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_SmtInterpol_NoArray.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 17:16:49,422 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 17:16:49,423 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 17:16:49,435 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 17:16:49,435 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 17:16:49,436 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 17:16:49,437 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 17:16:49,438 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 17:16:49,440 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 17:16:49,441 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 17:16:49,442 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 17:16:49,442 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 17:16:49,442 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 17:16:49,443 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 17:16:49,444 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 17:16:49,446 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 17:16:49,447 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 17:16:49,449 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 17:16:49,450 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 17:16:49,451 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 17:16:49,453 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 17:16:49,457 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 17:16:49,457 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 17:16:49,457 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf [2018-02-04 17:16:49,466 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 17:16:49,467 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 17:16:49,467 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 17:16:49,468 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 17:16:49,468 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 17:16:49,469 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 17:16:49,469 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 17:16:49,469 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 17:16:49,469 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 17:16:49,469 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 17:16:49,469 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 17:16:49,469 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 17:16:49,469 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 17:16:49,469 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 17:16:49,470 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 17:16:49,470 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 17:16:49,470 INFO L133 SettingsManager]: * Trace refinement strategy=SMTINTERPOL [2018-02-04 17:16:49,497 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 17:16:49,505 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 17:16:49,507 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 17:16:49,508 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 17:16:49,508 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 17:16:49,509 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-02-04 17:16:49,632 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 17:16:49,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 17:16:49,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 17:16:49,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 17:16:49,639 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 17:16:49,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a67664e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49, skipping insertion in model container [2018-02-04 17:16:49,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,656 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 17:16:49,683 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 17:16:49,781 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 17:16:49,793 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 17:16:49,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49 WrapperNode [2018-02-04 17:16:49,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 17:16:49,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 17:16:49,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 17:16:49,799 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 17:16:49,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (1/1) ... [2018-02-04 17:16:49,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 17:16:49,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 17:16:49,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 17:16:49,824 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 17:16:49,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (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 17:16:49,865 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 17:16:49,865 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 17:16:49,865 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 17:16:49,865 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 17:16:49,865 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 17:16:49,865 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 17:16:49,865 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 17:16:49,865 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 17:16:49,865 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 17:16:49,866 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 17:16:49,866 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 17:16:49,866 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 17:16:50,020 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 17:16:50,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 05:16:50 BoogieIcfgContainer [2018-02-04 17:16:50,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 17:16:50,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 17:16:50,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 17:16:50,023 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 17:16:50,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 05:16:49" (1/3) ... [2018-02-04 17:16:50,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5843d236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 05:16:50, skipping insertion in model container [2018-02-04 17:16:50,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:16:49" (2/3) ... [2018-02-04 17:16:50,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5843d236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 05:16:50, skipping insertion in model container [2018-02-04 17:16:50,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 05:16:50" (3/3) ... [2018-02-04 17:16:50,026 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-02-04 17:16:50,031 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 17:16:50,036 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-02-04 17:16:50,066 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 17:16:50,066 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 17:16:50,066 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 17:16:50,066 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 17:16:50,066 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 17:16:50,067 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 17:16:50,067 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 17:16:50,067 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 17:16:50,068 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 17:16:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-02-04 17:16:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-04 17:16:50,090 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:16:50,091 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 17:16:50,091 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-04 17:16:50,095 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-02-04 17:16:50,097 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:16:50,098 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:16:50,142 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,142 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:16:50,143 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:16:50,195 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:16:50,225 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 17:16:50,227 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:16:50,227 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-04 17:16:50,228 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-02-04 17:16:50,239 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-02-04 17:16:50,240 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-04 17:16:50,242 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-02-04 17:16:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:16:50,258 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-02-04 17:16:50,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-02-04 17:16:50,315 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-02-04 