java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:24:18,296 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:24:18,298 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:24:18,311 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:24:18,312 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:24:18,313 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:24:18,314 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:24:18,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:24:18,317 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:24:18,318 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:24:18,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:24:18,319 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:24:18,320 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:24:18,320 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:24:18,321 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:24:18,323 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:24:18,326 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:24:18,328 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:24:18,330 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:24:18,331 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:24:18,333 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:24:18,339 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:24:18,339 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:24:18,340 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ.epf [2018-01-20 23:24:18,349 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:24:18,350 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:24:18,351 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:24:18,351 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:24:18,351 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:24:18,351 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:24:18,351 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:24:18,352 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:24:18,352 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:24:18,352 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:24:18,353 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:24:18,353 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:24:18,353 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:24:18,353 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:24:18,353 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:24:18,354 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:24:18,354 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:24:18,354 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:24:18,354 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:24:18,354 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:24:18,355 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:24:18,355 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:24:18,355 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:24:18,355 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:24:18,355 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:24:18,356 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:24:18,356 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:24:18,356 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:24:18,356 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:24:18,356 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:24:18,357 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:24:18,357 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:24:18,357 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:24:18,357 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:24:18,357 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:24:18,357 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:24:18,358 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:24:18,359 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:24:18,393 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:24:18,405 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:24:18,409 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:24:18,411 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:24:18,412 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:24:18,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:24:18,581 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:24:18,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:24:18,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:24:18,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:24:18,592 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:24:18,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4d1597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18, skipping insertion in model container [2018-01-20 23:24:18,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,611 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:24:18,651 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:24:18,771 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:24:18,788 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:24:18,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18 WrapperNode [2018-01-20 23:24:18,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:24:18,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:24:18,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:24:18,797 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:24:18,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (1/1) ... [2018-01-20 23:24:18,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:24:18,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:24:18,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:24:18,834 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:24:18,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (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 [2018-01-20 23:24:18,884 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:24:18,884 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:24:18,884 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-01-20 23:24:18,884 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:24:18,884 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:24:18,885 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:24:19,029 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:24:19,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:24:19 BoogieIcfgContainer [2018-01-20 23:24:19,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:24:19,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:24:19,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:24:19,032 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:24:19,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:24:18" (1/3) ... [2018-01-20 23:24:19,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10de6206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:24:19, skipping insertion in model container [2018-01-20 23:24:19,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:18" (2/3) ... [2018-01-20 23:24:19,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10de6206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:24:19, skipping insertion in model container [2018-01-20 23:24:19,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:24:19" (3/3) ... [2018-01-20 23:24:19,034 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:24:19,040 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:24:19,045 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 23:24:19,090 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:19,090 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:19,090 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:19,090 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:19,090 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:19,091 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:19,091 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:19,091 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:24:19,091 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-20 23:24:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:24:19,115 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:19,116 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:24:19,116 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:24:19,121 INFO L82 PathProgramCache]: Analyzing trace with hash 69194, now seen corresponding path program 1 times [2018-01-20 23:24:19,123 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:19,176 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,176 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:19,176 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,176 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:19,230 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:24:19,236 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:19,242 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:19,242 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:19,242 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:19,243 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:19,243 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:19,243 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:19,243 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:19,243 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrlenErr0EnsuresViolation======== [2018-01-20 23:24:19,243 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-20 23:24:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-20 23:24:19,246 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:19,246 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:19,246 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr0EnsuresViolation]=== [2018-01-20 23:24:19,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1765539224, now seen corresponding path program 1 times [2018-01-20 23:24:19,247 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:19,248 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,249 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:19,249 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,249 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:19,282 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:19,317 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:19,318 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:19,318 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:19,319 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:19,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:19,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:19,333 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-20 23:24:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:19,433 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-20 23:24:19,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:19,435 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-20 23:24:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:19,442 INFO L225 Difference]: With dead ends: 41 [2018-01-20 23:24:19,443 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:24:19,446 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 [2018-01-20 23:24:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:24:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:24:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:24:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:24:19,466 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-20 23:24:19,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:19,467 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:24:19,467 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:24:19,467 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:24:19,469 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:19,469 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:19,469 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:19,469 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:19,469 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:19,470 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:19,470 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:19,470 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:24:19,470 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-20 23:24:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-20 23:24:19,472 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:19,472 