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/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 08:46:52,301 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 08:46:52,303 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 08:46:52,313 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 08:46:52,313 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 08:46:52,314 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 08:46:52,315 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 08:46:52,316 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 08:46:52,318 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 08:46:52,319 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 08:46:52,319 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 08:46:52,320 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 08:46:52,320 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 08:46:52,321 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 08:46:52,322 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 08:46:52,324 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 08:46:52,326 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 08:46:52,327 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 08:46:52,328 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 08:46:52,329 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 08:46:52,331 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 08:46:52,335 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 08:46:52,345 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 08:46:52,346 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 08:46:52,347 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 08:46:52,347 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 08:46:52,347 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 08:46:52,347 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 08:46:52,348 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 08:46:52,348 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 08:46:52,348 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 08:46:52,348 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 08:46:52,348 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 08:46:52,348 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 08:46:52,349 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 08:46:52,349 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 08:46:52,349 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 08:46:52,349 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 08:46:52,349 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 08:46:52,349 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 08:46:52,349 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 08:46:52,350 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 08:46:52,350 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 08:46:52,350 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 08:46:52,350 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 08:46:52,350 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 08:46:52,350 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 08:46:52,379 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 08:46:52,392 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 08:46:52,395 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 08:46:52,397 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 08:46:52,397 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 08:46:52,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:46:52,544 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 08:46:52,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 08:46:52,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 08:46:52,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 08:46:52,550 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 08:46:52,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440bb266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52, skipping insertion in model container [2018-02-02 08:46:52,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,562 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:46:52,589 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:46:52,675 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:46:52,689 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:46:52,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52 WrapperNode [2018-02-02 08:46:52,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 08:46:52,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 08:46:52,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 08:46:52,696 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 08:46:52,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... [2018-02-02 08:46:52,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 08:46:52,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 08:46:52,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 08:46:52,721 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 08:46:52,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-02 08:46:52,758 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 08:46:52,759 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 08:46:52,759 INFO L136 BoogieDeclarations]: Found implementation of procedure strlen_rec [2018-02-02 08:46:52,759 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 08:46:52,759 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 08:46:52,759 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 08:46:52,759 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 08:46:52,759 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 08:46:52,759 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 08:46:52,760 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 08:46:52,760 INFO L128 BoogieDeclarations]: Found specification of procedure strlen_rec [2018-02-02 08:46:52,760 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 08:46:52,760 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 08:46:52,760 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 08:46:52,873 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 08:46:52,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:46:52 BoogieIcfgContainer [2018-02-02 08:46:52,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 08:46:52,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 08:46:52,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 08:46:52,877 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 08:46:52,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 08:46:52" (1/3) ... [2018-02-02 08:46:52,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23dc7b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:46:52, skipping insertion in model container [2018-02-02 08:46:52,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:46:52" (2/3) ... [2018-02-02 08:46:52,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23dc7b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:46:52, skipping insertion in model container [2018-02-02 08:46:52,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:46:52" (3/3) ... [2018-02-02 08:46:52,879 INFO L107 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:46:52,885 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 08:46:52,890 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-02-02 08:46:52,917 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 08:46:52,917 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 08:46:52,917 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 08:46:52,917 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 08:46:52,918 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 08:46:52,918 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 08:46:52,918 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 08:46:52,918 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 08:46:52,918 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 08:46:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-02-02 08:46:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 08:46:52,933 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:46:52,934 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:46:52,934 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:46:52,938 INFO