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_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrcat-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:14:40,230 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:14:40,232 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:14:40,247 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:14:40,248 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:14:40,249 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:14:40,250 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:14:40,251 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:14:40,253 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:14:40,254 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:14:40,255 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:14:40,255 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:14:40,256 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:14:40,257 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:14:40,258 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:14:40,261 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:14:40,263 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:14:40,265 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:14:40,266 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:14:40,268 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:14:40,270 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:14:40,275 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:14:40,275 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:14:40,276 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_preciseopt.epf [2018-01-21 08:14:40,284 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:14:40,285 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:14:40,285 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:14:40,286 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:14:40,286 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:14:40,286 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:14:40,286 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:14:40,286 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:14:40,286 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:14:40,287 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:14:40,287 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:14:40,287 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:14:40,287 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:14:40,287 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:14:40,287 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:14:40,287 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:14:40,287 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:14:40,288 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:14:40,288 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:14:40,288 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:14:40,288 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:14:40,288 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:14:40,288 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:14:40,288 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:14:40,289 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:14:40,289 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:14:40,289 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:14:40,289 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:14:40,289 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:14:40,289 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:14:40,290 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:14:40,291 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:14:40,291 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:14:40,324 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:14:40,334 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:14:40,338 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:14:40,340 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:14:40,340 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:14:40,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:14:40,494 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:14:40,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:14:40,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:14:40,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:14:40,505 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:14:40,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3072b9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40, skipping insertion in model container [2018-01-21 08:14:40,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,523 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:14:40,560 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:14:40,681 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:14:40,702 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:14:40,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40 WrapperNode [2018-01-21 08:14:40,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:14:40,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:14:40,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:14:40,709 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:14:40,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (1/1) ... [2018-01-21 08:14:40,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:14:40,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:14:40,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:14:40,743 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:14:40,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (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 08:14:40,792 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:14:40,793 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:14:40,793 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrcat [2018-01-21 08:14:40,793 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:14:40,793 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:14:40,793 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:14:40,793 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:14:40,793 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:14:40,793 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:14:40,793 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:14:40,794 INFO L128 BoogieDeclarations]: Found specification of procedure cstrcat [2018-01-21 08:14:40,794 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:14:40,794 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:14:40,794 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:14:40,977 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:14:40,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:14:40 BoogieIcfgContainer [2018-01-21 08:14:40,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:14:40,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:14:40,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:14:40,980 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:14:40,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:14:40" (1/3) ... [2018-01-21 08:14:40,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b3175a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:14:40, skipping insertion in model container [2018-01-21 08:14:40,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:14:40" (2/3) ... [2018-01-21 08:14:40,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b3175a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:14:40, skipping insertion in model container [2018-01-21 08:14:40,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:14:40" (3/3) ... [2018-01-21 08:14:40,983 INFO L105 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:14:40,990 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:14:40,997 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 08:14:41,042 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:14:41,042 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:14:41,042 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:14:41,042 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:14:41,042 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:14:41,042 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:14:41,043 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:14:41,043 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:14:41,044 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:14:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:14:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:14:41,069 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:14:41,070 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:14:41,070 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:14:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash 103790, now seen corresponding path program 1 times [2018-01-21 08:14:41,075 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:14:41,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,116 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:14:41,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,116 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:14:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:14:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:14:41,171 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:14:41,176 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:14:41,181 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:14:41,182 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:14:41,182 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:14:41,182 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:14:41,182 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:14:41,182 