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_Array.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ccafca9-m [2018-02-04 01:41:08,321 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 01:41:08,322 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 01:41:08,332 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 01:41:08,333 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 01:41:08,333 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 01:41:08,334 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 01:41:08,335 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 01:41:08,336 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 01:41:08,337 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 01:41:08,338 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 01:41:08,338 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 01:41:08,339 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 01:41:08,340 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 01:41:08,341 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 01:41:08,343 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 01:41:08,344 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 01:41:08,346 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 01:41:08,347 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 01:41:08,348 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 01:41:08,350 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 01:41:08,354 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_Array.epf [2018-02-04 01:41:08,364 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 01:41:08,365 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 01:41:08,366 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 01:41:08,366 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 01:41:08,366 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 01:41:08,366 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 01:41:08,366 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 01:41:08,367 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 01:41:08,367 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 01:41:08,367 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 01:41:08,367 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 01:41:08,367 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 01:41:08,367 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 01:41:08,367 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-04 01:41:08,368 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 01:41:08,368 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 01:41:08,368 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 01:41:08,368 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 01:41:08,368 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 01:41:08,368 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 01:41:08,368 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 01:41:08,369 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 01:41:08,369 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-02-04 01:41:08,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 01:41:08,407 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 01:41:08,411 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 01:41:08,412 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 01:41:08,412 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 01:41:08,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-02-04 01:41:08,546 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 01:41:08,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 01:41:08,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 01:41:08,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 01:41:08,554 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 01:41:08,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,558 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 01:41:08, skipping insertion in model container [2018-02-04 01:41:08,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,573 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 01:41:08,606 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 01:41:08,690 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 01:41:08,702 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 01:41:08,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08 WrapperNode [2018-02-04 01:41:08,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 01:41:08,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 01:41:08,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 01:41:08,708 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 01:41:08,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (1/1) ... [2018-02-04 01:41:08,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 01:41:08,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 01:41:08,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 01:41:08,738 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 01:41:08,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (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 01:41:08,777 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 01:41:08,778 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 01:41:08,778 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 01:41:08,778 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 01:41:08,942 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 01:41:08,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 01:41:08 BoogieIcfgContainer [2018-02-04 01:41:08,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 01:41:08,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 01:41:08,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 01:41:08,946 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 01:41:08,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 01:41:08" (1/3) ... [2018-02-04 01:41:08,946 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 01:41:08, skipping insertion in model container [2018-02-04 01:41:08,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:41:08" (2/3) ... [2018-02-04 01:41:08,947 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 01:41:08, skipping insertion in model container [2018-02-04 01:41:08,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 01:41:08" (3/3) ... [2018-02-04 01:41:08,949 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-02-04 01:41:08,955 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-04 01:41:08,960 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-02-04 01:41:08,992 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 01:41:08,992 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 01:41:08,992 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-02-04 01:41:08,992 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-04 01:41:08,992 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 01:41:08,992 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 01:41:08,992 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 01:41:08,993 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 01:41:08,993 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 01:41:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-02-04 01:41:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-04 01:41:09,011 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:41:09,012 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 01:41:09,012 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 01:41:09,016 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-02-04 01:41:09,067 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 01:41:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:41:09,107 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:41:09,139 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 01:41:09,141 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 01:41:09,141 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-04 01:41:09,142 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 01:41:09,142 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 01:41:09,142 INFO L182 omatonBuilderFactory]: Interpolants [66#true, 67#false] [2018-02-04 01:41:09,143 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 01:41:09,143 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-02-04 01:41:09,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-02-04 01:41:09,152 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-04 01:41:09,153 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-02-04 01:41:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:41:09,167 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-02-04 01:41:09,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-02-04 01:41:09,168 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-02-04 