L82 PathProgramCache]: Analyzing trace with hash -407257815, now seen corresponding path program 1 times [2018-02-02 08:46:52,940 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:46:52,940 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:46:52,973 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:52,973 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:52,973 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:53,018 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:46:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:53,123 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:46:53,123 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:46:53,125 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 08:46:53,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 08:46:53,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:46:53,141 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2018-02-02 08:46:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:46:53,208 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-02-02 08:46:53,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 08:46:53,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-02-02 08:46:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:46:53,254 INFO L225 Difference]: With dead ends: 29 [2018-02-02 08:46:53,254 INFO L226 Difference]: Without dead ends: 26 [2018-02-02 08:46:53,255 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-02-02 08:46:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-02-02 08:46:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-02-02 08:46:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-02 08:46:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-02-02 08:46:53,280 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2018-02-02 08:46:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:46:53,280 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-02-02 08:46:53,280 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 08:46:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-02-02 08:46:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 08:46:53,281 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:46:53,281 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:46:53,281 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:46:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash -407257816, now seen corresponding path program 1 times [2018-02-02 08:46:53,281 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:46:53,281 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:46:53,282 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,282 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:53,282 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:53,290 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:46:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:53,316 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:46:53,316 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:46:53,317 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:46:53,317 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:46:53,317 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:46:53,317 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2018-02-02 08:46:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:46:53,378 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-02-02 08:46:53,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 08:46:53,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-02-02 08:46:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:46:53,379 INFO L225 Difference]: With dead ends: 25 [2018-02-02 08:46:53,379 INFO L226 Difference]: Without dead ends: 25 [2018-02-02 08:46:53,380 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:46:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-02-02 08:46:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-02-02 08:46:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-02-02 08:46:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-02-02 08:46:53,383 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 10 [2018-02-02 08:46:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:46:53,384 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-02-02 08:46:53,384 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:46:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-02-02 08:46:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 08:46:53,384 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:46:53,384 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:46:53,385 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:46:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash 665022209, now seen corresponding path program 1 times [2018-02-02 08:46:53,385 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:46:53,385 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:46:53,386 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,386 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:53,386 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:53,397 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:46:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:53,434 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:46:53,434 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:46:53,435 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 08:46:53,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 08:46:53,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:46:53,435 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2018-02-02 08:46:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:46:53,495 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-02-02 08:46:53,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 08:46:53,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-02-02 08:46:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:46:53,496 INFO L225 Difference]: With dead ends: 24 [2018-02-02 08:46:53,496 INFO L226 Difference]: Without dead ends: 24 [2018-02-02 08:46:53,497 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-02-02 08:46:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-02-02 08:46:53,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-02-02 08:46:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-02-02 08:46:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-02-02 08:46:53,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2018-02-02 08:46:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:46:53,501 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-02-02 08:46:53,502 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 08:46:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-02-02 08:46:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 08:46:53,503 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:46:53,503 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:46:53,503 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:46:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash 665022210, now seen corresponding path program 1 times [2018-02-02 08:46:53,504 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:46:53,504 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:46:53,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,504 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:53,505 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:53,524 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:46:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:53,625 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:46:53,625 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-02 08:46:53,625 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 08:46:53,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 08:46:53,625 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-02-02 08:46:53,626 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2018-02-02 08:46:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:46:53,691 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-02-02 08:46:53,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 08:46:53,691 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-02-02 08:46:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:46:53,692 INFO L225 Difference]: With dead ends: 31 [2018-02-02 08:46:53,692 