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/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-5f7ec6e [2018-01-31 08:19:00,395 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-31 08:19:00,396 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-31 08:19:00,410 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-31 08:19:00,410 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-31 08:19:00,411 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-31 08:19:00,413 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-31 08:19:00,414 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-31 08:19:00,416 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-31 08:19:00,417 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-31 08:19:00,417 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-31 08:19:00,418 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-31 08:19:00,419 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-31 08:19:00,420 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-31 08:19:00,421 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-31 08:19:00,423 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-31 08:19:00,425 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-31 08:19:00,427 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-31 08:19:00,429 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-31 08:19:00,430 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-31 08:19:00,432 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-31 08:19:00,437 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-31 08:19:00,438 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-31 08:19:00,438 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel+AI_EQ_SS.epf [2018-01-31 08:19:00,449 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-31 08:19:00,450 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-31 08:19:00,450 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-31 08:19:00,451 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-31 08:19:00,451 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-31 08:19:00,451 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-31 08:19:00,451 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-31 08:19:00,452 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-31 08:19:00,452 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-31 08:19:00,452 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-31 08:19:00,453 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-31 08:19:00,453 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-31 08:19:00,453 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-31 08:19:00,453 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-31 08:19:00,454 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-31 08:19:00,454 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-31 08:19:00,454 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-31 08:19:00,454 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-31 08:19:00,454 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-31 08:19:00,455 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-31 08:19:00,455 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-31 08:19:00,455 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-31 08:19:00,455 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-31 08:19:00,455 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-31 08:19:00,456 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-31 08:19:00,456 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-31 08:19:00,456 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-31 08:19:00,456 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-31 08:19:00,457 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-31 08:19:00,457 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-31 08:19:00,457 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-31 08:19:00,457 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-31 08:19:00,458 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-31 08:19:00,458 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-31 08:19:00,509 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-31 08:19:00,526 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-31 08:19:00,530 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-31 08:19:00,531 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-31 08:19:00,532 INFO L276 PluginConnector]: CDTParser initialized [2018-01-31 08:19:00,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i [2018-01-31 08:19:00,719 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-31 08:19:00,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-31 08:19:00,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-31 08:19:00,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-31 08:19:00,741 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-31 08:19:00,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:19:00" (1/1) ... [2018-01-31 08:19:00,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f69a0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:00, skipping insertion in model container [2018-01-31 08:19:00,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:19:00" (1/1) ... [2018-01-31 08:19:00,766 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-31 08:19:00,819 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-31 08:19:00,993 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-31 08:19:01,019 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-31 08:19:01,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01 WrapperNode [2018-01-31 08:19:01,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-31 08:19:01,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-31 08:19:01,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-31 08:19:01,043 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-31 08:19:01,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... [2018-01-31 08:19:01,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... [2018-01-31 08:19:01,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... [2018-01-31 08:19:01,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... [2018-01-31 08:19:01,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... [2018-01-31 08:19:01,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... [2018-01-31 08:19:01,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... [2018-01-31 08:19:01,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-31 08:19:01,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-31 08:19:01,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-31 08:19:01,086 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-31 08:19:01,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (1/1) ... No working directory specified, using /storage/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 [2018-01-31 08:19:01,160 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-31 08:19:01,161 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-31 08:19:01,161 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-31 08:19:01,161 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-31 08:19:01,161 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-31 08:19:01,161 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-31 08:19:01,161 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-31 08:19:01,161 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-31 08:19:01,162 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-31 08:19:01,162 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-31 08:19:01,162 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-31 08:19:01,162 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-31 08:19:01,632 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-31 08:19:01,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:19:01 BoogieIcfgContainer [2018-01-31 08:19:01,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-31 08:19:01,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-31 08:19:01,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-31 08:19:01,639 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-31 08:19:01,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:19:00" (1/3) ... [2018-01-31 08:19:01,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d30cc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:19:01, skipping insertion in model container [2018-01-31 08:19:01,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:19:01" (2/3) ... [2018-01-31 08:19:01,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d30cc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:19:01, skipping insertion in model container [2018-01-31 08:19:01,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:19:01" (3/3) ... [2018-01-31 08:19:01,644 INFO L107 eAbstractionObserver]: Analyzing ICFG count_down_unsafe_false-valid-deref.i [2018-01-31 08:19:01,653 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-31 08:19:01,662 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-01-31 08:19:01,721 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-31 08:19:01,721 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-31 08:19:01,721 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-31 08:19:01,721 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-31 08:19:01,721 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-31 08:19:01,721 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-31 08:19:01,722 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-31 08:19:01,722 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-31 08:19:01,722 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-31 08:19:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-01-31 08:19:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-31 08:19:01,751 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 08:19:01,752 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 08:19:01,752 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-31 08:19:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1229773359, now seen corresponding path program 1 times [2018-01-31 08:19:01,760 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 08:19:01,760 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 08:19:01,817 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:01,817 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 