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/openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-20 23:25:57,212 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-20 23:25:57,213 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-20 23:25:57,229 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-20 23:25:57,230 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-20 23:25:57,231 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-20 23:25:57,232 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-20 23:25:57,233 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-20 23:25:57,235 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-20 23:25:57,236 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-20 23:25:57,237 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-20 23:25:57,237 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-20 23:25:57,238 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-20 23:25:57,240 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-20 23:25:57,241 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-20 23:25:57,243 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-20 23:25:57,246 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-20 23:25:57,248 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-20 23:25:57,249 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-20 23:25:57,251 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-20 23:25:57,253 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-20 23:25:57,258 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-20 23:25:57,259 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-20 23:25:57,260 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 23:25:57,268 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-20 23:25:57,268 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-20 23:25:57,269 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-20 23:25:57,269 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-20 23:25:57,269 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-20 23:25:57,270 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-20 23:25:57,270 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-20 23:25:57,270 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-20 23:25:57,270 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-20 23:25:57,271 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-20 23:25:57,272 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-20 23:25:57,272 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-20 23:25:57,272 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-20 23:25:57,272 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-20 23:25:57,272 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-20 23:25:57,272 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-20 23:25:57,273 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-20 23:25:57,273 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-20 23:25:57,273 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-20 23:25:57,273 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-20 23:25:57,273 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-20 23:25:57,274 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-20 23:25:57,275 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-20 23:25:57,275 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-20 23:25:57,310 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-20 23:25:57,321 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-20 23:25:57,325 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-20 23:25:57,327 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-20 23:25:57,327 INFO L276 PluginConnector]: CDTParser initialized [2018-01-20 23:25:57,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:25:57,493 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-20 23:25:57,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-20 23:25:57,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-20 23:25:57,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-20 23:25:57,503 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-20 23:25:57,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb07ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57, skipping insertion in model container [2018-01-20 23:25:57,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,521 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:25:57,561 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-20 23:25:57,688 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:25:57,707 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-20 23:25:57,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57 WrapperNode [2018-01-20 23:25:57,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-20 23:25:57,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-20 23:25:57,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-20 23:25:57,717 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-20 23:25:57,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (1/1) ... [2018-01-20 23:25:57,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-20 23:25:57,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-20 23:25:57,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-20 23:25:57,758 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-20 23:25:57,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (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 23:25:57,816 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-20 23:25:57,816 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-20 23:25:57,816 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrspn [2018-01-20 23:25:57,816 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-20 23:25:57,816 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-20 23:25:57,816 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-20 23:25:57,816 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-20 23:25:57,817 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-20 23:25:57,817 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-20 23:25:57,817 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-20 23:25:57,817 INFO L128 BoogieDeclarations]: Found specification of procedure cstrspn [2018-01-20 23:25:57,817 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-20 23:25:57,817 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-20 23:25:57,818 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-20 23:25:57,982 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-20 23:25:57,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:25:57 BoogieIcfgContainer [2018-01-20 23:25:57,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-20 23:25:57,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-20 23:25:57,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-20 23:25:57,986 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-20 23:25:57,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.01 11:25:57" (1/3) ... [2018-01-20 23:25:57,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6987114e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:25:57, skipping insertion in model container [2018-01-20 23:25:57,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.01 11:25:57" (2/3) ... [2018-01-20 23:25:57,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6987114e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.01 11:25:57, skipping insertion in model container [2018-01-20 23:25:57,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.01 11:25:57" (3/3) ... [2018-01-20 23:25:57,989 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i [2018-01-20 23:25:57,994 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-20 23:25:57,999 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-20 23:25:58,041 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:58,041 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:58,041 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:58,041 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:58,041 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:58,041 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:58,042 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:58,042 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-20 23:25:58,042 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-20 23:25:58,061 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:58,062 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-20 23:25:58,062 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-20 23:25:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash 89375, now seen corresponding path program 1 times [2018-01-20 23:25:58,070 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:58,114 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,115 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:58,115 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,115 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:58,172 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:25:58,179 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:58,184 