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/rec_strlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 12:11:09,304 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 12:11:09,305 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 12:11:09,317 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 12:11:09,318 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 12:11:09,318 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 12:11:09,319 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 12:11:09,321 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 12:11:09,322 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 12:11:09,323 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 12:11:09,323 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 12:11:09,324 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 12:11:09,324 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 12:11:09,325 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 12:11:09,326 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 12:11:09,328 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 12:11:09,329 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 12:11:09,331 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 12:11:09,332 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 12:11:09,333 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 12:11:09,334 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 12:11:09,339 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 [2018-02-04 12:11:09,348 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 12:11:09,349 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 12:11:09,349 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 12:11:09,350 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 12:11:09,350 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 12:11:09,350 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 12:11:09,350 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 12:11:09,350 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 12:11:09,351 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 12:11:09,351 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 12:11:09,351 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 12:11:09,351 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 12:11:09,351 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 12:11:09,351 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 12:11:09,351 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 12:11:09,352 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 12:11:09,352 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 12:11:09,352 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 12:11:09,352 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 12:11:09,352 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 12:11:09,352 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 12:11:09,353 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 12:11:09,353 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 12:11:09,353 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-04 12:11:09,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 12:11:09,393 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 12:11:09,395 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 12:11:09,397 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 12:11:09,397 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 12:11:09,397 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-02-04 12:11:09,528 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 12:11:09,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 12:11:09,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 12:11:09,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 12:11:09,534 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 12:11:09,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32677a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09, skipping insertion in model container [2018-02-04 12:11:09,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,546 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 12:11:09,570 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 12:11:09,652 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 12:11:09,663 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 12:11:09,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09 WrapperNode [2018-02-04 12:11:09,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 12:11:09,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 12:11:09,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 12:11:09,668 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 12:11:09,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (1/1) ... [2018-02-04 12:11:09,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 12:11:09,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 12:11:09,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 12:11:09,693 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 12:11:09,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (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 [2018-02-04 12:11:09,730 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 12:11:09,730 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 12:11:09,730 INFO L136 BoogieDeclarations]: Found implementation of procedure strlen_rec [2018-02-04 12:11:09,730 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 12:11:09,730 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 12:11:09,730 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 12:11:09,730 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 12:11:09,730 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 12:11:09,730 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 12:11:09,730 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 12:11:09,731 INFO L128 BoogieDeclarations]: Found specification of procedure strlen_rec [2018-02-04 12:11:09,731 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 12:11:09,731 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 12:11:09,731 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 12:11:09,823 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 12:11:09,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 12:11:09 BoogieIcfgContainer [2018-02-04 12:11:09,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 12:11:09,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 12:11:09,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 12:11:09,827 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 12:11:09,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 12:11:09" (1/3) ... [2018-02-04 12:11:09,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0e49b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 12:11:09, skipping insertion in model container [2018-02-04 12:11:09,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:11:09" (2/3) ... [2018-02-04 12:11:09,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0e49b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 12:11:09, skipping insertion in model container [2018-02-04 12:11:09,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 12:11:09" (3/3) ... [2018-02-04 12:11:09,829 INFO L107 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-02-04 12:11:09,833 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 12:11:09,839 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-02-04 12:11:09,869 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 12:11:09,870 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 12:11:09,870 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 12:11:09,870 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 12:11:09,870 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 12:11:09,870 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 12:11:09,870 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 12:11:09,870 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 12:11:09,871 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 12:11:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-02-04 12:11:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-04 