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_precise.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 05:34:30,022 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:34:30,024 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:34:30,038 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:34:30,038 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:34:30,039 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:34:30,041 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:34:30,043 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:34:30,046 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:34:30,047 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:34:30,048 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:34:30,048 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:34:30,049 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:34:30,050 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:34:30,051 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:34:30,054 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:34:30,056 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:34:30,059 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:34:30,060 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:34:30,061 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:34:30,064 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:34:30,070 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_precise.epf [2018-01-21 05:34:30,081 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:34:30,081 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:34:30,082 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:34:30,082 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:34:30,083 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:34:30,083 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:34:30,083 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:34:30,083 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:34:30,084 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:34:30,084 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:34:30,084 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:34:30,162 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:34:30,162 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:34:30,163 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:34:30,163 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:34:30,163 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:34:30,163 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:34:30,163 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:34:30,163 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:34:30,163 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:34:30,164 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:34:30,164 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:34:30,164 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:34:30,164 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:34:30,164 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:34:30,164 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:34:30,164 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:34:30,165 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:34:30,165 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:34:30,165 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:34:30,165 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:34:30,165 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:34:30,165 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:34:30,165 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:34:30,165 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:34:30,166 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:34:30,166 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:34:30,167 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:34:30,167 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:34:30,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:34:30,211 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:34:30,214 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:34:30,215 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:34:30,216 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:34:30,216 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/lis-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:34:30,383 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:34:30,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:34:30,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:34:30,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:34:30,393 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:34:30,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa56ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30, skipping insertion in model container [2018-01-21 05:34:30,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,409 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:34:30,446 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:34:30,565 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:34:30,587 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:34:30,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30 WrapperNode [2018-01-21 05:34:30,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:34:30,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:34:30,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:34:30,598 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:34:30,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (1/1) ... [2018-01-21 05:34:30,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:34:30,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:34:30,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:34:30,638 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:34:30,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (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 05:34:30,686 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:34:30,686 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:34:30,686 INFO L136 BoogieDeclarations]: Found implementation of procedure lis [2018-01-21 05:34:30,686 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:34:30,686 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:34:30,686 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure lis [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:34:30,687 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:34:30,894 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:34:30,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:34:30 BoogieIcfgContainer [2018-01-21 05:34:30,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:34:30,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:34:30,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:34:30,897 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:34:30,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:34:30" (1/3) ... [2018-01-21 05:34:30,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f79df69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:34:30, skipping insertion in model container [2018-01-21 05:34:30,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:34:30" (2/3) ... [2018-01-21 05:34:30,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f79df69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:34:30, skipping insertion in model container [2018-01-21 05:34:30,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:34:30" (3/3) ... [2018-01-21 05:34:30,900 INFO L105 eAbstractionObserver]: Analyzing ICFG lis-alloca_true-valid-memsafety_true-termination.i [2018-01-21 05:34:30,906 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:34:30,912 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 05:34:30,961 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:34:30,962 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:34:30,962 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:34:30,962 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:34:30,962 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:34:30,962 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:34:30,962 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:34:30,963 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:34:30,963 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:34:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 05:34:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:34:30,990 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:30,991 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:34:30,992 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:34:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 147035, now seen corresponding path program 1 times [2018-01-21 05:34:30,999 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:31,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:31,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,046 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:34:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:34:31,094 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:34:31,100 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:34:31,107 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:34:31,108 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:34:31,108 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:34:31,108 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:34:31,108 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:34:31,108 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:34:31,109 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:34:31,109 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == lisErr0EnsuresViolation======== [2018-01-21 05:34:31,109 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:34:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 05:34:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 05:34:31,113 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:31,113 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 05:34:31,113 INFO L371 AbstractCegarLoop]: === Iteration 1 === [lisErr0EnsuresViolation]=== [2018-01-21 05:34:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash -532715498, now seen corresponding path program 1 times [2018-01-21 05:34:31,113 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:31,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,114 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:31,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,114 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:31,146 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:34:31,199 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 05:34:31,201 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:31,201 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:34:31,202 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:31,204 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:34:31,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:34:31,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:34:31,297 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2018-01-21 05:34:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:31,318 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2018-01-21 05:34:31,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:34:31,320 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 05:34:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:31,329 INFO L225 Difference]: With dead ends: 109 [2018-01-21 05:34:31,329 INFO L226 Difference]: Without dead ends: 54 [2018-01-21 05:34:31,332 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 05:34:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-21 05:34:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-21 05:34:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 05:34:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2018-01-21 05:34:31,361 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 26 [2018-01-21 05:34:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:31,361 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2018-01-21 05:34:31,361 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:34:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2018-01-21 05:34:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 05:34:31,362 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:31,362 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 05:34:31,362 INFO L371 AbstractCegarLoop]: === Iteration 2 === [lisErr0EnsuresViolation]=== [2018-01-21 05:34:31,363 INFO L82 PathProgramCache]: Analyzing trace with hash 200361856, now seen corresponding path program 1 times [2018-01-21 05:34:31,363 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:31,364 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,364 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:31,364 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,364 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:31,389 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:34:31,537 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 05:34:31,538 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:31,538 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 05:34:31,538 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:31,540 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:34:31,540 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:34:31,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:34:31,541 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 6 states. [2018-01-21 05:34:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:31,687 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2018-01-21 05:34:31,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 05:34:31,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-01-21 05:34:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:31,689 INFO L225 Difference]: With dead ends: 100 [2018-01-21 05:34:31,689 INFO L226 