java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 10:35:59,632 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 10:35:59,633 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 10:35:59,643 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 10:35:59,643 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 10:35:59,643 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 10:35:59,644 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 10:35:59,646 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 10:35:59,648 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 10:35:59,648 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 10:35:59,649 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 10:35:59,649 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 10:35:59,650 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 10:35:59,651 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 10:35:59,652 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 10:35:59,654 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 10:35:59,655 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 10:35:59,656 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 10:35:59,657 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 10:35:59,658 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 10:35:59,660 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 10:35:59,665 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf [2018-02-02 10:35:59,675 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 10:35:59,675 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 10:35:59,676 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 10:35:59,676 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 10:35:59,676 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 10:35:59,676 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 10:35:59,677 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 10:35:59,677 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 10:35:59,677 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 10:35:59,677 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 10:35:59,677 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 10:35:59,677 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 10:35:59,677 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 10:35:59,678 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 10:35:59,678 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 10:35:59,678 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 10:35:59,678 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 10:35:59,678 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 10:35:59,678 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 10:35:59,679 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 10:35:59,679 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 10:35:59,679 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 10:35:59,679 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-02-02 10:35:59,679 INFO L133 SettingsManager]: * SMT solver=Internal_SMTInterpol_NoArrayInterpol [2018-02-02 10:35:59,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 10:35:59,716 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 10:35:59,719 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 10:35:59,721 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 10:35:59,721 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 10:35:59,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-02-02 10:35:59,828 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 10:35:59,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 10:35:59,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 10:35:59,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 10:35:59,836 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 10:35:59,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:35:59,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af2d12f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59, skipping insertion in model container [2018-02-02 10:35:59,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:35:59,848 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 10:35:59,876 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 10:35:59,965 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 10:35:59,981 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 10:35:59,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59 WrapperNode [2018-02-02 10:35:59,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 10:35:59,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 10:35:59,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 10:35:59,988 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 10:36:00,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:36:00,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:36:00,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:36:00,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:36:00,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:36:00,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:36:00,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... [2018-02-02 10:36:00,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 10:36:00,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 10:36:00,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 10:36:00,020 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 10:36:00,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (1/1) ... No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 10:36:00,064 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 10:36:00,064 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 10:36:00,064 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 10:36:00,064 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 10:36:00,064 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 10:36:00,064 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 10:36:00,064 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 10:36:00,065 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 10:36:00,065 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 10:36:00,065 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 10:36:00,065 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 10:36:00,065 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 10:36:00,241 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 10:36:00,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 10:36:00 BoogieIcfgContainer [2018-02-02 10:36:00,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 10:36:00,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 10:36:00,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 10:36:00,244 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 10:36:00,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 10:35:59" (1/3) ... [2018-02-02 10:36:00,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7938ea28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 10:36:00, skipping insertion in model container [2018-02-02 10:36:00,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:35:59" (2/3) ... [2018-02-02 10:36:00,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7938ea28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 10:36:00, skipping insertion in model container [2018-02-02 10:36:00,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 10:36:00" (3/3) ... [2018-02-02 10:36:00,247 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-02-02 10:36:00,253 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-02 10:36:00,258 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-02-02 10:36:00,290 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 10:36:00,291 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 10:36:00,291 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-02-02 10:36:00,291 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-02 10:36:00,291 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 10:36:00,291 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 10:36:00,291 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 10:36:00,291 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 10:36:00,292 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 10:36:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-02-02 10:36:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-02 10:36:00,309 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:36:00,310 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:36:00,311 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]=== [2018-02-02 10:36:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-02-02 10:36:00,351 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:36:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:36:00,392 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 10:36:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,424 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 10:36:00,424 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-02 10:36:00,425 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 10:36:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,426 INFO L182 omatonBuilderFactory]: Interpolants [66#true, 67#false] [2018-02-02 10:36:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,427 