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/cstrcspn-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:24:16,597 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:24:16,599 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:24:16,611 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:24:16,611 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:24:16,612 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:24:16,613 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:24:16,615 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:24:16,617 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:24:16,617 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:24:16,618 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:24:16,618 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:24:16,619 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:24:16,621 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:24:16,622 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:24:16,624 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:24:16,626 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:24:16,628 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:24:16,630 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:24:16,631 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:24:16,633 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:24:16,638 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:24:16,639 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:24:16,639 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 23:24:16,648 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:24:16,649 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:24:16,650 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:24:16,650 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:24:16,650 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:24:16,650 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:24:16,650 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:24:16,651 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:24:16,651 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:24:16,651 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:24:16,652 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:24:16,652 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:24:16,652 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:24:16,652 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:24:16,652 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:24:16,653 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:24:16,653 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:24:16,653 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:24:16,653 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:24:16,653 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:24:16,654 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:24:16,654 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:24:16,654 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:24:16,654 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:24:16,654 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:24:16,655 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:24:16,655 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:24:16,655 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:24:16,655 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:24:16,655 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:24:16,655 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:24:16,656 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:24:16,656 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:24:16,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:24:16,656 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:24:16,656 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:24:16,657 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:24:16,657 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:24:16,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:24:16,701 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:24:16,705 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:24:16,707 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:24:16,707 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:24:16,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:24:16,886 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:24:16,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:24:16,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:24:16,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:24:16,897 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:24:16,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:24:16" (1/1) ... [2018-01-20 23:24:16,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12061d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:16, skipping insertion in model container [2018-01-20 23:24:16,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:24:16" (1/1) ... [2018-01-20 23:24:16,918 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:24:16,958 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:24:17,080 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:24:17,100 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:24:17,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17 WrapperNode [2018-01-20 23:24:17,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:24:17,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:24:17,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:24:17,109 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:24:17,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (1/1) ... [2018-01-20 23:24:17,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (1/1) ... [2018-01-20 23:24:17,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (1/1) ... [2018-01-20 23:24:17,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (1/1) ... [2018-01-20 23:24:17,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (1/1) ... [2018-01-20 23:24:17,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (1/1) ... [2018-01-20 23:24:17,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (1/1) ... [2018-01-20 23:24:17,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:24:17,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:24:17,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:24:17,145 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:24:17,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (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 23:24:17,193 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:24:17,193 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:24:17,193 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcspn [2018-01-20 23:24:17,193 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:24:17,193 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:24:17,193 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:24:17,193 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:24:17,193 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:24:17,194 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:24:17,194 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:24:17,194 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcspn [2018-01-20 23:24:17,194 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:24:17,194 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:24:17,194 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:24:17,399 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:24:17,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:24:17 BoogieIcfgContainer [2018-01-20 23:24:17,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:24:17,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:24:17,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:24:17,402 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:24:17,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:24:16" (1/3) ... [2018-01-20 23:24:17,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178d941f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:24:17, skipping insertion in model container [2018-01-20 23:24:17,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:24:17" (2/3) ... [2018-01-20 23:24:17,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178d941f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:24:17, skipping insertion in model container [2018-01-20 23:24:17,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:24:17" (3/3) ... [2018-01-20 23:24:17,406 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:24:17,412 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:24:17,418 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 23:24:17,464 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:17,464 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:17,465 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:17,465 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:17,465 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:17,465 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:17,465 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:17,465 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:24:17,466 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 