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/array-memsafety/lis-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:50:08,025 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:50:08,026 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:50:08,042 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:50:08,043 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:50:08,044 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:50:08,045 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:50:08,046 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:50:08,048 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:50:08,049 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:50:08,050 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:50:08,051 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:50:08,052 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:50:08,053 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:50:08,054 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:50:08,057 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:50:08,059 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:50:08,061 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:50:08,063 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:50:08,064 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:50:08,067 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:50:08,073 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 02:50:08,083 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:50:08,084 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:50:08,084 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:50:08,085 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:50:08,085 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:50:08,085 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:50:08,085 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:50:08,085 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:50:08,085 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:50:08,086 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:50:08,086 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:50:08,086 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:50:08,086 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:50:08,086 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:50:08,087 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:50:08,088 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:50:08,088 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:50:08,088 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:50:08,088 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:50:08,088 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:50:08,089 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:50:08,089 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:50:08,089 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:50:08,089 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:50:08,089 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:50:08,089 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:50:08,089 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:50:08,090 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:50:08,090 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:50:08,090 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:50:08,090 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:50:08,091 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:50:08,091 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:50:08,125 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:50:08,136 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:50:08,139 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:50:08,141 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:50:08,141 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:50:08,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/lis-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:50:08,347 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:50:08,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:50:08,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:50:08,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:50:08,359 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:50:08,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7344226a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08, skipping insertion in model container [2018-01-21 02:50:08,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,378 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:50:08,416 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:50:08,540 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:50:08,563 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:50:08,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08 WrapperNode [2018-01-21 02:50:08,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:50:08,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:50:08,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:50:08,574 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:50:08,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (1/1) ... [2018-01-21 02:50:08,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:50:08,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:50:08,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:50:08,616 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:50:08,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (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 02:50:08,675 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:50:08,675 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:50:08,675 INFO L136 BoogieDeclarations]: Found implementation of procedure lis [2018-01-21 02:50:08,676 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure lis [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:50:08,676 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:50:08,677 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:50:09,081 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:50:09,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:50:09 BoogieIcfgContainer [2018-01-21 02:50:09,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:50:09,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:50:09,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:50:09,085 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:50:09,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:50:08" (1/3) ... [2018-01-21 02:50:09,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5defa2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:50:09, skipping insertion in model container [2018-01-21 02:50:09,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:08" (2/3) ... [2018-01-21 02:50:09,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5defa2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:50:09, skipping insertion in model container [2018-01-21 02:50:09,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:50:09" (3/3) ... [2018-01-21 02:50:09,089 INFO L105 eAbstractionObserver]: Analyzing ICFG lis-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:50:09,096 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:50:09,103 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 02:50:09,207 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:50:09,207 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:50:09,208 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:50:09,208 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:50:09,208 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:50:09,208 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:50:09,208 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:50:09,209 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:50:09,210 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:50:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 02:50:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:50:09,268 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:09,270 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:50:09,270 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:50:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash 147035, now seen corresponding path program 1 times [2018-01-21 02:50:09,278 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:09,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:09,326 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:09,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:09,327 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:50:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:50:09,426 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:50:09,434 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:50:09,441 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:50:09,442 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:50:09,442 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:50:09,442 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:50:09,442 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:50:09,442 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:50:09,442 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:50:09,442 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == lisErr0EnsuresViolation======== [2018-01-21 02:50:09,443 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:50:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 02:50:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 02:50:09,448 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:09,448 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] [2018-01-21 