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:58,184 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:58,184 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:58,184 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:58,184 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:58,184 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:58,185 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:58,185 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-20 23:25:58,185 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-20 23:25:58,188 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:58,188 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] [2018-01-20 23:25:58,188 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:25:58,189 INFO L82 PathProgramCache]: Analyzing trace with hash -62116859, now seen corresponding path program 1 times [2018-01-20 23:25:58,189 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:58,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,190 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:58,190 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,190 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:58,228 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:58,285 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 23:25:58,287 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:58,288 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:25:58,288 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:58,290 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:25:58,379 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:25:58,380 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:25:58,382 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 23:25:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:58,406 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2018-01-20 23:25:58,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:25:58,408 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 31 [2018-01-20 23:25:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:58,418 INFO L225 Difference]: With dead ends: 54 [2018-01-20 23:25:58,418 INFO L226 Difference]: Without dead ends: 36 [2018-01-20 23:25:58,421 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 23:25:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-20 23:25:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-01-20 23:25:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-20 23:25:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-01-20 23:25:58,460 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2018-01-20 23:25:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:58,461 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-01-20 23:25:58,461 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:25:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-01-20 23:25:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-20 23:25:58,462 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:58,462 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 23:25:58,463 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-20 23:25:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1962652366, now seen corresponding path program 1 times [2018-01-20 23:25:58,463 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:58,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,464 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:58,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,464 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-20 23:25:58,559 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-20 23:25:58,572 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:58,577 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:58,579 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:58,579 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-20 23:25:58,591 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:58,591 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:58,591 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:58,591 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:58,591 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:58,591 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:58,592 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:58,592 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-20 23:25:58,592 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-20 23:25:58,594 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:58,594 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:25:58,594 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-20 23:25:58,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1287214047, now seen corresponding path program 1 times [2018-01-20 23:25:58,595 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:58,595 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,596 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:58,596 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,596 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:58,610 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:58,633 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 23:25:58,633 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:58,633 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:25:58,634 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:58,634 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:25:58,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:25:58,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:25:58,635 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 23:25:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:58,639 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2018-01-20 23:25:58,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:25:58,639 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2018-01-20 23:25:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:58,640 INFO L225 Difference]: With dead ends: 54 [2018-01-20 23:25:58,641 INFO L226 Difference]: Without dead ends: 34 [2018-01-20 23:25:58,641 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 23:25:58,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-20 23:25:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-01-20 23:25:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-20 23:25:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-01-20 23:25:58,646 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 29 [2018-01-20 23:25:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:58,646 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-01-20 23:25:58,646 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:25:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-01-20 23:25:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-20 23:25:58,648 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:58,648 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 23:25:58,648 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-20 23:25:58,648 INFO L82 PathProgramCache]: Analyzing trace with hash 234828942, now seen corresponding path program 1 times [2018-01-20 23:25:58,649 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:58,650 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,650 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:58,650 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:58,650 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:58,674 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:59,043 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 23:25:59,044 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:59,044 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-20 23:25:59,044 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:59,045 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-20 23:25:59,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-20 23:25:59,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-01-20 23:25:59,045 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 9 states. [2018-01-20 23:25:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:59,288 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-01-20 23:25:59,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-01-20 23:25:59,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-01-20 23:25:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:59,289 INFO L225 Difference]: With dead ends: 34 [2018-01-20 23:25:59,289 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:25:59,290 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-01-20 23:25:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:25:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:25:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:25:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:25:59,291 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2018-01-20 23:25:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:59,291 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:25:59,291 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-20 23:25:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:25:59,292 