23:24:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:24:17,493 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:17,494 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:24:17,494 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:24:17,499 INFO L82 PathProgramCache]: Analyzing trace with hash 109556, now seen corresponding path program 1 times [2018-01-20 23:24:17,502 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:17,557 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,558 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:17,558 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,558 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:17,611 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:24:17,617 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:17,622 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:17,622 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:17,622 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:17,622 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:17,622 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:17,623 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:17,623 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:17,623 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrcspnErr0EnsuresViolation======== [2018-01-20 23:24:17,623 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 23:24:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-20 23:24:17,625 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:17,625 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:17,625 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcspnErr0EnsuresViolation]=== [2018-01-20 23:24:17,626 INFO L82 PathProgramCache]: Analyzing trace with hash -237753640, now seen corresponding path program 1 times [2018-01-20 23:24:17,626 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:17,627 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,627 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:17,627 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,627 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:17,659 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:17,708 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 23:24:17,709 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:17,709 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:17,710 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:17,711 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:17,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:17,801 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:17,803 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-01-20 23:24:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:17,825 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2018-01-20 23:24:17,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:17,826 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-20 23:24:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:17,832 INFO L225 Difference]: With dead ends: 76 [2018-01-20 23:24:17,833 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:24:17,836 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 23:24:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:24:17,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:24:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:24:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:24:17,855 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-01-20 23:24:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:17,856 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:24:17,856 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:24:17,856 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:24:17,859 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:17,859 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:17,859 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:17,859 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:17,859 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:17,859 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:17,860 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:17,860 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:24:17,860 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 23:24:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-20 23:24:17,864 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:17,864 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] [2018-01-20 23:24:17,864 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:24:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1411464645, now seen corresponding path program 1 times [2018-01-20 23:24:17,864 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:17,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,866 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:17,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,866 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:17,883 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:17,909 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 23:24:17,910 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:17,910 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:17,910 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:17,910 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:17,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:17,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:17,911 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-01-20 23:24:17,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:17,916 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2018-01-20 23:24:17,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:17,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2018-01-20 23:24:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:17,940 INFO L225 Difference]: With dead ends: 76 [2018-01-20 23:24:17,940 INFO L226 Difference]: Without dead ends: 43 [2018-01-20 23:24:17,941 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 23:24:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-20 23:24:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-20 23:24:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-20 23:24:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2018-01-20 23:24:17,951 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 28 [2018-01-20 23:24:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:17,951 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2018-01-20 23:24:17,951 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2018-01-20 23:24:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-20 23:24:17,952 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:17,952 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] [2018-01-20 23:24:17,952 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:24:17,952 INFO L82 PathProgramCache]: Analyzing trace with hash -895340150, now seen corresponding path program 1 times [2018-01-20 23:24:17,952 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:17,953 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,953 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:17,953 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:17,954 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:24:18,014 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:24:18,023 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:18,027 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:18,028 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:18,029 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:24:18,040 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:24:18,040 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:24:18,040 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:24:18,040 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:24:18,040 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:24:18,041 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:24:18,041 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:24:18,041 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 23:24:18,041 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:24:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2018-01-20 23:24:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-20 23:24:18,043 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:18,043 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:24:18,043 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 23:24:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash -61101019, now seen corresponding path program 1 times [2018-01-20 23:24:18,044 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:18,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:18,045 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:18,045 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:18,045 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:18,056 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:18,076 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 23:24:18,076 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:18,076 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:24:18,076 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:18,077 