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/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-a74eeac-m [2018-02-02 18:26:34,570 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 18:26:34,571 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 18:26:34,584 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 18:26:34,584 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 18:26:34,585 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 18:26:34,585 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 18:26:34,587 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 18:26:34,588 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 18:26:34,589 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 18:26:34,590 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 18:26:34,590 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 18:26:34,591 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 18:26:34,591 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 18:26:34,592 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 18:26:34,594 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 18:26:34,595 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 18:26:34,597 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 18:26:34,598 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 18:26:34,599 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 18:26:34,601 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-02 18:26:34,601 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-02 18:26:34,601 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-02 18:26:34,602 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-02 18:26:34,602 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-02 18:26:34,603 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-02 18:26:34,603 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-02 18:26:34,604 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-02 18:26:34,604 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-02 18:26:34,604 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 18:26:34,604 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 18:26:34,605 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 18:26:34,614 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 18:26:34,614 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 18:26:34,615 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 18:26:34,615 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 18:26:34,615 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 18:26:34,615 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 18:26:34,615 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 18:26:34,615 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 18:26:34,616 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 18:26:34,616 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 18:26:34,617 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 18:26:34,617 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 18:26:34,617 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 18:26:34,617 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 18:26:34,617 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 18:26:34,617 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 18:26:34,617 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 18:26:34,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 18:26:34,652 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 18:26:34,654 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 18:26:34,655 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 18:26:34,656 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 18:26:34,656 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 18:26:34,779 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 18:26:34,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 18:26:34,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 18:26:34,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 18:26:34,786 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 18:26:34,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421f655e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34, skipping insertion in model container [2018-02-02 18:26:34,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,799 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:26:34,825 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:26:34,910 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:26:34,921 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:26:34,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34 WrapperNode [2018-02-02 18:26:34,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 18:26:34,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 18:26:34,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 18:26:34,927 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 18:26:34,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (1/1) ... [2018-02-02 18:26:34,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 18:26:34,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 18:26:34,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 18:26:34,948 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 18:26:34,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (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 18:26:34,982 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 18:26:34,982 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 18:26:34,982 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-02-02 18:26:34,982 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 18:26:34,982 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 18:26:34,982 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 18:26:34,982 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 18:26:34,982 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 18:26:34,982 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 18:26:34,982 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 18:26:34,983 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-02-02 18:26:34,983 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 18:26:34,983 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 18:26:34,983 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 18:26:35,088 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 18:26:35,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:26:35 BoogieIcfgContainer [2018-02-02 18:26:35,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 18:26:35,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 18:26:35,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 18:26:35,092 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 18:26:35,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 06:26:34" (1/3) ... [2018-02-02 18:26:35,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edabab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:26:35, skipping insertion in model container [2018-02-02 18:26:35,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:26:34" (2/3) ... [2018-02-02 18:26:35,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edabab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:26:35, skipping insertion in model container [2018-02-02 18:26:35,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:26:35" (3/3) ... [2018-02-02 18:26:35,095 INFO L107 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 18:26:35,102 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 18:26:35,108 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-02-02 18:26:35,142 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 18:26:35,142 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 18:26:35,142 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 18:26:35,142 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 18:26:35,142 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 18:26:35,142 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 18:26:35,143 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 18:26:35,143 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 18:26:35,143 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 18:26:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-02-02 18:26:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 18:26:35,162 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:35,162 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:26:35,163 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1793434931, now seen corresponding path program 1 times [2018-02-02 18:26:35,168 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:35,168 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:35,200 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,201 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:35,201 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:35,238 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:26:35,287 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:26:35,287 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 18:26:35,289 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:26:35,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:26:35,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:26:35,303 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2018-02-02 18:26:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:35,353 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-02-02 18:26:35,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 18:26:35,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-02-02 18:26:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:35,360 INFO L225 Difference]: With dead ends: 30 [2018-02-02 18:26:35,360 INFO L226 Difference]: Without dead ends: 27 [2018-02-02 18:26:35,361 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 18:26:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-02-02 18:26:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-02-02 18:26:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-02-02 18:26:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-02-02 18:26:35,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2018-02-02 18:26:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:35,432 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-02-02 18:26:35,432 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:26:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-02-02 18:26:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 18:26:35,433 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:35,433 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:26:35,433 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1793434932, now seen corresponding path program 1 times [2018-02-02 18:26:35,433 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:35,433 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:35,434 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,435 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:35,435 