02:50:09,449 INFO L371 AbstractCegarLoop]: === Iteration 1 === [lisErr0EnsuresViolation]=== [2018-01-21 02:50:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash -532715498, now seen corresponding path program 1 times [2018-01-21 02:50:09,449 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:09,450 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:09,451 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:09,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:09,451 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:09,490 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:50:09,550 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 02:50:09,552 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:09,552 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:50:09,552 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:09,555 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:50:09,567 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:50:09,568 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:50:09,571 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2018-01-21 02:50:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:09,662 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2018-01-21 02:50:09,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:50:09,664 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 02:50:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:09,673 INFO L225 Difference]: With dead ends: 109 [2018-01-21 02:50:09,673 INFO L226 Difference]: Without dead ends: 54 [2018-01-21 02:50:09,718 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 02:50:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-21 02:50:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-21 02:50:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 02:50:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2018-01-21 02:50:09,750 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 26 [2018-01-21 02:50:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:09,750 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2018-01-21 02:50:09,751 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:50:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2018-01-21 02:50:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 02:50:09,752 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:09,752 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] [2018-01-21 02:50:09,752 INFO L371 AbstractCegarLoop]: === Iteration 2 === [lisErr0EnsuresViolation]=== [2018-01-21 02:50:09,752 INFO L82 PathProgramCache]: Analyzing trace with hash 200361856, now seen corresponding path program 1 times [2018-01-21 02:50:09,752 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:09,753 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:09,753 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:09,753 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:09,753 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:09,781 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:50:09,898 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 02:50:09,898 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:09,898 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 02:50:09,898 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:09,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 02:50:09,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 02:50:09,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 02:50:09,901 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 6 states. [2018-01-21 02:50:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:10,075 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2018-01-21 02:50:10,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 02:50:10,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-01-21 02:50:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:10,077 INFO L225 Difference]: With dead ends: 100 [2018-01-21 02:50:10,078 INFO L226 Difference]: Without dead ends: 66 [2018-01-21 02:50:10,079 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-21 02:50:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-21 02:50:10,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2018-01-21 02:50:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-21 02:50:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2018-01-21 02:50:10,088 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 29 [2018-01-21 02:50:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:10,089 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2018-01-21 02:50:10,089 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 02:50:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2018-01-21 02:50:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 02:50:10,091 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:10,091 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] [2018-01-21 02:50:10,091 INFO L371 AbstractCegarLoop]: === Iteration 3 === [lisErr0EnsuresViolation]=== [2018-01-21 02:50:10,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1926411264, now seen corresponding path program 1 times [2018-01-21 02:50:10,091 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:10,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,093 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:10,093 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,093 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:10,128 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:50:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 02:50:10,421 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:10,421 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 02:50:10,421 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:10,422 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 02:50:10,422 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 02:50:10,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 02:50:10,423 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 7 states. [2018-01-21 02:50:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:10,501 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-01-21 02:50:10,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 02:50:10,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-01-21 02:50:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:10,502 INFO L225 Difference]: With dead ends: 58 [2018-01-21 02:50:10,502 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 02:50:10,502 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-21 02:50:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 02:50:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 02:50:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 02:50:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 02:50:10,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-21 02:50:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:10,504 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 02:50:10,504 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 02:50:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 02:50:10,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 02:50:10,507 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:50:10,507 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:50:10,507 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:50:10,507 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:50:10,507 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:50:10,507 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:50:10,507 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:50:10,507 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:50:10,507 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:50:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 02:50:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 02:50:10,510 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:10,510 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:10,510 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:10,511 INFO L82 PathProgramCache]: Analyzing trace with hash 925461465, now seen corresponding path program 1 times [2018-01-21 02:50:10,511 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:10,512 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,512 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:10,512 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,512 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:10,524 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:50:10,538 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 02:50:10,538 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:10,539 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 02:50:10,539 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:10,539 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 02:50:10,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 02:50:10,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 02:50:10,540 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2018-01-21 02:50:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:10,546 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2018-01-21 02:50:10,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 02:50:10,547 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2018-01-21 02:50:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:10,548 INFO L225 Difference]: With dead ends: 109 [2018-01-21 02:50:10,548 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 02:50:10,549 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 02:50:10,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 02:50:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-21 