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:24:18,077 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:24:18,077 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:24:18,078 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2018-01-20 23:24:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:18,083 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2018-01-20 23:24:18,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:24:18,083 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-20 23:24:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:18,085 INFO L225 Difference]: With dead ends: 76 [2018-01-20 23:24:18,085 INFO L226 Difference]: Without dead ends: 41 [2018-01-20 23:24:18,085 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 23:24:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-01-20 23:24:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-01-20 23:24:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-20 23:24:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-01-20 23:24:18,092 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2018-01-20 23:24:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:18,092 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2018-01-20 23:24:18,092 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:24:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2018-01-20 23:24:18,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-20 23:24:18,093 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:24:18,094 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] [2018-01-20 23:24:18,094 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 23:24:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash 799067434, now seen corresponding path program 1 times [2018-01-20 23:24:18,094 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:24:18,095 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:18,096 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:24:18,096 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:24:18,096 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:24:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:24:18,114 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:24:18,586 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 23:24:18,586 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:24:18,586 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-20 23:24:18,586 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:24:18,587 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 23:24:18,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 23:24:18,587 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:24:18,587 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 9 states. [2018-01-20 23:24:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:24:18,880 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2018-01-20 23:24:18,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 23:24:18,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-01-20 23:24:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:24:18,881 INFO L225 Difference]: With dead ends: 41 [2018-01-20 23:24:18,881 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:24:18,882 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-20 23:24:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:24:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:24:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:24:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:24:18,882 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2018-01-20 23:24:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:24:18,883 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:24:18,883 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 23:24:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:24:18,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:24:18,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:24:18 BoogieIcfgContainer [2018-01-20 23:24:18,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 23:24:18,886 INFO L168 Benchmark]: Toolchain (without parser) took 1999.63 ms. Allocated memory was 305.1 MB in the beginning and 468.7 MB in the end (delta: 163.6 MB). Free memory was 263.4 MB in the beginning and 353.6 MB in the end (delta: -90.2 MB). Peak memory consumption was 73.4 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:18,887 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 305.1 MB. Free memory is still 269.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:24:18,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.16 ms. Allocated memory is still 305.1 MB. Free memory was 262.4 MB in the beginning and 252.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:18,888 INFO L168 Benchmark]: Boogie Preprocessor took 35.66 ms. Allocated memory is still 305.1 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:18,888 INFO L168 Benchmark]: RCFGBuilder took 255.09 ms. Allocated memory is still 305.1 MB. Free memory was 250.3 MB in the beginning and 232.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:18,888 INFO L168 Benchmark]: TraceAbstraction took 1485.31 ms. Allocated memory was 305.1 MB in the beginning and 468.7 MB in the end (delta: 163.6 MB). Free memory was 232.8 MB in the beginning and 353.6 MB in the end (delta: -120.9 MB). Peak memory consumption was 42.7 MB. Max. memory is 5.3 GB. [2018-01-20 23:24:18,889 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 305.1 MB. Free memory is still 269.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 216.16 ms. Allocated memory is still 305.1 MB. Free memory was 262.4 MB in the beginning and 252.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 35.66 ms. Allocated memory is still 305.1 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 255.09 ms. Allocated memory is still 305.1 MB. Free memory was 250.3 MB in the beginning and 232.8 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1485.31 ms. Allocated memory was 305.1 MB in the beginning and 468.7 MB in the end (delta: 163.6 MB). Free memory was 232.8 MB in the beginning and 353.6 MB in the end (delta: -120.9 MB). Peak memory consumption was 42.7 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, 47 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=47occurred 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, 47 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 51 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=47occurred 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, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 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: [L556] int length1 = __VERIFIER_nondet_int(); [L557] int length2 = __VERIFIER_nondet_int(); [L558] COND TRUE length1 < 1 [L559] length1 = 1 VAL [length1=1, length2=0] [L561] COND TRUE length2 < 1 [L562] length2 = 1 VAL [length1=1, length2=1] [L564] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, length2=1] [L564] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, length2=1, nondetString1={3:0}] [L565] EXPR, FCALL __builtin_alloca (length2 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}] [L565] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L566] FCALL nondetString1[length1-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L567] FCALL nondetString2[length2-1] = '\0' VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L568] CALL, EXPR cstrcspn(nondetString1,nondetString2) VAL [s1={3:0}, s2={4:0}] [L542] const char *sc1; [L543] const char *s; [L544] int c; [L545] sc1 = s1 VAL [s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, sc1={3:0}] [L545] EXPR, FCALL \read(*sc1) VAL [\read(*sc1)=0, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, sc1={3:0}] [L545] COND FALSE !(*sc1 != '\0') [L553] RET return sc1 - s1; VAL [\result=0, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, sc1={3:0}] [L568] EXPR cstrcspn(nondetString1,nondetString2) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, cstrcspn(nondetString1,nondetString2)=0, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L568] return cstrcspn(nondetString1,nondetString2); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 47 locations, 4 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 51 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=47occurred 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, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 729 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: 555]: 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, 47 locations, 4 error locations. SAFE Result, 0.8s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 86 SDtfs, 30 SDslu, 30 SDs, 0 SdLazy, 193 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, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 0.4s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 6295 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/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_23-24-18-899.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_23-24-18-899.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_23-24-18-899.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_23-24-18-899.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_23-24-18-899.csv Received shutdown request...