Difference]: Without dead ends: 66 [2018-01-21 05:34:31,690 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:34:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-21 05:34:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2018-01-21 05:34:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-21 05:34:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2018-01-21 05:34:31,697 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 29 [2018-01-21 05:34:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:31,698 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2018-01-21 05:34:31,698 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:34:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2018-01-21 05:34:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 05:34:31,699 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:31,699 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 05:34:31,699 INFO L371 AbstractCegarLoop]: === Iteration 3 === [lisErr0EnsuresViolation]=== [2018-01-21 05:34:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1926411264, now seen corresponding path program 1 times [2018-01-21 05:34:31,699 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:31,700 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,701 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:31,701 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:31,701 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:31,735 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:34:32,016 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 05:34:32,016 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:32,016 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 05:34:32,016 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:32,017 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 05:34:32,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 05:34:32,017 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:34:32,018 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 7 states. [2018-01-21 05:34:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:32,137 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-01-21 05:34:32,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 05:34:32,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-01-21 05:34:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:32,138 INFO L225 Difference]: With dead ends: 58 [2018-01-21 05:34:32,138 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:34:32,138 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 05:34:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:34:32,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:34:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:34:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:34:32,139 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-21 05:34:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:32,139 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:34:32,140 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 05:34:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:34:32,140 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:34:32,142 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:34:32,142 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:34:32,142 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:34:32,143 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:34:32,143 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:34:32,143 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:34:32,143 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:34:32,143 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:34:32,143 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:34:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 05:34:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 05:34:32,146 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:32,146 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 05:34:32,146 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash 925461465, now seen corresponding path program 1 times [2018-01-21 05:34:32,146 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:32,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:32,147 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:32,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:32,147 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:32,160 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:34:32,174 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 05:34:32,174 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:32,174 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:34:32,174 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:32,175 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:34:32,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:34:32,175 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:34:32,175 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 2 states. [2018-01-21 05:34:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:32,180 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2018-01-21 05:34:32,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:34:32,180 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 33 [2018-01-21 05:34:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:32,181 INFO L225 Difference]: With dead ends: 109 [2018-01-21 05:34:32,181 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 05:34:32,182 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 05:34:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 05:34:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-01-21 05:34:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-01-21 05:34:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2018-01-21 05:34:32,187 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 33 [2018-01-21 05:34:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:32,187 INFO L432 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2018-01-21 05:34:32,187 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:34:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2018-01-21 05:34:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 05:34:32,189 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:32,189 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 05:34:32,189 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -609533649, now seen corresponding path program 1 times [2018-01-21 05:34:32,189 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:32,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:32,190 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:32,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:32,190 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:32,202 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:34:32,252 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 05:34:32,252 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:34:32,252 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 05:34:32,252 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:34:32,253 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:34:32,253 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:34:32,253 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:34:32,253 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 6 states. [2018-01-21 05:34:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:34:32,404 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2018-01-21 05:34:32,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 05:34:32,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-01-21 05:34:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:34:32,406 INFO L225 Difference]: With dead ends: 128 [2018-01-21 05:34:32,406 INFO L226 Difference]: Without dead ends: 73 [2018-01-21 05:34:32,407 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 05:34:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-21 05:34:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2018-01-21 05:34:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-21 05:34:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2018-01-21 05:34:32,413 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 36 [2018-01-21 05:34:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:34:32,413 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2018-01-21 05:34:32,413 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:34:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2018-01-21 05:34:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 05:34:32,414 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:34:32,414 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 05:34:32,414 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:34:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash 355386543, now seen corresponding path program 1 times [2018-01-21 05:34:32,415 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:34:32,415 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:32,415 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:34:32,416 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:34:32,416 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:34:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:34:32,435 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:34:33,070 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 05:34:33,071 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:34:33,071 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:34:33,072 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-21 05:34:33,073 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 05:34:33,132 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:34:33,132 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-21 05:35:32,699 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-21 05:35:32,700 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-21 05:35:32,700 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:35:32,701 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:35:32,701 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 05:35:32,711 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:35:32,712 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:35:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:35:32,742 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:35:32,752 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 05:35:32,752 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 05:35:32,755 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:35:32,755 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:35:32,755 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:35:32,755 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:35:32,755 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:35:32,756 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:35:32,756 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:35:32,756 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 05:35:32,756 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:35:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2018-01-21 05:35:32,757 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 05:35:32,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 05:35:32 BoogieIcfgContainer [2018-01-21 05:35:32,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 05:35:32,759 INFO L168 Benchmark]: Toolchain (without parser) took 62375.68 ms. Allocated memory was 309.9 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 268.2 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 669.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:32,760 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 309.9 MB. Free memory is still 274.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 05:35:32,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.98 ms. Allocated memory is still 309.9 MB. Free memory was 267.2 MB in the beginning and 257.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:32,761 INFO L168 Benchmark]: Boogie Preprocessor took 39.56 ms. Allocated memory is still 309.9 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:32,761 INFO L168 Benchmark]: RCFGBuilder took 256.49 ms. Allocated memory is still 309.9 MB. Free memory was 255.2 MB in the beginning and 235.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:32,761 INFO L168 Benchmark]: TraceAbstraction took 61863.19 ms. Allocated memory was 309.9 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 234.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 635.4 MB. Max. memory is 5.3 GB. [2018-01-21 05:35:32,763 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 309.9 MB. Free memory is still 274.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 209.98 ms. Allocated memory is still 309.9 MB. Free memory was 267.2 MB in the beginning and 257.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 39.56 ms. Allocated memory is still 309.9 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 256.49 ms. Allocated memory is still 309.9 MB. Free memory was 255.2 MB in the beginning and 235.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 61863.19 ms. Allocated memory was 309.9 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 234.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 635.4 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, 0.1s 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, 0.3s 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, 60.6s 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, 59.6s 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_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_05-35-32-773.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_05-35-32-773.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_05-35-32-773.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_05-35-32-773.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_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_05-35-32-773.csv Completed graceful shutdown