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_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 21:56:00,475 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 21:56:00,477 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 21:56:00,492 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 21:56:00,492 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 21:56:00,493 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 21:56:00,494 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 21:56:00,496 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 21:56:00,498 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 21:56:00,498 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 21:56:00,499 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 21:56:00,500 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 21:56:00,500 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 21:56:00,502 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 21:56:00,503 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 21:56:00,505 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 21:56:00,508 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 21:56:00,510 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 21:56:00,511 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 21:56:00,512 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 21:56:00,515 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 21:56:00,521 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-20 21:56:00,529 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 21:56:00,529 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 21:56:00,530 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 21:56:00,530 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 21:56:00,531 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 21:56:00,531 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 21:56:00,531 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 21:56:00,531 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 21:56:00,531 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 21:56:00,531 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 21:56:00,532 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 21:56:00,532 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 21:56:00,532 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 21:56:00,532 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 21:56:00,532 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 21:56:00,532 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 21:56:00,532 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 21:56:00,533 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 21:56:00,533 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 21:56:00,533 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 21:56:00,533 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 21:56:00,533 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 21:56:00,533 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 21:56:00,533 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 21:56:00,534 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 21:56:00,534 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 21:56:00,534 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 21:56:00,534 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 21:56:00,534 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 21:56:00,534 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 21:56:00,535 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 21:56:00,535 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-20 21:56:00,535 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 21:56:00,535 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 21:56:00,535 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 21:56:00,536 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 21:56:00,536 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 21:56:00,568 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 21:56:00,579 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 21:56:00,582 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 21:56:00,583 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 21:56:00,583 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 21:56:00,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 21:56:00,743 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 21:56:00,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 21:56:00,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 21:56:00,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 21:56:00,753 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 21:56:00,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,757 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 20.01 09:56:00, skipping insertion in model container [2018-01-20 21:56:00,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,770 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 21:56:00,808 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 21:56:00,924 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 21:56:00,940 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 21:56:00,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00 WrapperNode [2018-01-20 21:56:00,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 21:56:00,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 21:56:00,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 21:56:00,948 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 21:56:00,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (1/1) ... [2018-01-20 21:56:00,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 21:56:00,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 21:56:00,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 21:56:00,985 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 21:56:00,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (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 21:56:01,034 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 21:56:01,034 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 21:56:01,035 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcspn [2018-01-20 21:56:01,035 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcspn [2018-01-20 21:56:01,035 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 21:56:01,036 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 21:56:01,036 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 21:56:01,234 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 21:56:01,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 09:56:01 BoogieIcfgContainer [2018-01-20 21:56:01,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 21:56:01,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 21:56:01,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 21:56:01,237 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 21:56:01,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 09:56:00" (1/3) ... [2018-01-20 21:56:01,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386eed99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 09:56:01, skipping insertion in model container [2018-01-20 21:56:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 09:56:00" (2/3) ... [2018-01-20 21:56:01,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386eed99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 09:56:01, skipping insertion in model container [2018-01-20 21:56:01,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 09:56:01" (3/3) ... [2018-01-20 21:56:01,241 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 21:56:01,249 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 21:56:01,255 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 21:56:01,300 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:56:01,300 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:56:01,300 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:56:01,300 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:56:01,300 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:56:01,300 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:56:01,301 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:56:01,301 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 21:56:01,301 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:56:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 21:56:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 21:56:01,323 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:56:01,324 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 21:56:01,325 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 21:56:01,331 INFO L82 PathProgramCache]: Analyzing trace with hash 97063, now seen corresponding path program 1 times [2018-01-20 21:56:01,333 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:56:01,334 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:56:01,376 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,376 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:56:01,376 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:56:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:56:01,434 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 21:56:01,440 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:56:01,446 