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:14:41,182 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:14:41,182 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == cstrcatErr0EnsuresViolation======== [2018-01-21 08:14:41,182 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:14:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:14:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 08:14:41,185 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:14:41,185 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] [2018-01-21 08:14:41,185 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrcatErr0EnsuresViolation]=== [2018-01-21 08:14:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash 471274989, now seen corresponding path program 1 times [2018-01-21 08:14:41,185 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:14:41,186 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,186 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:14:41,186 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,186 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:14:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:14:41,222 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:14:41,267 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 08:14:41,268 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:14:41,268 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:14:41,268 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:14:41,270 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:14:41,362 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:14:41,363 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:14:41,365 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2018-01-21 08:14:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:14:41,383 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2018-01-21 08:14:41,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:14:41,385 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2018-01-21 08:14:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:14:41,391 INFO L225 Difference]: With dead ends: 61 [2018-01-21 08:14:41,391 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:14:41,395 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 08:14:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:14:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:14:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:14:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:14:41,414 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-01-21 08:14:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:14:41,415 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:14:41,415 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:14:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:14:41,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:14:41,418 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:14:41,418 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:14:41,418 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:14:41,418 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:14:41,418 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:14:41,418 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:14:41,418 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:14:41,418 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:14:41,419 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:14:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:14:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 08:14:41,421 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:14:41,421 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:14:41,422 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:14:41,422 INFO L82 PathProgramCache]: Analyzing trace with hash -666467876, now seen corresponding path program 1 times [2018-01-21 08:14:41,422 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:14:41,423 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,423 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:14:41,423 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,424 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:14:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:14:41,438 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:14:41,522 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 08:14:41,523 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:14:41,523 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:14:41,523 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:14:41,523 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:14:41,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:14:41,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:14:41,524 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2018-01-21 08:14:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:14:41,680 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2018-01-21 08:14:41,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:14:41,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-21 08:14:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:14:41,688 INFO L225 Difference]: With dead ends: 95 [2018-01-21 08:14:41,688 INFO L226 Difference]: Without dead ends: 70 [2018-01-21 08:14:41,689 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:14:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-21 08:14:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2018-01-21 08:14:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 08:14:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2018-01-21 08:14:41,709 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 13 [2018-01-21 08:14:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:14:41,710 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2018-01-21 08:14:41,710 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:14:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2018-01-21 08:14:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 08:14:41,711 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:14:41,711 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:14:41,711 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:14:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash -664620834, now seen corresponding path program 1 times [2018-01-21 08:14:41,712 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:14:41,713 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,713 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:14:41,713 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,713 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:14:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:14:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:14:41,746 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:14:41,750 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:14:41,751 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:14:41,751 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:14:41,759 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:14:41,759 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:14:41,759 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:14:41,759 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:14:41,759 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:14:41,759 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:14:41,759 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:14:41,760 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:14:41,760 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:14:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:14:41,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 08:14:41,762 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:14:41,762 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:14:41,762 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:14:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1524714170, now seen corresponding path program 1 times [2018-01-21 08:14:41,762 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:14:41,763 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,764 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:14:41,764 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,764 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:14:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:14:41,773 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:14:41,814 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 08:14:41,815 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:14:41,815 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:14:41,815 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:14:41,815 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:14:41,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:14:41,815 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:14:41,815 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2018-01-21 08:14:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:14:41,948 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2018-01-21 08:14:41,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:14:41,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-01-21 08:14:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:14:41,950 INFO L225 Difference]: With dead ends: 95 [2018-01-21 08:14:41,951 INFO L226 Difference]: Without dead ends: 68 [2018-01-21 08:14:41,951 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:14:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-21 08:14:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2018-01-21 08:14:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 08:14:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2018-01-21 08:14:41,958 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 