08:19:01,818 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 08:19:01,895 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 08:19:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 08:19:02,065 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 08:19:02,065 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-31 08:19:02,067 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-31 08:19:02,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-31 08:19:02,078 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-31 08:19:02,081 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2018-01-31 08:19:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 08:19:02,356 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2018-01-31 08:19:02,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-31 08:19:02,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-31 08:19:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 08:19:02,365 INFO L225 Difference]: With dead ends: 94 [2018-01-31 08:19:02,365 INFO L226 Difference]: Without dead ends: 58 [2018-01-31 08:19:02,369 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-31 08:19:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-01-31 08:19:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-01-31 08:19:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-31 08:19:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-01-31 08:19:02,402 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 20 [2018-01-31 08:19:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 08:19:02,403 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2018-01-31 08:19:02,403 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-31 08:19:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2018-01-31 08:19:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-31 08:19:02,404 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 08:19:02,404 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 08:19:02,404 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-31 08:19:02,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1445043224, now seen corresponding path program 1 times [2018-01-31 08:19:02,405 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 08:19:02,405 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 08:19:02,406 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:02,406 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 08:19:02,406 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 08:19:02,419 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 08:19:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 08:19:02,566 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 08:19:02,566 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-31 08:19:02,568 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-31 08:19:02,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-31 08:19:02,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-31 08:19:02,570 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2018-01-31 08:19:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 08:19:02,855 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-01-31 08:19:02,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-31 08:19:02,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-31 08:19:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 08:19:02,857 INFO L225 Difference]: With dead ends: 58 [2018-01-31 08:19:02,858 INFO L226 Difference]: Without dead ends: 54 [2018-01-31 08:19:02,859 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-31 08:19:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-31 08:19:02,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-31 08:19:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-31 08:19:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-01-31 08:19:02,866 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 24 [2018-01-31 08:19:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 08:19:02,869 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-01-31 08:19:02,869 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-31 08:19:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-01-31 08:19:02,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-31 08:19:02,870 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 08:19:02,870 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 08:19:02,870 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-31 08:19:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1445043223, now seen corresponding path program 1 times [2018-01-31 08:19:02,871 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 08:19:02,871 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 08:19:02,872 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:02,874 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 08:19:02,874 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-31 08:19:02,896 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-31 08:19:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-31 08:19:03,002 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-31 08:19:03,002 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-31 08:19:03,002 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-31 08:19:03,005 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-31 08:19:03,005 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-31 08:19:03,005 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 4 states. [2018-01-31 08:19:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-31 08:19:03,072 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-01-31 08:19:03,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-31 08:19:03,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-01-31 08:19:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-31 08:19:03,073 INFO L225 Difference]: With dead ends: 89 [2018-01-31 08:19:03,073 INFO L226 Difference]: Without dead ends: 65 [2018-01-31 08:19:03,074 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 [2018-01-31 08:19:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-31 08:19:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2018-01-31 08:19:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-31 08:19:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-31 08:19:03,085 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 24 [2018-01-31 08:19:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-31 08:19:03,085 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-31 08:19:03,085 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-31 08:19:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-31 08:19:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-01-31 08:19:03,086 INFO L343 BasicCegarLoop]: Found error trace [2018-01-31 08:19:03,086 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-31 08:19:03,086 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-01-31 08:19:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1406967281, now seen corresponding path program 1 times [2018-01-31 08:19:03,087 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-31 08:19:03,087 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-31 08:19:03,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:03,088 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-31 08:19:03,088 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-31 08:19:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-31 08:19:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-31 08:19:03,150 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-01-31 08:19:03,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:19:03 BoogieIcfgContainer [2018-01-31 08:19:03,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-31 08:19:03,186 INFO L168 Benchmark]: Toolchain (without parser) took 2466.02 ms. Allocated memory was 308.8 MB in the beginning and 470.3 MB in the end (delta: 161.5 MB). Free memory was 267.7 MB in the beginning and 407.7 MB in the end (delta: -140.0 MB). Peak memory consumption was 21.5 MB. Max. memory is 5.3 GB. [2018-01-31 08:19:03,187 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 308.8 MB. Free memory is still 273.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-31 08:19:03,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.72 ms. Allocated memory is still 308.8 MB. Free memory was 267.7 MB in the beginning and 257.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-31 08:19:03,188 INFO L168 Benchmark]: Boogie Preprocessor took 42.10 ms. Allocated memory is still 308.8 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-31 08:19:03,188 INFO L168 Benchmark]: RCFGBuilder took 547.62 ms. Allocated memory is still 308.8 MB. Free memory was 255.7 MB in the beginning and 236.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 5.3 GB. [2018-01-31 08:19:03,188 INFO L168 Benchmark]: TraceAbstraction took 1551.37 ms. Allocated memory was 308.8 MB in the beginning and 470.3 MB in the end (delta: 161.5 MB). Free memory was 236.7 MB in the beginning and 407.7 MB in the end (delta: -171.0 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-31 08:19:03,190 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 308.8 MB. Free memory is still 273.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 311.72 ms. Allocated memory is still 308.8 MB. Free memory was 267.7 MB in the beginning and 257.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 42.10 ms. Allocated memory is still 308.8 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 547.62 ms. Allocated memory is still 308.8 MB. Free memory was 255.7 MB in the beginning and 236.7 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1551.37 ms. Allocated memory was 308.8 MB in the beginning and 470.3 MB in the end (delta: 161.5 MB). Free memory was 236.7 MB in the beginning and 407.7 MB in the end (delta: -171.0 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; [L542] int val; [L543] int length = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=2, length=2] [L544] COND FALSE !(length < 1) VAL [length=2] [L545] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={3:0}, length=2] [L545] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=2] [L546] COND FALSE !(!arr) VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=2] [L547] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=2] [L547] COND TRUE i