12:11:09,891 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:09,892 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:11:09,892 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash -407257815, now seen corresponding path program 1 times [2018-02-04 12:11:09,897 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:09,898 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:09,938 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:09,938 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:09,938 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:09,986 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:10,114 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:11:10,114 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 12:11:10,115 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 12:11:10,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 12:11:10,123 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-04 12:11:10,124 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2018-02-04 12:11:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:10,216 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-02-04 12:11:10,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-04 12:11:10,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-02-04 12:11:10,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:10,222 INFO L225 Difference]: With dead ends: 29 [2018-02-04 12:11:10,223 INFO L226 Difference]: Without dead ends: 26 [2018-02-04 12:11:10,224 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 [2018-02-04 12:11:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-02-04 12:11:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-02-04 12:11:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-04 12:11:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-02-04 12:11:10,249 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2018-02-04 12:11:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:10,249 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-02-04 12:11:10,249 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 12:11:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-02-04 12:11:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-04 12:11:10,249 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:10,249 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:11:10,250 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash -407257816, now seen corresponding path program 1 times [2018-02-04 12:11:10,250 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:10,250 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:10,251 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,251 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:10,251 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:10,259 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:10,286 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:11:10,286 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 12:11:10,287 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 12:11:10,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 12:11:10,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 12:11:10,288 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2018-02-04 12:11:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:10,317 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-02-04 12:11:10,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 12:11:10,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-02-04 12:11:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:10,318 INFO L225 Difference]: With dead ends: 25 [2018-02-04 12:11:10,318 INFO L226 Difference]: Without dead ends: 25 [2018-02-04 12:11:10,319 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 [2018-02-04 12:11:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-02-04 12:11:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-02-04 12:11:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-02-04 12:11:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-02-04 12:11:10,322 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 10 [2018-02-04 12:11:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:10,323 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-02-04 12:11:10,323 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 12:11:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-02-04 12:11:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 12:11:10,323 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:10,323 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:11:10,324 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:10,324 INFO L82 PathProgramCache]: Analyzing trace with hash 665022209, now seen corresponding path program 1 times [2018-02-04 12:11:10,324 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:10,324 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:10,325 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,325 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:10,325 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:10,335 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:10,369 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:11:10,370 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 12:11:10,370 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 12:11:10,370 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 12:11:10,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-04 12:11:10,370 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2018-02-04 12:11:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:10,414 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-02-04 12:11:10,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 12:11:10,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-02-04 12:11:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:10,415 INFO L225 Difference]: With dead ends: 24 [2018-02-04 12:11:10,415 INFO L226 Difference]: Without dead ends: 24 [2018-02-04 12:11:10,415 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 [2018-02-04 12:11:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-02-04 12:11:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-02-04 12:11:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-02-04 12:11:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-02-04 12:11:10,418 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2018-02-04 12:11:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:10,418 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-02-04 12:11:10,419 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 12:11:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-02-04 12:11:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 12:11:10,419 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:10,419 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:11:10,419 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:10,419 INFO L82 PathProgramCache]: Analyzing trace with hash 665022210, now seen corresponding path program 1 times [2018-02-04 12:11:10,419 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:10,419 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:10,420 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,420 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:10,420 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:10,428 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:10,492 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:11:10,492 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-04 12:11:10,492 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-04 12:11:10,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-04 12:11:10,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-02-04 12:11:10,492 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2018-02-04 12:11:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:10,566 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-02-04 12:11:10,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 12:11:10,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-02-04 12:11:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:10,567 INFO L225 Difference]: With dead ends: 