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_imprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:30:23,231 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:30:23,232 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:30:23,246 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:30:23,246 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:30:23,247 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:30:23,248 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:30:23,250 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:30:23,252 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:30:23,253 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:30:23,254 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 00:30:23,276 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_imprecise.epf [2018-01-21 00:30:23,285 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:30:23,285 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:30:23,286 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:30:23,286 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:30:23,286 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:30:23,286 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:30:23,286 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:30:23,286 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:30:23,287 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:30:23,287 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:30:23,287 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:30:23,287 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:30:23,287 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:30:23,287 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:30:23,288 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:30:23,288 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:30:23,288 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:30:23,288 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:30:23,288 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:30:23,288 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:30:23,288 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:30:23,289 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:30:23,289 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:30:23,289 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:30:23,289 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:30:23,289 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:30:23,290 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:30:23,290 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:30:23,290 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:30:23,290 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:30:23,290 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:30:23,290 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:30:23,290 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:30:23,291 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:30:23,291 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:30:23,291 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:30:23,291 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:30:23,292 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:30:23,292 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:30:23,324 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:30:23,335 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:30:23,338 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:30:23,339 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:30:23,339 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:30:23,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-21 00:30:23,498 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:30:23,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:30:23,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:30:23,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:30:23,509 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:30:23,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533d743e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23, skipping insertion in model container [2018-01-21 00:30:23,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,527 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:30:23,565 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:30:23,684 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:30:23,700 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:30:23,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23 WrapperNode [2018-01-21 00:30:23,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:30:23,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:30:23,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:30:23,707 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:30:23,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... [2018-01-21 00:30:23,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:30:23,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:30:23,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:30:23,748 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:30:23,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:30:23,802 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:30:23,802 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:30:23,802 INFO L136 BoogieDeclarations]: Found implementation of procedure cstpcpy [2018-01-21 00:30:23,802 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:30:23,802 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:30:23,802 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:30:23,802 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:30:23,803 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:30:23,803 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:30:23,803 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:30:23,803 INFO L128 BoogieDeclarations]: Found specification of procedure cstpcpy [2018-01-21 00:30:23,803 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:30:23,803 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:30:23,803 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:30:23,989 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:30:23,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:30:23 BoogieIcfgContainer [2018-01-21 00:30:23,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:30:23,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:30:23,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:30:23,992 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:30:23,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:30:23" (1/3) ... [2018-01-21 00:30:23,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6699343d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:30:23, skipping insertion in model container [2018-01-21 00:30:23,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:30:23" (2/3) ... [2018-01-21 00:30:23,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6699343d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:30:23, skipping insertion in model container [2018-01-21 00:30:23,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:30:23" (3/3) ... [2018-01-21 00:30:23,995 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i [2018-01-21 00:30:24,001 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:30:24,007 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 00:30:24,057 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:30:24,057 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:30:24,058 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:30:24,058 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:30:24,058 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:30:24,058 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:30:24,058 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:30:24,058 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:30:24,059 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:30:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 00:30:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:30:24,086 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:30:24,087 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:30:24,088 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:30:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 84570, now seen corresponding path program 1 times [2018-01-21 00:30:24,096 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:30:24,155 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,155 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:30:24,156 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,156 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:30:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:30:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:30:24,210 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:30:24,215 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:30:24,221 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:30:24,221 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:30:24,221 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:30:24,221 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:30:24,221 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:30:24,221 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:30:24,221 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:30:24,221 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:30:24,222 