_true-valid-memsafety.i [2018-01-21 08:30:19,614 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:30:19,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:30:19,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:30:19,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:30:19,625 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:30:19,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e082f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19, skipping insertion in model container [2018-01-21 08:30:19,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,648 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:30:19,688 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:30:19,812 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:30:19,839 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:30:19,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19 WrapperNode [2018-01-21 08:30:19,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:30:19,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:30:19,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:30:19,852 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:30:19,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (1/1) ... [2018-01-21 08:30:19,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:30:19,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:30:19,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:30:19,890 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:30:19,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (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 08:30:19,938 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:30:19,939 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:30:19,939 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:30:19,939 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:30:19,940 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:30:19,940 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:30:19,940 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:30:20,376 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:30:20,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:30:20 BoogieIcfgContainer [2018-01-21 08:30:20,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:30:20,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:30:20,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:30:20,381 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:30:20,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:30:19" (1/3) ... [2018-01-21 08:30:20,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d072b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:30:20, skipping insertion in model container [2018-01-21 08:30:20,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:30:19" (2/3) ... [2018-01-21 08:30:20,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d072b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:30:20, skipping insertion in model container [2018-01-21 08:30:20,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:30:20" (3/3) ... [2018-01-21 08:30:20,386 INFO L105 eAbstractionObserver]: Analyzing ICFG tree_of_cslls_true-valid-memsafety.i [2018-01-21 08:30:20,395 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:30:20,404 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 08:30:20,452 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:30:20,452 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:30:20,452 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:30:20,452 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:30:20,452 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:30:20,453 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:30:20,453 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:30:20,453 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:30:20,454 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:30:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2018-01-21 08:30:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:30:20,482 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:20,483 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:30:20,484 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:30:20,488 INFO L82 PathProgramCache]: Analyzing trace with hash 262355, now seen corresponding path program 1 times [2018-01-21 08:30:20,490 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:20,531 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:20,532 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:20,532 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:20,532 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:30:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:30:20,584 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:30:20,590 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:30:20,597 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:30:20,598 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:30:20,598 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:30:20,598 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:30:20,598 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:30:20,598 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:30:20,599 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:30:20,599 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:30:20,599 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:30:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2018-01-21 08:30:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 08:30:20,605 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:20,605 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 08:30:20,605 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:30:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash -936424552, now seen corresponding path program 1 times [2018-01-21 08:30:20,605 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:20,606 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:20,606 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:20,606 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:20,607 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:30:20,641 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:30:20,772 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 08:30:20,774 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:30:20,775 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:30:20,775 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:30:20,778 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:30:20,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:30:20,792 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:30:20,794 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 2 states. [2018-01-21 08:30:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:30:20,824 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2018-01-21 08:30:20,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:30:20,825 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 08:30:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:30:20,839 INFO L225 Difference]: With dead ends: 216 [2018-01-21 08:30:20,839 INFO L226 Difference]: Without dead ends: 119 [2018-01-21 08:30:20,842 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 08:30:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-01-21 08:30:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-01-21 08:30:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-01-21 08:30:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2018-01-21 08:30:20,883 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 22 [2018-01-21 08:30:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:30:20,883 INFO L432 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2018-01-21 08:30:20,883 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:30:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2018-01-21 08:30:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 08:30:20,885 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:20,885 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 08:30:20,885 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:30:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1072713404, now seen corresponding path program 1 times [2018-01-21 08:30:20,885 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:20,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:20,887 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:20,887 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:20,887 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:30:20,909 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:30:20,983 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 08:30:20,983 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:30:20,984 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 08:30:20,984 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:30:20,986 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:30:20,986 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:30:20,986 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 08:30:20,987 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 4 states. [2018-01-21 08:30:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:30:21,052 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2018-01-21 08:30:21,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 08:30:21,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 08:30:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:30:21,054 INFO L225 Difference]: With dead ends: 161 [2018-01-21 08:30:21,054 INFO L226 Difference]: Without dead ends: 156 [2018-01-21 08:30:21,055 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 08:30:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-21 08:30:21,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-01-21 08:30:21,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-21 08:30:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2018-01-21 08:30:21,069 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 27 [2018-01-21 08:30:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:30:21,070 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2018-01-21 08:30:21,070 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:30:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2018-01-21 08:30:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 08:30:21,071 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:21,072 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:30:21,072 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:30:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1759311448, now seen corresponding path program 1 times [2018-01-21 08:30:21,072 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:21,073 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,073 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:21,073 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,073 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:30:21,100 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:30:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:30:21,147 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:30:21,148 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 08:30:21,148 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:30:21,148 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:30:21,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:30:21,149 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:30:21,149 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand 3 states. [2018-01-21 08:30:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:30:21,162 