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-02-02 10:36:00,435 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-02-02 10:36:00,435 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-02 10:36:00,437 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-02-02 10:36:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 10:36:00,452 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-02-02 10:36:00,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-02-02 10:36:00,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-02-02 10:36:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 10:36:00,460 INFO L225 Difference]: With dead ends: 63 [2018-02-02 10:36:00,460 INFO L226 Difference]: Without dead ends: 60 [2018-02-02 10:36:00,461 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 [2018-02-02 10:36:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-02-02 10:36:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-02-02 10:36:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-02-02 10:36:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-02-02 10:36:00,541 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-02-02 10:36:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 10:36:00,542 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-02-02 10:36:00,542 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-02-02 10:36:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-02-02 10:36:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 10:36:00,542 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:36:00,542 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:36:00,542 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]=== [2018-02-02 10:36:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-02-02 10:36:00,543 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:36:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:36:00,556 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 10:36:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,598 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 10:36:00,599 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 10:36:00,599 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 10:36:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,600 INFO L182 omatonBuilderFactory]: Interpolants [192#false, 193#(= 1 (select |#valid| |main_#t~malloc2.base|)), 194#(= 1 (select |#valid| main_~arr~0.base)), 191#true] [2018-02-02 10:36:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,601 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 10:36:00,602 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 10:36:00,602 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 10:36:00,602 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-02-02 10:36:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 10:36:00,680 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2018-02-02 10:36:00,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 10:36:00,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 10:36:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 10:36:00,681 INFO L225 Difference]: With dead ends: 56 [2018-02-02 10:36:00,681 INFO L226 Difference]: Without dead ends: 56 [2018-02-02 10:36:00,683 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 10:36:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-02 10:36:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-02-02 10:36:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-02-02 10:36:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-02-02 10:36:00,687 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-02-02 10:36:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 10:36:00,687 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-02-02 10:36:00,687 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 10:36:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-02-02 10:36:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 10:36:00,688 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:36:00,688 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:36:00,688 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]=== [2018-02-02 10:36:00,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-02-02 10:36:00,689 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:36:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:36:00,701 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 10:36:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,742 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 10:36:00,742 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 10:36:00,742 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 10:36:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,743 INFO L182 omatonBuilderFactory]: Interpolants [309#true, 310#false, 311#(<= 1 main_~length~0), 312#(and (<= 1 main_~length~0) (= main_~i~0 0))] [2018-02-02 10:36:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 10:36:00,743 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 10:36:00,744 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 10:36:00,744 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 10:36:00,744 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-02-02 10:36:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 10:36:00,791 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-02-02 10:36:00,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 10:36:00,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 10:36:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 10:36:00,793 INFO L225 Difference]: With dead ends: 68 [2018-02-02 10:36:00,793 INFO L226 Difference]: Without dead ends: 68 [2018-02-02 10:36:00,793 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 [2018-02-02 10:36:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-02 10:36:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-02-02 10:36:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-02-02 10:36:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-02-02 10:36:00,799 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-02-02 10:36:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 10:36:00,799 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-02-02 10:36:00,799 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 10:36:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-02-02 10:36:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 10:36:00,800 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:36:00,800 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:36:00,800 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]=== [2018-02-02 10:36:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-02-02 10:36:00,801 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:36:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 10:36:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 10:36:00,840 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-02 10:36:00,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 10:36:00 BoogieIcfgContainer [2018-02-02 10:36:00,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 10:36:00,857 INFO L168 Benchmark]: Toolchain (without parser) took 1027.63 ms. Allocated memory was 403.2 MB in the beginning and 613.4 MB in the end (delta: 210.2 MB). Free memory was 361.0 MB in the beginning and 553.0 MB in the end (delta: -192.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 5.3 GB. [2018-02-02 10:36:00,858 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 403.2 MB. Free memory is still 366.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 10:36:00,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.90 ms. Allocated memory is still 403.2 MB. Free memory was 359.6 MB in the beginning and 349.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-02 10:36:00,858 INFO L168 Benchmark]: Boogie Preprocessor took 31.89 ms. Allocated memory is still 403.2 MB. Free memory was 349.1 MB in the beginning and 347.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-02 10:36:00,859 INFO L168 Benchmark]: RCFGBuilder took 222.08 ms. Allocated memory is still 403.2 MB. Free memory was 347.8 MB in the beginning and 325.2 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. [2018-02-02 10:36:00,859 INFO L168 Benchmark]: TraceAbstraction took 613.94 ms. Allocated memory was 403.2 MB in the beginning and 613.4 MB in the end (delta: 210.2 MB). Free memory was 325.2 MB in the beginning and 553.0 MB in the end (delta: -227.7 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 10:36:00,860 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 403.2 MB. Free memory is still 366.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 156.90 ms. Allocated memory is still 403.2 MB. Free memory was 359.6 MB in the beginning and 349.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 31.89 ms. Allocated memory is still 403.2 MB. Free memory was 349.1 MB in the beginning and 347.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 222.08 ms. Allocated memory is still 403.2 MB. Free memory was 347.8 MB in the beginning and 325.2 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 613.94 ms. Allocated memory was 403.2 MB in the beginning and 613.4 MB in the end (delta: 210.2 MB). Free memory was 325.2 MB in the beginning and 553.0 MB in the end (delta: -227.7 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