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:30:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 00:30:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 00:30:24,223 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:30:24,224 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:30:24,224 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:30:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1509367990, now seen corresponding path program 1 times [2018-01-21 00:30:24,224 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:30:24,225 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,225 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:30:24,225 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,225 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:30:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:30:24,251 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:30:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:30:24,314 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:30:24,314 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:30:24,314 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:30:24,316 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:30:24,399 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:30:24,399 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:30:24,402 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-21 00:30:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:30:24,480 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-01-21 00:30:24,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:30:24,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-01-21 00:30:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:30:24,494 INFO L225 Difference]: With dead ends: 55 [2018-01-21 00:30:24,495 INFO L226 Difference]: Without dead ends: 36 [2018-01-21 00:30:24,497 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:30:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-01-21 00:30:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-01-21 00:30:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-01-21 00:30:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2018-01-21 00:30:24,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 12 [2018-01-21 00:30:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:30:24,533 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2018-01-21 00:30:24,533 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:30:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2018-01-21 00:30:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 00:30:24,534 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:30:24,534 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:30:24,534 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:30:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1507520948, now seen corresponding path program 1 times [2018-01-21 00:30:24,535 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:30:24,536 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,536 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:30:24,536 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,536 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:30:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:30:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:30:24,560 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:30:24,562 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:30:24,563 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:30:24,563 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:30:24,568 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:30:24,568 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:30:24,568 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:30:24,568 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:30:24,568 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:30:24,568 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:30:24,568 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:30:24,568 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:30:24,569 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:30:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 00:30:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-21 00:30:24,570 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:30:24,570 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:30:24,570 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:30:24,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1033971711, now seen corresponding path program 1 times [2018-01-21 00:30:24,570 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:30:24,571 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,571 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:30:24,572 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,572 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:30:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:30:24,580 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:30:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:30:24,607 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:30:24,607 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:30:24,608 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:30:24,608 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:30:24,608 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:30:24,608 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:30:24,609 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2018-01-21 00:30:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:30:24,652 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-01-21 00:30:24,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:30:24,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-01-21 00:30:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:30:24,654 INFO L225 Difference]: With dead ends: 55 [2018-01-21 00:30:24,654 INFO L226 Difference]: Without dead ends: 34 [2018-01-21 00:30:24,655 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:30:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-01-21 00:30:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-01-21 00:30:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-01-21 00:30:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-01-21 00:30:24,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 10 [2018-01-21 00:30:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:30:24,661 INFO L432 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-01-21 00:30:24,661 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:30:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-01-21 00:30:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-21 00:30:24,662 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:30:24,662 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:30:24,662 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 00:30:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1033969789, now seen corresponding path program 1 times [2018-01-21 00:30:24,663 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:30:24,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,664 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:30:24,664 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,664 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:30:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:30:24,674 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:30:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:30:24,708 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:30:24,708 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:30:24,708 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:30:24,709 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 00:30:24,709 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 00:30:24,709 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:30:24,709 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 3 states. [2018-01-21 00:30:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:30:24,771 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-01-21 00:30:24,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 00:30:24,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-01-21 00:30:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:30:24,772 INFO L225 Difference]: With dead ends: 34 [2018-01-21 00:30:24,772 INFO L226 Difference]: Without dead ends: 32 [2018-01-21 00:30:24,773 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 00:30:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-01-21 00:30:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-01-21 00:30:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-01-21 00:30:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-01-21 00:30:24,778 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 10 [2018-01-21 00:30:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:30:24,779 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-01-21 00:30:24,779 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 00:30:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-01-21 00:30:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 00:30:24,779 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:30:24,780 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:30:24,780 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 00:30:24,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1655323713, now seen corresponding path program 1 times [2018-01-21 00:30:24,780 