INFO L226 Difference]: Without dead ends: 31 [2018-02-02 08:46:53,692 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-02-02 08:46:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-02-02 08:46:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-02-02 08:46:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-02-02 08:46:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-02-02 08:46:53,694 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2018-02-02 08:46:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:46:53,695 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-02-02 08:46:53,695 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 08:46:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-02-02 08:46:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 08:46:53,695 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:46:53,695 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:46:53,695 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:46:53,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1167971539, now seen corresponding path program 1 times [2018-02-02 08:46:53,695 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:46:53,696 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:46:53,696 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,696 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:53,696 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:53,706 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:46:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:53,797 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:46:53,797 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-02-02 08:46:53,797 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-02 08:46:53,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-02 08:46:53,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-02 08:46:53,798 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 9 states. [2018-02-02 08:46:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:46:53,899 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-02-02 08:46:53,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 08:46:53,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-02-02 08:46:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:46:53,900 INFO L225 Difference]: With dead ends: 45 [2018-02-02 08:46:53,900 INFO L226 Difference]: Without dead ends: 45 [2018-02-02 08:46:53,901 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-02-02 08:46:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-02-02 08:46:53,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2018-02-02 08:46:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-02-02 08:46:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-02-02 08:46:53,906 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 17 [2018-02-02 08:46:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:46:53,906 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-02-02 08:46:53,906 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-02 08:46:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-02-02 08:46:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 08:46:53,907 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:46:53,907 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:46:53,907 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:46:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash -466906961, now seen corresponding path program 1 times [2018-02-02 08:46:53,907 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:46:53,908 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:46:53,908 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,908 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:53,909 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:53,919 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:46:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:54,066 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:46:54,066 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:46:54,071 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:54,087 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:46:54,113 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-02-02 08:46:54,115 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2018-02-02 08:46:54,115 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 08:46:54,116 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:46:54,122 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-02-02 08:46:54,122 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2018-02-02 08:46:54,178 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2018-02-02 08:46:54,184 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2018-02-02 08:46:54,185 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-02 08:46:54,188 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:46:54,197 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:46:54,197 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:33 [2018-02-02 08:46:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:54,258 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:46:54,259 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2018-02-02 08:46:54,259 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-02-02 08:46:54,259 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-02-02 08:46:54,259 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-02-02 08:46:54,259 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 17 states. [2018-02-02 08:46:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:46:54,591 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-02-02 08:46:54,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-02-02 08:46:54,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-02-02 08:46:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:46:54,593 INFO L225 Difference]: With dead ends: 49 [2018-02-02 08:46:54,593 INFO L226 Difference]: Without dead ends: 49 [2018-02-02 08:46:54,593 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2018-02-02 08:46:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-02 08:46:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-02-02 08:46:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-02-02 08:46:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-02-02 08:46:54,596 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 17 [2018-02-02 08:46:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:46:54,597 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-02-02 08:46:54,597 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-02-02 08:46:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-02-02 08:46:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-02-02 08:46:54,597 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:46:54,597 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:46:54,597 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:46:54,597 INFO L82 PathProgramCache]: Analyzing trace with hash -847794598, now seen corresponding path program 2 times [2018-02-02 08:46:54,597 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:46:54,597 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:46:54,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:54,598 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:46:54,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:46:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:46:54,609 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:46:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:54,805 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:46:54,806 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:46:54,811 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 08:46:54,819 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:46:54,822 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:46:54,823 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 08:46:54,825 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:46:54,836 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-02-02 08:46:54,837 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2018-02-02 08:46:54,838 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 08:46:54,839 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:46:54,842 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-02-02 