02:50:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-21 02:50:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2018-01-21 02:50:10,555 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 33 [2018-01-21 02:50:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:10,556 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2018-01-21 02:50:10,556 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 02:50:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2018-01-21 02:50:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 02:50:10,557 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:10,557 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] [2018-01-21 02:50:10,557 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -609533649, now seen corresponding path program 1 times [2018-01-21 02:50:10,557 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:10,558 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,558 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:10,559 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,559 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:10,575 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:50:10,628 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 02:50:10,628 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:10,628 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 02:50:10,628 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:10,629 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 02:50:10,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 02:50:10,629 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 02:50:10,629 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 6 states. [2018-01-21 02:50:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:10,813 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2018-01-21 02:50:10,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 02:50:10,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-21 02:50:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:10,816 INFO L225 Difference]: With dead ends: 128 [2018-01-21 02:50:10,816 INFO L226 Difference]: Without dead ends: 73 [2018-01-21 02:50:10,817 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-21 02:50:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-21 02:50:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2018-01-21 02:50:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-21 02:50:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2018-01-21 02:50:10,824 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 36 [2018-01-21 02:50:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:10,824 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2018-01-21 02:50:10,825 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 02:50:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2018-01-21 02:50:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 02:50:10,826 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:10,826 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:10,826 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:10,827 INFO L82 PathProgramCache]: Analyzing trace with hash 355386543, now seen corresponding path program 1 times [2018-01-21 02:50:10,827 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:10,828 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,828 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:10,828 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:10,828 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:10,856 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 02:50:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 02:50:11,415 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:11,415 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 02:50:11,416 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-21 02:50:11,419 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [4], [5], [6], [7], [11], [14], [16], [17], [18], [20], [24], [28], [31], [73], [77], [80], [82], [83], [90], [92], [96], [97], [98], [99], [100], [101], [106], [107], [112], [114], [115], [117], [118], [119], [120], [122], [123], [124], [125], [126], [127] [2018-01-21 02:50:11,468 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:50:11,469 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-21 02:51:11,449 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-21 02:51:11,450 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-21 02:51:11,451 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 02:51:11,451 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:51:11,451 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:51:11,460 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:51:11,460 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:51:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:51:11,496 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:51:11,520 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 02:51:11,521 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 02:51:11,525 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:51:11,525 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:51:11,525 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:51:11,525 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:51:11,526 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:51:11,526 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:51:11,526 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:51:11,526 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 02:51:11,526 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:51:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 02:51:11,528 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 02:51:11,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 02:51:11 BoogieIcfgContainer [2018-01-21 02:51:11,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 02:51:11,531 INFO L168 Benchmark]: Toolchain (without parser) took 63183.20 ms. Allocated memory was 309.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 267.0 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 497.5 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:11,532 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 309.9 MB. Free memory is still 273.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 02:51:11,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.23 ms. Allocated memory is still 309.9 MB. Free memory was 267.0 MB in the beginning and 257.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:11,533 INFO L168 Benchmark]: Boogie Preprocessor took 42.08 ms. Allocated memory is still 309.9 MB. Free memory was 257.0 MB in the beginning and 255.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:11,534 INFO L168 Benchmark]: RCFGBuilder took 466.64 ms. Allocated memory is still 309.9 MB. Free memory was 255.1 MB in the beginning and 234.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:11,534 INFO L168 Benchmark]: TraceAbstraction took 62446.60 ms. Allocated memory was 309.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 234.1 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 464.6 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:11,536 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 309.9 MB. Free memory is still 273.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 220.23 ms. Allocated memory is still 309.9 MB. Free memory was 267.0 MB in the beginning and 257.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 42.08 ms. Allocated memory is still 309.9 MB. Free memory was 257.0 MB in the beginning and 255.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 466.64 ms. Allocated memory is still 309.9 MB. Free memory was 255.1 MB in the beginning and 234.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 62446.60 ms. Allocated memory was 309.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 234.1 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 464.6 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 4 procedures, 65 locations, 4 error locations. UNSAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: lisErr0EnsuresViolation CFG has 4 procedures, 65 locations, 4 error locations. SAFE Result, 1.0s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 169 SDtfs, 155 SDslu, 223 SDs, 0 SdLazy, 110 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 15645 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 47 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 65 locations, 4 error locations. TIMEOUT Result, 61.0s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 124 SDtfs, 175 SDslu, 134 SDs, 0 SdLazy, 75 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 60.0s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 4069 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 556]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 556). Cancelled while IsEmpty was searching accepting run (input had 65 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 4 procedures, 65 locations, 4 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lis-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_02-51-11-550.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lis-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_02-51-11-550.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lis-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_02-51-11-550.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lis-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_02-51-11-550.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lis-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_02-51-11-550.csv Completed graceful shutdown