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:25:59,294 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-20 23:25:59,294 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-20 23:25:59,295 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-20 23:25:59,295 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-20 23:25:59,295 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-20 23:25:59,295 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-20 23:25:59,295 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-20 23:25:59,295 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrspnErr0EnsuresViolation======== [2018-01-20 23:25:59,295 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-20 23:25:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-01-20 23:25:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-20 23:25:59,298 INFO L314 BasicCegarLoop]: Found error trace [2018-01-20 23:25:59,298 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-20 23:25:59,299 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrspnErr0EnsuresViolation]=== [2018-01-20 23:25:59,299 INFO L82 PathProgramCache]: Analyzing trace with hash -649328313, now seen corresponding path program 1 times [2018-01-20 23:25:59,299 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-20 23:25:59,300 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:59,300 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-20 23:25:59,301 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-20 23:25:59,301 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-20 23:25:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-20 23:25:59,313 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-20 23:25:59,327 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 23:25:59,328 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-20 23:25:59,328 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-20 23:25:59,328 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-20 23:25:59,329 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-20 23:25:59,329 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-20 23:25:59,329 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-20 23:25:59,329 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-01-20 23:25:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-20 23:25:59,333 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2018-01-20 23:25:59,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-20 23:25:59,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-20 23:25:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-20 23:25:59,334 INFO L225 Difference]: With dead ends: 54 [2018-01-20 23:25:59,334 INFO L226 Difference]: Without dead ends: 0 [2018-01-20 23:25:59,335 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 23:25:59,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-20 23:25:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-20 23:25:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-20 23:25:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-20 23:25:59,336 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-20 23:25:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-20 23:25:59,336 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-20 23:25:59,336 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-20 23:25:59,336 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-20 23:25:59,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-20 23:25:59,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.01 11:25:59 BoogieIcfgContainer [2018-01-20 23:25:59,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-20 23:25:59,340 INFO L168 Benchmark]: Toolchain (without parser) took 1846.77 ms. Allocated memory was 304.6 MB in the beginning and 463.5 MB in the end (delta: 158.9 MB). Free memory was 261.9 MB in the beginning and 353.4 MB in the end (delta: -91.5 MB). Peak memory consumption was 67.4 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:59,341 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 304.6 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-20 23:25:59,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.67 ms. Allocated memory is still 304.6 MB. Free memory was 261.9 MB in the beginning and 252.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:59,342 INFO L168 Benchmark]: Boogie Preprocessor took 40.49 ms. Allocated memory is still 304.6 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:59,342 INFO L168 Benchmark]: RCFGBuilder took 224.80 ms. Allocated memory is still 304.6 MB. Free memory was 250.0 MB in the beginning and 233.4 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:59,342 INFO L168 Benchmark]: TraceAbstraction took 1356.00 ms. Allocated memory was 304.6 MB in the beginning and 463.5 MB in the end (delta: 158.9 MB). Free memory was 233.4 MB in the beginning and 353.4 MB in the end (delta: -120.0 MB). Peak memory consumption was 38.9 MB. Max. memory is 5.3 GB. [2018-01-20 23:25:59,343 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 304.6 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 219.67 ms. Allocated memory is still 304.6 MB. Free memory was 261.9 MB in the beginning and 252.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.49 ms. Allocated memory is still 304.6 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 224.80 ms. Allocated memory is still 304.6 MB. Free memory was 250.0 MB in the beginning and 233.4 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1356.00 ms. Allocated memory was 304.6 MB in the beginning and 463.5 MB in the end (delta: 158.9 MB). Free memory was 233.4 MB in the beginning and 353.4 MB in the end (delta: -120.0 MB). Peak memory consumption was 38.9 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 - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L553] int length1 = __VERIFIER_nondet_int(); [L554] int length2 = __VERIFIER_nondet_int(); [L555] COND TRUE length1 < 1 [L556] length1 = 1 VAL [length1=1, length2=0] [L558] COND TRUE length2 < 1 [L559] length2 = 1 VAL [length1=1, length2=1] [L561] EXPR, FCALL __builtin_alloca (length1 * sizeof(char)) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, length2=1] [L561] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, length1=1, length2=1, nondetString1={3:0}] [L562] 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}] [L562] 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}] [L563] 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}] [L564] 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}] [L565] CALL, EXPR cstrspn(nondetString1,nondetString2) VAL [s1={3:0}, s2={4:0}] [L543] const char *p = s1, *spanp; [L544] char c, sc; VAL [p={3:0}, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}] [L546] EXPR p++ VAL [p={3:1}, p++={3:0}, p++=0, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}] [L546] c = *p++ [L547] spanp = s2 VAL [c=0, p={4:0}, p={3:1}, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}] [L547] EXPR spanp++ VAL [c=0, p={4:1}, p={3:1}, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, spanp++=0spanp++={4:0}] [L547] EXPR sc = *spanp++ VAL [c=0, c=0, p={3:1}, p={4:1}, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}, spanp++={4:0}spanp++=0] [L547] COND FALSE !((sc = *spanp++) != 0) [L550] RET return (p - 1 - s1); VAL [\result=0, c=0, c=0, p={4:1}, p={3:1}, s1={3:0}, s1={3:0}, s2={4:0}, s2={4:0}] [L565] EXPR cstrspn(nondetString1,nondetString2) VAL [__builtin_alloca (length1 * sizeof(char))={3:0}, __builtin_alloca (length2 * sizeof(char))={4:0}, cstrspn(nondetString1,nondetString2)=0, length1=1, length2=1, nondetString1={3:0}, nondetString2={4:0}] [L565] return cstrspn(nondetString1,nondetString2); - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. UNSAFE Result, 0.4s OverallTime, 2 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, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 900 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: 552]: 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, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 68 SDtfs, 24 SDslu, 20 SDs, 0 SdLazy, 100 SolverSat, 9 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, 0.3s 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, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 59 ConstructedInterpolants, 0 QuantifiedInterpolants, 7418 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 - 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: cstrspnErr0EnsuresViolation CFG has 4 procedures, 40 locations, 4 error locations. SAFE Result, 0.0s OverallTime, 1 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, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 441 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-20_23-25-59-353.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-20_23-25-59-353.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-20_23-25-59-353.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-20_23-25-59-353.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrspn-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-20_23-25-59-353.csv Received shutdown request...