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:35,446 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:35,521 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 18:26:35,521 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:26:35,522 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 18:26:35,523 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 18:26:35,523 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 18:26:35,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:26:35,524 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2018-02-02 18:26:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:35,574 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2018-02-02 18:26:35,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 18:26:35,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-02-02 18:26:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:35,575 INFO L225 Difference]: With dead ends: 26 [2018-02-02 18:26:35,575 INFO L226 Difference]: Without dead ends: 26 [2018-02-02 18:26:35,576 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 18:26:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-02-02 18:26:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-02-02 18:26:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-02 18:26:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-02-02 18:26:35,579 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 10 [2018-02-02 18:26:35,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:35,579 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-02-02 18:26:35,580 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 18:26:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-02-02 18:26:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 18:26:35,580 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:35,580 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:26:35,580 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2006900249, now seen corresponding path program 1 times [2018-02-02 18:26:35,581 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:35,581 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:35,582 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,582 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:35,582 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:35,593 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:35,622 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 18:26:35,623 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:26:35,623 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 18:26:35,623 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 18:26:35,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 18:26:35,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:26:35,624 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2018-02-02 18:26:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:35,666 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-02-02 18:26:35,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:26:35,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-02-02 18:26:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:35,668 INFO L225 Difference]: With dead ends: 25 [2018-02-02 18:26:35,668 INFO L226 Difference]: Without dead ends: 25 [2018-02-02 18:26:35,668 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 18:26:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-02-02 18:26:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-02-02 18:26:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-02-02 18:26:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-02-02 18:26:35,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 14 [2018-02-02 18:26:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:35,671 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-02-02 18:26:35,671 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 18:26:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-02-02 18:26:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 18:26:35,672 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:35,672 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:26:35,672 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2006900248, now seen corresponding path program 1 times [2018-02-02 18:26:35,673 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:35,673 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:35,673 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,674 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:35,674 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:35,683 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:35,747 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 18:26:35,748 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:26:35,748 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-02 18:26:35,748 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 18:26:35,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 18:26:35,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-02-02 18:26:35,749 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2018-02-02 18:26:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:35,813 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-02-02 18:26:35,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 18:26:35,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-02-02 18:26:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:35,816 INFO L225 Difference]: With dead ends: 32 [2018-02-02 18:26:35,816 INFO L226 Difference]: Without dead ends: 32 [2018-02-02 18:26:35,817 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 18:26:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-02-02 18:26:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2018-02-02 18:26:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-02-02 18:26:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-02-02 18:26:35,819 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 14 [2018-02-02 18:26:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:35,820 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-02-02 18:26:35,820 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 18:26:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-02-02 18:26:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-02-02 18:26:35,820 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:35,821 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:26:35,821 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1301829867, now seen corresponding path program 1 times [2018-02-02 18:26:35,821 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:35,821 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:35,822 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,822 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:35,822 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:35,832 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:35,906 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 18:26:35,906 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:26:35,906 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-02-02 18:26:35,907 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-02 18:26:35,907 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-02 18:26:35,907 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-02 18:26:35,907 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-02-02 18:26:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:35,994 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-02-02 18:26:35,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 18:26:35,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2018-02-02 18:26:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:35,995 INFO L225 Difference]: With dead ends: 43 [2018-02-02 18:26:35,995 INFO L226 Difference]: Without dead ends: 43 [2018-02-02 18:26:35,996 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-02-02 18:26:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-02-02 18:26:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2018-02-02 18:26:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-02-02 18:26:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-02-02 18:26:35,999 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 18 [2018-02-02 18:26:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:35,999 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-02-02 18:26:35,999 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-02 18:26:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-02-02 18:26:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-02-02 18:26:36,000 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:36,000 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:26:36,000 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:36,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1559995305, now seen corresponding path program 1 times [2018-02-02 18:26:36,000 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:36,000 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:36,001 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:36,001 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:36,001 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:36,010 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:36,139 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 18:26:36,139 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:26:36,139 INFO L213 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 18:26:36,149 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:36,173 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:26:36,203 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 18:26:36,205 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 18:26:36,205 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 18:26:36,206 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:26:36,210 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 18:26:36,210 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2018-02-02 18:26:36,278 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 18:26:36,283 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 18:26:36,284 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-02 18:26:36,286 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-02 18:26:36,295 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 18:26:36,295 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:33 [2018-02-02 18:26:36,349 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 18:26:36,365 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:26:36,365 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2018-02-02 18:26:36,365 INFO L409 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-02-02 18:26:36,365 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-02-02 18:26:36,366 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2018-02-02 18:26:36,366 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2018-02-02 