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:19,472 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:24:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1402415957, now seen corresponding path program 1 times [2018-01-20 23:24:19,472 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:19,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,473 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:19,473 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,473 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:19,485 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:19,504 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:19,504 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:19,504 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:19,505 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:19,505 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:19,505 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:19,505 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-20 23:24:19,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:19,509 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-20 23:24:19,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:19,509 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-20 23:24:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:19,513 INFO L225 Difference]: With dead ends: 41 [2018-01-20 23:24:19,513 INFO L226 Difference]: Without dead ends: 25 [2018-01-20 23:24:19,514 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 [2018-01-20 23:24:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-01-20 23:24:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-01-20 23:24:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-01-20 23:24:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-01-20 23:24:19,523 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-01-20 23:24:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:19,524 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-01-20 23:24:19,524 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-01-20 23:24:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-20 23:24:19,524 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:19,525 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:19,525 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:24:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1447957179, now seen corresponding path program 1 times [2018-01-20 23:24:19,525 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:19,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,526 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:19,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,526 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:19,570 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:24:19,576 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:19,577 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:19,578 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:19,578 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:19,585 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:19,586 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:19,586 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:19,586 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:19,586 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:19,586 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:19,586 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:19,586 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 23:24:19,586 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-01-20 23:24:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-20 23:24:19,588 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:19,588 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:19,588 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 23:24:19,588 INFO L82 PathProgramCache]: Analyzing trace with hash 533302314, now seen corresponding path program 1 times [2018-01-20 23:24:19,588 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:19,589 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,589 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:19,589 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,589 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:19,599 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:19,613 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:19,613 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:19,613 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:19,613 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:19,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:19,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:19,614 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-01-20 23:24:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:19,617 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-01-20 23:24:19,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:19,618 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-20 23:24:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:19,619 INFO L225 Difference]: With dead ends: 41 [2018-01-20 23:24:19,619 INFO L226 Difference]: Without dead ends: 23 [2018-01-20 23:24:19,619 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 [2018-01-20 23:24:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-01-20 23:24:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-01-20 23:24:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-01-20 23:24:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-01-20 23:24:19,623 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-01-20 23:24:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:19,624 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-01-20 23:24:19,624 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-01-20 23:24:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-20 23:24:19,624 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:19,625 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:19,625 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 23:24:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash -910224112, now seen corresponding path program 1 times [2018-01-20 23:24:19,625 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:19,626 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,626 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:19,626 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:19,626 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:19,639 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-20 23:24:19,755 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:19,755 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-20 23:24:19,755 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:19,755 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-20 23:24:19,756 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-20 23:24:19,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-20 23:24:19,756 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2018-01-20 23:24:19,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:19,816 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-01-20 23:24:19,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-20 23:24:19,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-01-20 23:24:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:19,817 INFO L225 Difference]: With dead ends: 23 [2018-01-20 23:24:19,817 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:24:19,818 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-20 23:24:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:24:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:24:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:24:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:24:19,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-20 23:24:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:19,819 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:24:19,819 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-20 23:24:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:24:19,820 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:24:19,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:24:19 BoogieIcfgContainer [2018-01-20 23:24:19,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 23:24:19,824 INFO L168 Benchmark]: Toolchain (without parser) took 1242.19 ms. Allocated memory was 306.7 MB in the beginning and 468.2 MB in the end (delta: 161.5 MB). Free memory was 262.0 MB in the beginning and 407.6 MB in the end (delta: -145.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:19,825 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 306.7 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:24:19,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.66 ms. Allocated memory is still 306.7 MB. Free memory was 262.0 MB in the beginning and 252.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:19,826 INFO L168 Benchmark]: Boogie Preprocessor took 36.64 ms. Allocated memory is still 306.7 MB. Free memory was 252.1 MB in the beginning and 250.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:19,826 INFO L168 Benchmark]: RCFGBuilder took 195.96 ms. Allocated memory is still 306.7 MB. Free memory was 250.1 MB in the beginning and 237.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:19,826 INFO L168 Benchmark]: TraceAbstraction took 792.70 ms. Allocated memory was 306.7 MB in the beginning and 468.2 MB in the end (delta: 161.5 MB). Free memory was 237.2 MB in the beginning and 407.6 MB in the end (delta: -170.4 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:24:19,828 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 306.7 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 209.66 ms. Allocated memory is still 306.7 MB. Free memory was 262.0 MB in the beginning and 252.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.64 ms. Allocated memory is still 306.7 MB. Free memory was 252.1 MB in the beginning and 250.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 195.96 ms. Allocated memory is still 306.7 MB. Free memory was 250.1 MB in the beginning and 237.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 792.70 ms. Allocated memory was 306.7 MB in the beginning and 468.2 MB in the end (delta: 161.5 MB). Free memory was 237.2 MB in the beginning and 407.6 MB in the end (delta: -170.4 MB). There was no memory consumed. 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) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - 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, 29 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=29occurred 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: cstrlenErr0EnsuresViolation CFG has 4 procedures, 29 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L548] int length1 = __VERIFIER_nondet_int(); [L549] COND TRUE length1 < 1 [L550] length1 = 1 VAL [length1=1] [L552] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1] [L552] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1, nondetString1={2:0}] [L553] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, length1=1, nondetString1={2:0}] [L554] CALL, EXPR cstrlen(nondetString1) VAL [s={2:0}] [L542] const char *p = s; VAL [p={2:0}, s={2:0}, s={2:0}] [L543] EXPR, FCALL \read(*p) VAL [\read(*p)=0, p={2:0}, s={2:0}, s={2:0}] [L543] COND FALSE !(*p != '\0') [L545] RET return (int)(p - s); VAL [\result=0, p={2:0}, s={2:0}, s={2:0}] [L554] EXPR cstrlen(nondetString1) VAL [__builtin_alloca (length1 * sizeof(char))={2:0}, cstrlen(nondetString1)=0, length1=1, nondetString1={2:0}] [L554] return cstrlen(nondetString1); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 29 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 547]: 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: mainErr0EnsuresViolation CFG has 4 procedures, 29 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 8 SDslu, 5 SDs, 0 SdLazy, 24 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 2104 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 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_23-24-19-838.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_23-24-19-838.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_23-24-19-838.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_23-24-19-838.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_23-24-19-838.csv Received shutdown request...