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2018-01-21 08:30:21,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:30:21,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2018-01-21 08:30:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:30:21,164 INFO L225 Difference]: With dead ends: 237 [2018-01-21 08:30:21,164 INFO L226 Difference]: Without dead ends: 158 [2018-01-21 08:30:21,165 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:30:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-01-21 08:30:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-01-21 08:30:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-01-21 08:30:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2018-01-21 08:30:21,174 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 44 [2018-01-21 08:30:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:30:21,174 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2018-01-21 08:30:21,174 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:30:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2018-01-21 08:30:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 08:30:21,176 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:21,177 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:30:21,177 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:30:21,177 INFO L82 PathProgramCache]: Analyzing trace with hash -512140811, now seen corresponding path program 1 times [2018-01-21 08:30:21,177 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:21,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,178 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:21,178 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,179 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:30:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:30:21,241 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:30:21,251 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:30:21,261 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:30:21,262 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:30:21,280 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:30:21,281 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:30:21,281 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:30:21,281 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:30:21,281 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:30:21,281 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:30:21,281 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:30:21,281 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:30:21,281 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:30:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2018-01-21 08:30:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 08:30:21,285 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:21,285 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] [2018-01-21 08:30:21,285 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:30:21,285 INFO L82 PathProgramCache]: Analyzing trace with hash -769688664, now seen corresponding path program 1 times [2018-01-21 08:30:21,285 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:21,286 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,286 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:21,287 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,287 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:30:21,296 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:30:21,309 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 08:30:21,309 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:30:21,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:30:21,309 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:30:21,310 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:30:21,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:30:21,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:30:21,310 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 2 states. [2018-01-21 08:30:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:30:21,317 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2018-01-21 08:30:21,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:30:21,317 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 08:30:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:30:21,319 INFO L225 Difference]: With dead ends: 216 [2018-01-21 08:30:21,319 INFO L226 Difference]: Without dead ends: 117 [2018-01-21 08:30:21,320 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 08:30:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-01-21 08:30:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-01-21 08:30:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-01-21 08:30:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2018-01-21 08:30:21,328 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 20 [2018-01-21 08:30:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:30:21,328 INFO L432 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2018-01-21 08:30:21,328 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:30:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2018-01-21 08:30:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 08:30:21,330 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:21,330 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 08:30:21,330 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:30:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -403350444, now seen corresponding path program 1 times [2018-01-21 08:30:21,330 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:21,331 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,331 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:21,331 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,331 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:30:21,340 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:30:21,379 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 08:30:21,380 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:30:21,380 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 08:30:21,380 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:30:21,380 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:30:21,380 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:30:21,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 08:30:21,381 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 4 states. [2018-01-21 08:30:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:30:21,450 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-01-21 08:30:21,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 08:30:21,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-01-21 08:30:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:30:21,453 INFO L225 Difference]: With dead ends: 157 [2018-01-21 08:30:21,453 INFO L226 Difference]: Without dead ends: 154 [2018-01-21 08:30:21,453 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 08:30:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-01-21 08:30:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-01-21 08:30:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-01-21 08:30:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 176 transitions. [2018-01-21 08:30:21,464 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 176 transitions. Word has length 25 [2018-01-21 08:30:21,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:30:21,464 INFO L432 AbstractCegarLoop]: Abstraction has 154 states and 176 transitions. [2018-01-21 08:30:21,465 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:30:21,465 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 176 transitions. [2018-01-21 08:30:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-01-21 08:30:21,467 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:21,467 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:30:21,467 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:30:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1941493352, now seen corresponding path program 1 times [2018-01-21 08:30:21,468 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:21,468 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,469 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:21,469 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,469 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:30:21,483 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:30:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:30:21,510 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:30:21,510 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 08:30:21,510 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:30:21,510 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:30:21,511 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:30:21,511 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:30:21,511 INFO L87 Difference]: Start difference. First operand 154 states and 176 transitions. Second operand 3 states. [2018-01-21 08:30:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:30:21,534 INFO L93 Difference]: Finished difference Result 233 states and 269 transitions. [2018-01-21 08:30:21,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:30:21,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2018-01-21 08:30:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:30:21,535 INFO L225 Difference]: With dead ends: 233 [2018-01-21 08:30:21,536 INFO L226 Difference]: Without dead ends: 156 [2018-01-21 08:30:21,536 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:30:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-01-21 08:30:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-01-21 08:30:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-01-21 08:30:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2018-01-21 08:30:21,544 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 42 [2018-01-21 08:30:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:30:21,544 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2018-01-21 08:30:21,545 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:30:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2018-01-21 08:30:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-01-21 08:30:21,546 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:30:21,546 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:30:21,546 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 08:30:21,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1818459461, now seen corresponding path program 1 times [2018-01-21 08:30:21,547 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:30:21,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,548 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:30:21,548 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:30:21,548 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:30:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:30:21,566 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:30:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:30:22,181 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:30:22,182 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:30:22,183 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-01-21 08:30:22,184 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [20], [22], [25], [42], [44], [47], [153], [157], [159], [163], [165], [166], [171], [172], [173], [177], [207], [211], [213], [214], [215], [218], [232], [233], [234], [235], [239], [241], [242], [243], [244] [2018-01-21 08:30:22,241 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:30:22,242 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