08:46:54,842 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2018-02-02 08:46:55,019 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2018-02-02 08:46:55,022 INFO L700 Elim1Store]: detected not equals via solver [2018-02-02 08:46:55,028 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2018-02-02 08:46:55,028 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-02 08:46:55,035 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:46:55,046 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:46:55,047 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:46, output treesize:43 [2018-02-02 08:46:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:46:55,096 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:46:55,096 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2018-02-02 08:46:55,096 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-02-02 08:46:55,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-02-02 08:46:55,097 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2018-02-02 08:46:55,097 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 22 states. [2018-02-02 08:46:55,400 WARN L146 SmtUtils]: Spent 242ms on a formula simplification. DAG size of input: 33 DAG size of output 33 [2018-02-02 08:46:56,281 WARN L146 SmtUtils]: Spent 340ms on a formula simplification. DAG size of input: 28 DAG size of output 28 [2018-02-02 08:47:01,341 WARN L146 SmtUtils]: Spent 4087ms on a formula simplification. DAG size of input: 58 DAG size of output 46 [2018-02-02 08:47:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:47:03,739 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2018-02-02 08:47:03,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-02 08:47:03,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-02-02 08:47:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:47:03,740 INFO L225 Difference]: With dead ends: 55 [2018-02-02 08:47:03,740 INFO L226 Difference]: Without dead ends: 55 [2018-02-02 08:47:03,741 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2018-02-02 08:47:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-02-02 08:47:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2018-02-02 08:47:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-02 08:47:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-02-02 08:47:03,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2018-02-02 08:47:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:47:03,746 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-02-02 08:47:03,746 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-02-02 08:47:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-02-02 08:47:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 08:47:03,747 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:47:03,747 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:47:03,747 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 08:47:03,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1711563014, now seen corresponding path program 1 times [2018-02-02 08:47:03,747 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:47:03,747 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:47:03,748 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:47:03,748 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 08:47:03,748 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:47:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:47:03,756 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:47:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:47:03,785 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:47:03,785 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:47:03,786 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:47:03,786 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:47:03,786 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:47:03,786 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 4 states. [2018-02-02 08:47:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:47:03,813 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-02-02 08:47:03,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 08:47:03,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-02-02 08:47:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:47:03,814 INFO L225 Difference]: With dead ends: 45 [2018-02-02 08:47:03,814 INFO L226 Difference]: Without dead ends: 0 [2018-02-02 08:47:03,814 INFO L554 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 [2018-02-02 08:47:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-02 08:47:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-02 08:47:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-02 08:47:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-02 08:47:03,815 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-02-02 08:47:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:47:03,815 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-02 08:47:03,815 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:47:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-02 08:47:03,815 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-02 08:47:03,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 08:47:03 BoogieIcfgContainer [2018-02-02 08:47:03,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 08:47:03,820 INFO L168 Benchmark]: Toolchain (without parser) took 11275.88 ms. Allocated memory was 397.9 MB in the beginning and 656.4 MB in the end (delta: 258.5 MB). Free memory was 354.6 MB in the beginning and 425.9 MB in the end (delta: -71.2 MB). Peak memory consumption was 187.2 MB. Max. memory is 5.3 GB. [2018-02-02 08:47:03,821 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 397.9 MB. Free memory is still 359.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 08:47:03,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.05 ms. Allocated memory is still 397.9 MB. Free memory was 354.6 MB in the beginning and 344.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:47:03,821 INFO L168 Benchmark]: Boogie Preprocessor took 24.82 ms. Allocated memory is still 397.9 MB. Free memory was 344.1 MB in the beginning and 341.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:47:03,822 INFO L168 Benchmark]: RCFGBuilder took 152.39 ms. Allocated memory is still 397.9 MB. Free memory was 341.4 MB in the beginning and 326.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 5.3 GB. [2018-02-02 08:47:03,822 INFO L168 Benchmark]: TraceAbstraction took 10945.81 ms. Allocated memory was 397.9 MB in the beginning and 656.4 MB in the end (delta: 258.5 MB). Free memory was 326.9 MB in the beginning and 425.9 MB in the end (delta: -99.0 MB). Peak memory consumption was 159.5 MB. Max. memory is 5.3 GB. [2018-02-02 08:47:03,823 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 397.9 MB. Free memory is still 359.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 150.05 ms. Allocated memory is still 397.9 MB. Free memory was 354.6 MB in the beginning and 344.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 24.82 ms. Allocated memory is still 397.9 MB. Free memory was 344.1 MB in the beginning and 341.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 152.39 ms. Allocated memory is still 397.9 MB. Free memory was 341.4 MB in the beginning and 326.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 10945.81 ms. Allocated memory was 397.9 MB in the beginning and 656.4 MB in the end (delta: 258.5 MB). Free memory was 326.9 MB in the beginning and 425.9 MB in the end (delta: -99.0 MB). Peak memory consumption was 159.5 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 5 error locations. SAFE Result, 10.9s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 9.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 176 SDtfs, 252 SDslu, 688 SDs, 0 SdLazy, 737 SolverSat, 141 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 149 ConstructedInterpolants, 10 QuantifiedInterpolants, 18980 SizeOfPredicates, 14 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 4/22 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec_strlen-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_08-47-03-828.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec_strlen-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_08-47-03-828.csv Received shutdown request...