01:41:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:41:09,174 INFO L225 Difference]: With dead ends: 63 [2018-02-04 01:41:09,175 INFO L226 Difference]: Without dead ends: 60 [2018-02-04 01:41:09,176 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 01:41:09,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-02-04 01:41:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-02-04 01:41:09,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-02-04 01:41:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-02-04 01:41:09,261 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-02-04 01:41:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:41:09,261 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-02-04 01:41:09,261 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-02-04 01:41:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-02-04 01:41:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 01:41:09,262 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:41:09,262 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 01:41:09,262 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 01:41:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-02-04 01:41:09,264 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 01:41:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:41:09,277 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:41:09,320 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 01:41:09,320 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 01:41:09,320 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 01:41:09,321 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 01:41:09,321 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 01:41:09,321 INFO L182 omatonBuilderFactory]: Interpolants [192#false, 193#(= 1 (select |#valid| |main_#t~malloc2.base|)), 194#(= 1 (select |#valid| main_~arr~0.base)), 191#true] [2018-02-04 01:41:09,321 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 01:41:09,323 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 01:41:09,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 01:41:09,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 01:41:09,323 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-02-04 01:41:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:41:09,394 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2018-02-04 01:41:09,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 01:41:09,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-04 01:41:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:41:09,396 INFO L225 Difference]: With dead ends: 56 [2018-02-04 01:41:09,396 INFO L226 Difference]: Without dead ends: 56 [2018-02-04 01:41:09,397 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 01:41:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-04 01:41:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-02-04 01:41:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-02-04 01:41:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-02-04 01:41:09,401 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-02-04 01:41:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:41:09,401 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-02-04 01:41:09,401 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 01:41:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-02-04 01:41:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 01:41:09,402 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:41:09,402 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 01:41:09,402 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 01:41:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-02-04 01:41:09,403 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 01:41:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:41:09,416 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:41:09,469 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 01:41:09,469 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 01:41:09,469 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 01:41:09,470 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 01:41:09,470 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 01:41:09,470 INFO L182 omatonBuilderFactory]: Interpolants [309#true, 310#false, 311#(<= 1 main_~length~0), 312#(and (<= 1 main_~length~0) (= main_~i~0 0))] [2018-02-04 01:41:09,470 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 01:41:09,471 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 01:41:09,471 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 01:41:09,471 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-04 01:41:09,471 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-02-04 01:41:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:41:09,536 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-02-04 01:41:09,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 01:41:09,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-04 01:41:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:41:09,537 INFO L225 Difference]: With dead ends: 68 [2018-02-04 01:41:09,537 INFO L226 Difference]: Without dead ends: 68 [2018-02-04 01:41:09,538 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 01:41:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-04 01:41:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-02-04 01:41:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-02-04 01:41:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-02-04 01:41:09,541 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-02-04 01:41:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:41:09,541 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-02-04 01:41:09,541 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 01:41:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-02-04 01:41:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 01:41:09,541 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:41:09,541 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 01:41:09,541 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 01:41:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-02-04 01:41:09,542 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 01:41:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 01:41:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 01:41:09,575 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 01:41:09,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 01:41:09 BoogieIcfgContainer [2018-02-04 01:41:09,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 01:41:09,592 INFO L168 Benchmark]: Toolchain (without parser) took 1044.83 ms. Allocated memory was 388.0 MB in the beginning and 586.2 MB in the end (delta: 198.2 MB). Free memory was 346.0 MB in the beginning and 525.7 MB in the end (delta: -179.8 MB). Peak memory consumption was 18.4 MB. Max. memory is 5.3 GB. [2018-02-04 01:41:09,592 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 388.0 MB. Free memory is still 351.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 01:41:09,593 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.28 ms. Allocated memory is still 388.0 MB. Free memory was 344.7 MB in the beginning and 334.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-04 01:41:09,593 INFO L168 Benchmark]: Boogie Preprocessor took 29.92 ms. Allocated memory is still 388.0 MB. Free memory was 334.1 MB in the beginning and 332.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-04 01:41:09,593 INFO L168 Benchmark]: RCFGBuilder took 204.83 ms. Allocated memory is still 388.0 MB. Free memory was 332.8 MB in the beginning and 310.3 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. [2018-02-04 01:41:09,593 INFO L168 Benchmark]: TraceAbstraction took 647.39 ms. Allocated memory was 388.0 MB in the beginning and 586.2 MB in the end (delta: 198.2 MB). Free memory was 310.3 MB in the beginning and 525.7 MB in the end (delta: -215.5 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 01:41:09,595 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 388.0 MB. Free memory is still 351.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 159.28 ms. Allocated memory is still 388.0 MB. Free memory was 344.7 MB in the beginning and 334.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 29.92 ms. Allocated memory is still 388.0 MB. Free memory was 334.1 MB in the beginning and 332.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 204.83 ms. Allocated memory is still 388.0 MB. Free memory was 332.8 MB in the beginning and 310.3 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 647.39 ms. Allocated memory was 388.0 MB in the beginning and 586.2 MB in the end (delta: 198.2 MB). Free memory was 310.3 MB in the beginning and 525.7 MB in the end (delta: -215.5 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