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:30:24,781 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,781 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:30:24,781 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:24,781 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:30:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:30:24,807 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:30:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:30:24,978 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:30:24,978 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:30:24,979 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:30:24,979 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 00:30:24,979 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 00:30:24,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 00:30:24,980 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2018-01-21 00:30:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:30:25,099 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-01-21 00:30:25,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 00:30:25,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2018-01-21 00:30:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:30:25,100 INFO L225 Difference]: With dead ends: 31 [2018-01-21 00:30:25,100 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:30:25,100 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-21 00:30:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:30:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:30:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:30:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:30:25,101 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-01-21 00:30:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:30:25,101 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:30:25,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 00:30:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:30:25,101 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:30:25,104 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:30:25,104 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:30:25,104 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:30:25,104 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:30:25,104 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:30:25,105 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:30:25,105 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:30:25,105 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstpcpyErr0EnsuresViolation======== [2018-01-21 00:30:25,105 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:30:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-01-21 00:30:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 00:30:25,107 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:30:25,108 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:30:25,108 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstpcpyErr0EnsuresViolation]=== [2018-01-21 00:30:25,108 INFO L82 PathProgramCache]: Analyzing trace with hash -476345640, now seen corresponding path program 1 times [2018-01-21 00:30:25,108 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:30:25,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:25,109 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:30:25,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:30:25,109 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:30:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:30:25,122 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:30:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:30:25,137 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:30:25,137 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:30:25,137 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:30:25,138 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:30:25,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:30:25,138 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:30:25,139 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2018-01-21 00:30:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:30:25,142 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-01-21 00:30:25,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:30:25,143 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-21 00:30:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:30:25,143 INFO L225 Difference]: With dead ends: 51 [2018-01-21 00:30:25,143 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:30:25,144 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:30:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:30:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:30:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:30:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:30:25,145 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-01-21 00:30:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:30:25,145 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:30:25,145 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:30:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:30:25,146 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:30:25,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 12:30:25 BoogieIcfgContainer [2018-01-21 00:30:25,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 00:30:25,148 INFO L168 Benchmark]: Toolchain (without parser) took 1649.84 ms. Allocated memory was 304.1 MB in the beginning and 464.5 MB in the end (delta: 160.4 MB). Free memory was 264.0 MB in the beginning and 369.3 MB in the end (delta: -105.3 MB). Peak memory consumption was 55.1 MB. Max. memory is 5.3 GB. [2018-01-21 00:30:25,149 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 304.1 MB. Free memory is still 270.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 00:30:25,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.67 ms. Allocated memory is still 304.1 MB. Free memory was 263.0 MB in the beginning and 252.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-21 00:30:25,150 INFO L168 Benchmark]: Boogie Preprocessor took 40.04 ms. Allocated memory is still 304.1 MB. Free memory was 252.9 MB in the beginning and 251.9 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 5.3 GB. [2018-01-21 00:30:25,150 INFO L168 Benchmark]: RCFGBuilder took 241.91 ms. Allocated memory is still 304.1 MB. Free memory was 251.9 MB in the beginning and 235.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:30:25,150 INFO L168 Benchmark]: TraceAbstraction took 1157.64 ms. Allocated memory was 304.1 MB in the beginning and 464.5 MB in the end (delta: 160.4 MB). Free memory was 235.9 MB in the beginning and 369.3 MB in the end (delta: -133.4 MB). Peak memory consumption was 27.0 MB. Max. memory is 5.3 GB. [2018-01-21 00:30:25,152 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 304.1 MB. Free memory is still 270.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 203.67 ms. Allocated memory is still 304.1 MB. Free memory was 263.0 MB in the beginning and 252.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.04 ms. Allocated memory is still 304.1 MB. Free memory was 252.9 MB in the beginning and 251.9 MB in the end (delta: 996.4 kB). Peak memory consumption was 996.4 kB. Max. memory is 5.3 GB. * RCFGBuilder took 241.91 ms. Allocated memory is still 304.1 MB. Free memory was 251.9 MB in the beginning and 235.9 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1157.64 ms. Allocated memory was 304.1 MB in the beginning and 464.5 MB in the end (delta: 160.4 MB). Free memory was 235.9 MB in the beginning and 369.3 MB in the end (delta: -133.4 MB). Peak memory consumption was 27.0 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) * 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, 37 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=37occurred 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: [L546] int length1 = __VERIFIER_nondet_int(); [L547] int length2 = __VERIFIER_nondet_int(); [L548] COND TRUE length1 < 1 [L549] length1 = 1 VAL [length1=1, length2=2] [L551] COND FALSE !(length2 < 1) VAL [length1=1, length2=2] [L554] COND TRUE length1 < length2 [L554] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 37 locations, 4 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 30 SDslu, 42 SDs, 0 SdLazy, 11 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 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: 545]: 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, 37 locations, 4 error locations. SAFE Result, 0.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 93 SDtfs, 53 SDslu, 74 SDs, 0 SdLazy, 99 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 5216 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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: cstpcpyErr0EnsuresViolation CFG has 4 procedures, 37 locations, 4 error locations. SAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 39 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=37occurred 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 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_00-30-25-160.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_00-30-25-160.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_00-30-25-160.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_00-30-25-160.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstpcpy-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_00-30-25-160.csv Received shutdown request...