17:16:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:16:50,324 INFO L225 Difference]: With dead ends: 63 [2018-02-04 17:16:50,325 INFO L226 Difference]: Without dead ends: 60 [2018-02-04 17:16:50,326 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-04 17:16:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-02-04 17:16:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-02-04 17:16:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-02-04 17:16:50,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-02-04 17:16:50,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-02-04 17:16:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:16:50,359 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-02-04 17:16:50,359 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-02-04 17:16:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-02-04 17:16:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 17:16:50,360 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:16:50,360 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 17:16:50,360 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-04 17:16:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-02-04 17:16:50,361 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:16:50,361 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:16:50,362 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,362 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:16:50,362 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:16:50,375 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:16:50,427 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 17:16:50,427 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:16:50,427 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 17:16:50,428 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 17:16:50,428 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 17:16:50,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 17:16:50,429 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-02-04 17:16:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:16:50,506 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2018-02-04 17:16:50,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 17:16:50,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-04 17:16:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:16:50,508 INFO L225 Difference]: With dead ends: 56 [2018-02-04 17:16:50,508 INFO L226 Difference]: Without dead ends: 56 [2018-02-04 17:16:50,509 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 17:16:50,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-04 17:16:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-02-04 17:16:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-02-04 17:16:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-02-04 17:16:50,513 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-02-04 17:16:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:16:50,514 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-02-04 17:16:50,514 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 17:16:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-02-04 17:16:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 17:16:50,515 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:16:50,515 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 17:16:50,515 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-04 17:16:50,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-02-04 17:16:50,515 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:16:50,515 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:16:50,516 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,517 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:16:50,517 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:16:50,531 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:16:50,574 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 17:16:50,574 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:16:50,574 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 17:16:50,575 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 17:16:50,575 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 17:16:50,575 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-04 17:16:50,575 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-02-04 17:16:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:16:50,633 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-02-04 17:16:50,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 17:16:50,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-04 17:16:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:16:50,635 INFO L225 Difference]: With dead ends: 68 [2018-02-04 17:16:50,635 INFO L226 Difference]: Without dead ends: 68 [2018-02-04 17:16:50,635 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-04 17:16:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-04 17:16:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-02-04 17:16:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-02-04 17:16:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-02-04 17:16:50,640 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-02-04 17:16:50,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:16:50,640 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-02-04 17:16:50,640 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 17:16:50,641 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-02-04 17:16:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 17:16:50,641 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:16:50,641 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 17:16:50,641 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-02-04 17:16:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-02-04 17:16:50,642 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:16:50,642 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:16:50,643 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,643 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:16:50,643 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:16:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 17:16:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 17:16:50,684 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 17:16:50,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 05:16:50 BoogieIcfgContainer [2018-02-04 17:16:50,701 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 17:16:50,702 INFO L168 Benchmark]: Toolchain (without parser) took 1069.23 ms. Allocated memory was 403.7 MB in the beginning and 615.5 MB in the end (delta: 211.8 MB). Free memory was 361.9 MB in the beginning and 554.5 MB in the end (delta: -192.6 MB). Peak memory consumption was 19.2 MB. Max. memory is 5.3 GB. [2018-02-04 17:16:50,703 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 403.7 MB. Free memory is still 367.2 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 17:16:50,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.97 ms. Allocated memory is still 403.7 MB. Free memory was 360.6 MB in the beginning and 350.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-04 17:16:50,703 INFO L168 Benchmark]: Boogie Preprocessor took 24.58 ms. Allocated memory is still 403.7 MB. Free memory was 350.0 MB in the beginning and 348.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-04 17:16:50,704 INFO L168 Benchmark]: RCFGBuilder took 196.95 ms. Allocated memory is still 403.7 MB. Free memory was 348.7 MB in the beginning and 326.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 5.3 GB. [2018-02-04 17:16:50,704 INFO L168 Benchmark]: TraceAbstraction took 679.75 ms. Allocated memory was 403.7 MB in the beginning and 615.5 MB in the end (delta: 211.8 MB). Free memory was 326.7 MB in the beginning and 554.5 MB in the end (delta: -227.8 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 17:16:50,706 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 403.7 MB. Free memory is still 367.2 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 164.97 ms. Allocated memory is still 403.7 MB. Free memory was 360.6 MB in the beginning and 350.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 24.58 ms. Allocated memory is still 403.7 MB. Free memory was 350.0 MB in the beginning and 348.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 196.95 ms. Allocated memory is still 403.7 MB. Free memory was 348.7 MB in the beginning and 326.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 679.75 ms. Allocated memory was 403.7 MB in the beginning and 615.5 MB in the end (delta: 211.8 MB). Free memory was 326.7 MB in the beginning and 554.5 MB in the end (delta: -227.8 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j, tmp; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 [L543] length = 1 VAL [length=1] [L544] COND FALSE !(length % 2 == 0) VAL [length=1] [L545] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={3:0}, length=1] [L545] int *arr = __builtin_alloca (length); [L546] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L546] COND TRUE i