31 [2018-02-04 12:11:10,567 INFO L226 Difference]: Without dead ends: 31 [2018-02-04 12:11:10,567 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 [2018-02-04 12:11:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-02-04 12:11:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-02-04 12:11:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-02-04 12:11:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2018-02-04 12:11:10,570 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2018-02-04 12:11:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:10,571 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2018-02-04 12:11:10,571 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-04 12:11:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2018-02-04 12:11:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-04 12:11:10,571 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:10,571 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:11:10,571 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:10,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1167971539, now seen corresponding path program 1 times [2018-02-04 12:11:10,572 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:10,572 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:10,572 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,573 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:10,573 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:10,585 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:10,669 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:11:10,669 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-02-04 12:11:10,669 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-04 12:11:10,669 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-04 12:11:10,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-04 12:11:10,671 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 9 states. [2018-02-04 12:11:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:10,760 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-02-04 12:11:10,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-04 12:11:10,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-02-04 12:11:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:10,761 INFO L225 Difference]: With dead ends: 45 [2018-02-04 12:11:10,761 INFO L226 Difference]: Without dead ends: 45 [2018-02-04 12:11:10,761 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 [2018-02-04 12:11:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-02-04 12:11:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2018-02-04 12:11:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-02-04 12:11:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-02-04 12:11:10,767 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 17 [2018-02-04 12:11:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:10,767 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-02-04 12:11:10,767 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-04 12:11:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-02-04 12:11:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-04 12:11:10,767 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:10,767 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:11:10,767 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash -466906961, now seen corresponding path program 1 times [2018-02-04 12:11:10,768 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:10,768 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:10,768 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,768 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:10,768 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:10,779 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:10,945 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 12:11:10,945 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 [2018-02-04 12:11:10,952 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:10,973 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 12:11:11,001 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 [2018-02-04 12:11:11,002 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 [2018-02-04 12:11:11,003 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-04 12:11:11,004 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-04 12:11:11,008 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. [2018-02-04 12:11:11,008 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2018-02-04 12:11:11,090 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 [2018-02-04 12:11:11,098 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 [2018-02-04 12:11:11,099 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-04 12:11:11,105 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-04 12:11:11,116 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-02-04 12:11:11,116 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:33 [2018-02-04 12:11:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:11,213 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 12:11:11,213 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2018-02-04 12:11:11,213 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-02-04 12:11:11,214 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-02-04 12:11:11,214 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-02-04 12:11:11,214 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 17 states. [2018-02-04 12:11:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:11,592 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-02-04 12:11:11,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-02-04 12:11:11,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-02-04 12:11:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:11,594 INFO L225 Difference]: With dead ends: 49 [2018-02-04 12:11:11,594 INFO L226 Difference]: Without dead ends: 49 [2018-02-04 12:11:11,595 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2018-02-04 12:11:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-04 12:11:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-02-04 12:11:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-02-04 12:11:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-02-04 12:11:11,598 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 17 [2018-02-04 12:11:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:11,599 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-02-04 12:11:11,599 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-02-04 12:11:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-02-04 12:11:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-02-04 12:11:11,599 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:11,599 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:11:11,599 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -847794598, now seen corresponding path program 2 times [2018-02-04 12:11:11,600 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:11,600 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:11,600 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:11,600 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:11:11,600 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:11,611 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:11,786 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 12:11:11,786 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 [2018-02-04 12:11:11,792 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 12:11:11,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 12:11:11,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 12:11:11,806 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 12:11:11,816 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 [2018-02-04 12:11:11,818 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 [2018-02-04 12:11:11,818 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-04 12:11:11,819 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-04 12:11:11,822 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. [2018-02-04 12:11:11,822 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2018-02-04 12:11:11,982 