18:26:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:37,078 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-02-02 18:26:37,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 18:26:37,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-02-02 18:26:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:37,079 INFO L225 Difference]: With dead ends: 50 [2018-02-02 18:26:37,079 INFO L226 Difference]: Without dead ends: 50 [2018-02-02 18:26:37,079 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2018-02-02 18:26:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-02-02 18:26:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2018-02-02 18:26:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 18:26:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-02-02 18:26:37,081 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 18 [2018-02-02 18:26:37,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:37,082 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-02-02 18:26:37,082 INFO L433 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-02-02 18:26:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-02-02 18:26:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 18:26:37,082 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:37,083 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, 1, 1] [2018-02-02 18:26:37,083 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -968711636, now seen corresponding path program 1 times [2018-02-02 18:26:37,083 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:37,083 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:37,083 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:37,084 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:37,084 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:37,099 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:37,128 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 18:26:37,128 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:26:37,128 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 18:26:37,128 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:26:37,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:26:37,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:26:37,129 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 4 states. [2018-02-02 18:26:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:37,152 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-02-02 18:26:37,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:26:37,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-02-02 18:26:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:37,153 INFO L225 Difference]: With dead ends: 41 [2018-02-02 18:26:37,153 INFO L226 Difference]: Without dead ends: 23 [2018-02-02 18:26:37,153 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 18:26:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-02-02 18:26:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-02-02 18:26:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-02-02 18:26:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-02-02 18:26:37,155 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22 [2018-02-02 18:26:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:37,156 INFO L432 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-02-02 18:26:37,156 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:26:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-02-02 18:26:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 18:26:37,156 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:26:37,156 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:26:37,156 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 18:26:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1772753452, now seen corresponding path program 2 times [2018-02-02 18:26:37,157 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:26:37,157 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:26:37,158 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:37,158 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:26:37,158 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:26:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:26:37,167 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:26:37,374 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 18:26:37,375 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:26:37,375 INFO L213 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 18:26:37,381 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:26:37,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:26:37,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:26:37,397 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:26:37,399 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 6 treesize of output 5 [2018-02-02 18:26:37,400 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:26:37,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:26:37,402 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-02-02 18:26:37,421 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 16 treesize of output 13 [2018-02-02 18:26:37,423 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 13 treesize of output 12 [2018-02-02 18:26:37,423 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 18:26:37,424 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:26:37,427 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:26:37,427 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2018-02-02 18:26:37,502 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 20 treesize of output 16 [2018-02-02 18:26:37,508 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 16 treesize of output 13 [2018-02-02 18:26:37,508 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-02 18:26:37,510 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-02 18:26:37,517 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-02-02 18:26:37,518 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:49 [2018-02-02 18:26:37,554 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 18:26:37,586 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:26:37,586 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-02-02 18:26:37,586 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-02-02 18:26:37,587 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-02-02 18:26:37,587 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-02-02 18:26:37,587 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 18 states. [2018-02-02 18:26:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:26:38,021 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-02-02 18:26:38,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-02-02 18:26:38,021 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2018-02-02 18:26:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:26:38,021 INFO L225 Difference]: With dead ends: 24 [2018-02-02 18:26:38,021 INFO L226 Difference]: Without dead ends: 0 [2018-02-02 18:26:38,022 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2018-02-02 18:26:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-02 18:26:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-02 18:26:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-02 18:26:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-02 18:26:38,023 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-02-02 18:26:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:26:38,023 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-02 18:26:38,023 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-02-02 18:26:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-02 18:26:38,023 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-02 18:26:38,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 06:26:38 BoogieIcfgContainer [2018-02-02 18:26:38,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 18:26:38,027 INFO L168 Benchmark]: Toolchain (without parser) took 3247.50 ms. Allocated memory was 401.6 MB in the beginning and 655.9 MB in the end (delta: 254.3 MB). Free memory was 359.8 MB in the beginning and 566.0 MB in the end (delta: -206.2 MB). Peak memory consumption was 48.0 MB. Max. memory is 5.3 GB. [2018-02-02 18:26:38,029 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 401.6 MB. Free memory is still 365.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 18:26:38,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.60 ms. Allocated memory is still 401.6 MB. Free memory was 358.5 MB in the beginning and 349.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-02 18:26:38,029 INFO L168 Benchmark]: Boogie Preprocessor took 21.09 ms. Allocated memory is still 401.6 MB. Free memory was 349.2 MB in the beginning and 346.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 18:26:38,029 INFO L168 Benchmark]: RCFGBuilder took 140.38 ms. Allocated memory is still 401.6 MB. Free memory was 346.6 MB in the beginning and 332.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 5.3 GB. [2018-02-02 18:26:38,029 INFO L168 Benchmark]: TraceAbstraction took 2937.14 ms. Allocated memory was 401.6 MB in the beginning and 655.9 MB in the end (delta: 254.3 MB). Free memory was 331.0 MB in the beginning and 566.7 MB in the end (delta: -235.7 MB). Peak memory consumption was 18.6 MB. Max. memory is 5.3 GB. [2018-02-02 18:26:38,031 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 401.6 MB. Free memory is still 365.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 145.60 ms. Allocated memory is still 401.6 MB. Free memory was 358.5 MB in the beginning and 349.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 21.09 ms. Allocated memory is still 401.6 MB. Free memory was 349.2 MB in the beginning and 346.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 140.38 ms. Allocated memory is still 401.6 MB. Free memory was 346.6 MB in the beginning and 332.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2937.14 ms. Allocated memory was 401.6 MB in the beginning and 655.9 MB in the end (delta: 254.3 MB). Free memory was 331.0 MB in the beginning and 566.7 MB in the end (delta: -235.7 MB). Peak memory consumption was 18.6 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: 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: 548]: 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 - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 5 error locations. SAFE Result, 2.8s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 154 SDtfs, 201 SDslu, 515 SDs, 0 SdLazy, 484 SolverSat, 74 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 158 ConstructedInterpolants, 11 QuantifiedInterpolants, 20892 SizeOfPredicates, 14 NumberOfNonLiveVariables, 164 ConjunctsInSsa, 49 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/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_18-26-38-037.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cstrlen-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_18-26-38-037.csv Received shutdown request...