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:56:01,446 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:56:01,446 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:56:01,446 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:56:01,446 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:56:01,446 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:56:01,446 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:56:01,447 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrcspnErr0EnsuresViolation======== [2018-01-20 21:56:01,447 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:56:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 21:56:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-20 21:56:01,449 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:56:01,449 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 21:56:01,449 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcspnErr0EnsuresViolation]=== [2018-01-20 21:56:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash 945947687, now seen corresponding path program 1 times [2018-01-20 21:56:01,450 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:56:01,450 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:56:01,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,451 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:56:01,451 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:56:01,484 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:56:01,521 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 21:56:01,524 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:56:01,524 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 21:56:01,525 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 21:56:01,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 21:56:01,542 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 21:56:01,544 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 21:56:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:56:01,639 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-01-20 21:56:01,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 21:56:01,640 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-20 21:56:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:56:01,647 INFO L225 Difference]: With dead ends: 62 [2018-01-20 21:56:01,647 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 21:56:01,649 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 21:56:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 21:56:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 21:56:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 21:56:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 21:56:01,678 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-01-20 21:56:01,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:56:01,678 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 21:56:01,678 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 21:56:01,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 21:56:01,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 21:56:01,681 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:56:01,681 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:56:01,681 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:56:01,682 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:56:01,682 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:56:01,682 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:56:01,682 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:56:01,682 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 21:56:01,682 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:56:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 21:56:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-20 21:56:01,685 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:56:01,685 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 21:56:01,686 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 21:56:01,686 INFO L82 PathProgramCache]: Analyzing trace with hash 725300169, now seen corresponding path program 1 times [2018-01-20 21:56:01,686 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:56:01,686 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:56:01,687 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,687 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:56:01,687 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:56:01,704 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:56:01,730 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 21:56:01,730 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:56:01,730 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 21:56:01,731 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 21:56:01,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 21:56:01,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 21:56:01,731 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 21:56:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:56:01,737 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-01-20 21:56:01,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 21:56:01,737 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2018-01-20 21:56:01,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:56:01,741 INFO L225 Difference]: With dead ends: 62 [2018-01-20 21:56:01,742 INFO L226 Difference]: Without dead ends: 36 [2018-01-20 21:56:01,742 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 21:56:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-20 21:56:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-20 21:56:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-20 21:56:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-01-20 21:56:01,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2018-01-20 21:56:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:56:01,753 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-01-20 21:56:01,753 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 21:56:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-01-20 21:56:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 21:56:01,754 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:56:01,754 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] [2018-01-20 21:56:01,754 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 21:56:01,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1576766648, now seen corresponding path program 1 times [2018-01-20 21:56:01,754 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:56:01,754 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:56:01,755 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,755 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:56:01,756 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:56:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 21:56:01,841 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 21:56:01,849 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:56:01,855 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:56:01,856 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:56:01,856 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 21:56:01,863 WARN L312 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2018-01-20 21:56:01,867 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 21:56:01,867 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 21:56:01,867 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 21:56:01,867 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 21:56:01,867 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 21:56:01,867 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 21:56:01,867 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 21:56:01,868 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 21:56:01,868 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 21:56:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 21:56:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-20 21:56:01,870 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:56:01,871 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 21:56:01,871 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 21:56:01,871 INFO L82 PathProgramCache]: Analyzing trace with hash -736674615, now seen corresponding path program 1 times [2018-01-20 21:56:01,871 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:56:01,871 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:56:01,873 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,873 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:56:01,873 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:56:01,882 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:56:01,899 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 21:56:01,899 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:56:01,899 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 21:56:01,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 21:56:01,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 21:56:01,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 21:56:01,900 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 21:56:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:56:01,905 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2018-01-20 