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 [2018-02-04 12:11:11,984 INFO L700 Elim1Store]: detected not equals via solver [2018-02-04 12:11:11,989 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 [2018-02-04 12:11:11,989 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-04 12:11:11,997 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-04 12:11:12,007 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-02-04 12:11:12,008 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:46, output treesize:43 [2018-02-04 12:11:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:12,057 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 12:11:12,057 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2018-02-04 12:11:12,057 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-02-04 12:11:12,057 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-02-04 12:11:12,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2018-02-04 12:11:12,058 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 22 states. [2018-02-04 12:11:12,405 WARN L146 SmtUtils]: Spent 257ms on a formula simplification. DAG size of input: 33 DAG size of output 33 [2018-02-04 12:11:13,384 WARN L146 SmtUtils]: Spent 399ms on a formula simplification. DAG size of input: 28 DAG size of output 28 [2018-02-04 12:11:16,410 WARN L146 SmtUtils]: Spent 2029ms on a formula simplification. DAG size of input: 58 DAG size of output 46 [2018-02-04 12:11:21,744 WARN L146 SmtUtils]: Spent 3266ms on a formula simplification. DAG size of input: 56 DAG size of output 46 [2018-02-04 12:11:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:21,824 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-02-04 12:11:21,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-04 12:11:21,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-02-04 12:11:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:21,825 INFO L225 Difference]: With dead ends: 55 [2018-02-04 12:11:21,825 INFO L226 Difference]: Without dead ends: 55 [2018-02-04 12:11:21,826 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 12:11:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-02-04 12:11:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2018-02-04 12:11:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-04 12:11:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-02-04 12:11:21,831 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2018-02-04 12:11:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:21,831 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-02-04 12:11:21,831 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-02-04 12:11:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-02-04 12:11:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-04 12:11:21,832 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:11:21,832 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] [2018-02-04 12:11:21,832 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-04 12:11:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1711563014, now seen corresponding path program 1 times [2018-02-04 12:11:21,832 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:11:21,832 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:11:21,833 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:21,833 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 12:11:21,833 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:11:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:11:21,841 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:11:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:11:21,868 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:11:21,868 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 12:11:21,868 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 12:11:21,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 12:11:21,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 12:11:21,869 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 4 states. [2018-02-04 12:11:21,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:11:21,892 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-02-04 12:11:21,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 12:11:21,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-02-04 12:11:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:11:21,892 INFO L225 Difference]: With dead ends: 45 [2018-02-04 12:11:21,892 INFO L226 Difference]: Without dead ends: 0 [2018-02-04 12:11:21,892 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 [2018-02-04 12:11:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-04 12:11:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-04 12:11:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-04 12:11:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-04 12:11:21,893 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-02-04 12:11:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:11:21,893 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-04 12:11:21,893 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 12:11:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-04 12:11:21,893 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-04 12:11:21,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 12:11:21 BoogieIcfgContainer [2018-02-04 12:11:21,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 12:11:21,897 INFO L168 Benchmark]: Toolchain (without parser) took 12368.41 ms. Allocated memory was 400.0 MB in the beginning and 674.2 MB in the end (delta: 274.2 MB). Free memory was 358.0 MB in the beginning and 440.6 MB in the end (delta: -82.6 MB). Peak memory consumption was 191.6 MB. Max. memory is 5.3 GB. [2018-02-04 12:11:21,897 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 400.0 MB. Free memory is still 363.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 12:11:21,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.97 ms. Allocated memory is still 400.0 MB. Free memory was 356.7 MB in the beginning and 347.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-04 12:11:21,898 INFO L168 Benchmark]: Boogie Preprocessor took 24.93 ms. Allocated memory is still 400.0 MB. Free memory was 347.5 MB in the beginning and 344.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-04 12:11:21,898 INFO L168 Benchmark]: RCFGBuilder took 131.05 ms. Allocated memory is still 400.0 MB. Free memory was 344.8 MB in the beginning and 330.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 5.3 GB. [2018-02-04 12:11:21,898 INFO L168 Benchmark]: TraceAbstraction took 12072.01 ms. Allocated memory was 400.0 MB in the beginning and 674.2 MB in the end (delta: 274.2 MB). Free memory was 330.1 MB in the beginning and 440.6 MB in the end (delta: -110.5 MB). Peak memory consumption was 163.7 MB. Max. memory is 5.3 GB. [2018-02-04 12:11:21,899 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 400.0 MB. Free memory is still 363.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 137.97 ms. Allocated memory is still 400.0 MB. Free memory was 356.7 MB in the beginning and 347.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 24.93 ms. Allocated memory is still 400.0 MB. Free memory was 347.5 MB in the beginning and 344.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 131.05 ms. Allocated memory is still 400.0 MB. Free memory was 344.8 MB in the beginning and 330.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 5.3 GB. * TraceAbstraction took 12072.01 ms. Allocated memory was 400.0 MB in the beginning and 674.2 MB in the end (delta: 274.2 MB). Free memory was 330.1 MB in the beginning and 440.6 MB in the end (delta: -110.5 MB). Peak memory consumption was 163.7 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, 12.0s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 10.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 176 SDtfs, 252 SDslu, 690 SDs, 0 SdLazy, 731 SolverSat, 126 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 7.6s 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, 0.0s 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-0-2018-02-04_12-11-21-904.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-0-2018-02-04_12-11-21-904.csv Received shutdown request...