11 [2018-01-21 08:14:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:14:41,958 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2018-01-21 08:14:41,958 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:14:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2018-01-21 08:14:41,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-01-21 08:14:41,958 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:14:41,959 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:14:41,959 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:14:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1524712248, now seen corresponding path program 1 times [2018-01-21 08:14:41,959 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:14:41,960 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,960 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:14:41,960 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:41,960 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:14:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:14:41,966 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:14:41,991 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 08:14:41,991 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:14:41,991 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:14:41,991 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:14:41,992 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:14:41,992 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:14:41,992 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:14:41,992 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 3 states. [2018-01-21 08:14:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:14:42,018 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2018-01-21 08:14:42,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:14:42,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-01-21 08:14:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:14:42,019 INFO L225 Difference]: With dead ends: 41 [2018-01-21 08:14:42,020 INFO L226 Difference]: Without dead ends: 39 [2018-01-21 08:14:42,020 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 08:14:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-01-21 08:14:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2018-01-21 08:14:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-01-21 08:14:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-01-21 08:14:42,025 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 11 [2018-01-21 08:14:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:14:42,026 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-01-21 08:14:42,026 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:14:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-01-21 08:14:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-01-21 08:14:42,027 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:14:42,027 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, 1] [2018-01-21 08:14:42,027 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:14:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash 956644651, now seen corresponding path program 1 times [2018-01-21 08:14:42,028 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:14:42,029 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:42,029 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:14:42,029 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:14:42,029 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:14:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:14:42,061 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:14:42,302 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 08:14:42,303 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:14:42,303 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 08:14:42,303 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:14:42,304 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 08:14:42,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 08:14:42,304 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:14:42,304 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2018-01-21 08:14:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:14:42,468 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-01-21 08:14:42,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-21 08:14:42,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2018-01-21 08:14:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:14:42,470 INFO L225 Difference]: With dead ends: 36 [2018-01-21 08:14:42,470 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 08:14:42,470 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-01-21 08:14:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 08:14:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 08:14:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 08:14:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 08:14:42,471 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2018-01-21 08:14:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:14:42,471 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 08:14:42,472 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 08:14:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 08:14:42,472 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 08:14:42,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 08:14:42 BoogieIcfgContainer [2018-01-21 08:14:42,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 08:14:42,476 INFO L168 Benchmark]: Toolchain (without parser) took 1981.12 ms. Allocated memory was 304.1 MB in the beginning and 465.6 MB in the end (delta: 161.5 MB). Free memory was 261.4 MB in the beginning and 337.3 MB in the end (delta: -75.9 MB). Peak memory consumption was 85.6 MB. Max. memory is 5.3 GB. [2018-01-21 08:14:42,477 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 304.1 MB. Free memory is still 267.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 08:14:42,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.61 ms. Allocated memory is still 304.1 MB. Free memory was 261.4 MB in the beginning and 251.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:14:42,477 INFO L168 Benchmark]: Boogie Preprocessor took 33.11 ms. Allocated memory is still 304.1 MB. Free memory was 251.4 MB in the beginning and 249.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:14:42,478 INFO L168 Benchmark]: RCFGBuilder took 235.00 ms. Allocated memory is still 304.1 MB. Free memory was 249.4 MB in the beginning and 232.9 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 5.3 GB. [2018-01-21 08:14:42,478 INFO L168 Benchmark]: TraceAbstraction took 1496.45 ms. Allocated memory was 304.1 MB in the beginning and 465.6 MB in the end (delta: 161.5 MB). Free memory was 232.9 MB in the beginning and 337.3 MB in the end (delta: -104.4 MB). Peak memory consumption was 57.1 MB. Max. memory is 5.3 GB. [2018-01-21 08:14:42,480 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 304.1 MB. Free memory is still 267.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 209.61 ms. Allocated memory is still 304.1 MB. Free memory was 261.4 MB in the beginning and 251.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 33.11 ms. Allocated memory is still 304.1 MB. Free memory was 251.4 MB in the beginning and 249.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 235.00 ms. Allocated memory is still 304.1 MB. Free memory was 249.4 MB in the beginning and 232.9 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1496.45 ms. Allocated memory was 304.1 MB in the beginning and 465.6 MB in the end (delta: 161.5 MB). Free memory was 232.9 MB in the beginning and 337.3 MB in the end (delta: -104.4 MB). Peak memory consumption was 57.1 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, 42 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=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: cstrcatErr0EnsuresViolation CFG has 4 procedures, 42 locations, 4 error locations. SAFE Result, 0.2s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 46 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=42occurred 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 - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L550] int length1 = __VERIFIER_nondet_int(); [L551] int length2 = __VERIFIER_nondet_int(); [L552] int length3 = __VERIFIER_nondet_int(); [L553] COND TRUE length1 < 1 [L554] length1 = 1 VAL [length1=1, length2=0, length3=3] [L556] COND TRUE length2 < 2 [L557] length2 = 2 VAL [length1=1, length2=2, length3=3] [L559] COND FALSE !(length3 < 1) VAL [length1=1, length2=2, length3=3] [L562] COND TRUE length2 - length3 < length1 || length3 > length2 [L562] return 0; - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 4 procedures, 42 locations, 4 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 74 SDslu, 111 SDs, 0 SdLazy, 36 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 29 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 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: 549]: 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, 42 locations, 4 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 115 SDtfs, 108 SDslu, 153 SDs, 0 SdLazy, 137 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 7490 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 RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_08-14-42-489.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_08-14-42-489.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_08-14-42-489.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_08-14-42-489.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrcat-alloca_true-valid-memsafety_true-termination.i_mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_08-14-42-489.csv Received shutdown request...