21:56:01,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 21:56:01,906 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2018-01-20 21:56:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:56:01,906 INFO L225 Difference]: With dead ends: 62 [2018-01-20 21:56:01,906 INFO L226 Difference]: Without dead ends: 34 [2018-01-20 21:56:01,907 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 21:56:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-20 21:56:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-20 21:56:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-20 21:56:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-01-20 21:56:01,913 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2018-01-20 21:56:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:56:01,914 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-01-20 21:56:01,914 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 21:56:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-01-20 21:56:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-20 21:56:01,915 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 21:56:01,915 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] [2018-01-20 21:56:01,915 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 21:56:01,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1415117448, now seen corresponding path program 1 times [2018-01-20 21:56:01,916 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-20 21:56:01,916 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-20 21:56:01,917 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,917 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 21:56:01,917 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 21:56:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 21:56:01,939 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 21:56:02,304 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 21:56:02,304 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 21:56:02,304 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-20 21:56:02,305 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 21:56:02,305 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 21:56:02,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-20 21:56:02,306 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2018-01-20 21:56:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 21:56:02,604 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-01-20 21:56:02,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 21:56:02,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-01-20 21:56:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 21:56:02,606 INFO L225 Difference]: With dead ends: 34 [2018-01-20 21:56:02,606 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 21:56:02,607 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-20 21:56:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 21:56:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 21:56:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 21:56:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 21:56:02,608 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2018-01-20 21:56:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 21:56:02,608 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 21:56:02,609 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 21:56:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 21:56:02,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 21:56:02,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 09:56:02 BoogieIcfgContainer [2018-01-20 21:56:02,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 21:56:02,613 INFO L168 Benchmark]: Toolchain (without parser) took 1869.61 ms. Allocated memory was 305.7 MB in the beginning and 467.1 MB in the end (delta: 161.5 MB). Free memory was 265.6 MB in the beginning and 355.3 MB in the end (delta: -89.7 MB). Peak memory consumption was 71.8 MB. Max. memory is 5.3 GB. [2018-01-20 21:56:02,615 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 305.7 MB. Free memory is still 271.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 21:56:02,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.12 ms. Allocated memory is still 305.7 MB. Free memory was 264.6 MB in the beginning and 254.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-20 21:56:02,616 INFO L168 Benchmark]: Boogie Preprocessor took 36.32 ms. Allocated memory is still 305.7 MB. Free memory was 254.5 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 21:56:02,616 INFO L168 Benchmark]: RCFGBuilder took 250.33 ms. Allocated memory is still 305.7 MB. Free memory was 252.5 MB in the beginning and 236.5 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 5.3 GB. [2018-01-20 21:56:02,616 INFO L168 Benchmark]: TraceAbstraction took 1376.89 ms. Allocated memory was 305.7 MB in the beginning and 467.1 MB in the end (delta: 161.5 MB). Free memory was 235.5 MB in the beginning and 355.3 MB in the end (delta: -119.7 MB). Peak memory consumption was 41.8 MB. Max. memory is 5.3 GB. [2018-01-20 21:56:02,618 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 305.7 MB. Free memory is still 271.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 199.12 ms. Allocated memory is still 305.7 MB. Free memory was 264.6 MB in the beginning and 254.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.32 ms. Allocated memory is still 305.7 MB. Free memory was 254.5 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 250.33 ms. Allocated memory is still 305.7 MB. Free memory was 252.5 MB in the beginning and 236.5 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1376.89 ms. Allocated memory was 305.7 MB in the beginning and 467.1 MB in the end (delta: 161.5 MB). Free memory was 235.5 MB in the beginning and 355.3 MB in the end (delta: -119.7 MB). Peak memory consumption was 41.8 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) - 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, 40 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=40occurred 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: cstrcspnErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 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=40occurred 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, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 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: [L555] int length1 = __VERIFIER_nondet_int(); [L556] int length2 = __VERIFIER_nondet_int(); [L557] COND FALSE !(length1 < 1) VAL [length1=3, length2=0] [L560] COND TRUE length2 < 1 [L561] length2 = 1 VAL [length1=3, length2=1] [L563] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, length1=3, length2=1] [L563] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, length1=3, length2=1, nondetString1={5:0}] [L564] EXPR, FCALL __builtin_alloca (length2 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}] [L564] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L565] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L566] FCALL nondetString2[length2-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L567] CALL, EXPR cstrcspn(nondetString1,nondetString2) VAL [s1={5:0}, s2={7:0}] [L543] const char *p, *spanp; [L544] char c, sc; [L545] p = s1 VAL [p={5:0}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L546] EXPR p++ VAL [p={5:1}, p++={5:0}, p++=0, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L546] c = *p++ [L547] spanp = s2 VAL [c=0, p={5:1}, p={7:0}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L549] EXPR spanp++ VAL [c=0, p={5:1}, p={7:1}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}, spanp++=0spanp++={7:0}] [L549] EXPR sc = *spanp++ VAL [c=0, c=0, p={5:1}, p={7:1}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}, spanp++={7:0}spanp++=0] [L549] COND TRUE (sc = *spanp++) == c [L550] RET return (p - 1 - s1); VAL [\result=0, c=0, c=0, p={7:1}, p={5:1}, s1={5:0}, s1={5:0}, s2={7:0}, s2={7:0}] [L567] EXPR cstrcspn(nondetString1,nondetString2) VAL [__builtin_alloca (length1 * sizeof(char))={5:0}, __builtin_alloca (length2 * sizeof(char))={7:0}, cstrcspn(nondetString1,nondetString2)=0, length1=3, length2=1, nondetString1={5:0}, nondetString2={7:0}] [L567] return cstrcspn(nondetString1,nondetString2); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 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=40occurred 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, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 676 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: 554]: 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, 40 locations, 4 error locations. SAFE Result, 0.7s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 68 SDtfs, 21 SDslu, 30 SDs, 0 SdLazy, 148 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 0.3s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 7210 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/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_21-56-02-630.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_21-56-02-630.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_21-56-02-630.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_21-56-02-630.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_21-56-02-630.csv Received shutdown request...