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/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cceb4a [2018-01-29 22:33:35,764 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-29 22:33:35,765 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-29 22:33:35,779 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-29 22:33:35,780 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-29 22:33:35,781 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-29 22:33:35,782 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-29 22:33:35,783 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-29 22:33:35,785 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-29 22:33:35,785 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-29 22:33:35,786 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-29 22:33:35,786 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-29 22:33:35,787 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-29 22:33:35,788 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-29 22:33:35,789 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-29 22:33:35,791 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-29 22:33:35,794 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-29 22:33:35,796 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-29 22:33:35,797 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-29 22:33:35,799 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-29 22:33:35,801 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-29 22:33:35,801 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-29 22:33:35,802 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-29 22:33:35,803 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-29 22:33:35,804 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-29 22:33:35,805 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-29 22:33:35,805 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-29 22:33:35,806 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-29 22:33:35,806 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-29 22:33:35,806 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-29 22:33:35,807 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-29 22:33:35,807 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 [2018-01-29 22:33:35,817 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-29 22:33:35,817 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-29 22:33:35,818 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-29 22:33:35,818 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-29 22:33:35,819 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-29 22:33:35,819 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-29 22:33:35,819 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-29 22:33:35,820 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-29 22:33:35,820 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-29 22:33:35,820 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-29 22:33:35,820 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-29 22:33:35,820 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-29 22:33:35,820 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-29 22:33:35,821 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-29 22:33:35,821 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-29 22:33:35,821 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-29 22:33:35,821 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-29 22:33:35,821 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-29 22:33:35,822 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-29 22:33:35,822 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-01-29 22:33:35,822 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-29 22:33:35,822 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-29 22:33:35,822 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-29 22:33:35,823 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-29 22:33:35,823 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-29 22:33:35,823 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-29 22:33:35,823 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-29 22:33:35,823 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-29 22:33:35,824 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-29 22:33:35,824 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-29 22:33:35,824 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-29 22:33:35,824 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-29 22:33:35,825 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-29 22:33:35,825 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-29 22:33:35,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-29 22:33:35,875 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-29 22:33:35,879 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-29 22:33:35,881 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-29 22:33:35,881 INFO L276 PluginConnector]: CDTParser initialized [2018-01-29 22:33:35,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-01-29 22:33:36,043 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-29 22:33:36,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-29 22:33:36,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-29 22:33:36,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-29 22:33:36,059 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-29 22:33:36,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba793f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36, skipping insertion in model container [2018-01-29 22:33:36,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,082 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:33:36,123 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-29 22:33:36,239 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:33:36,256 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-29 22:33:36,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36 WrapperNode [2018-01-29 22:33:36,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-29 22:33:36,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-29 22:33:36,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-29 22:33:36,264 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-29 22:33:36,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (1/1) ... [2018-01-29 22:33:36,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-29 22:33:36,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-29 22:33:36,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-29 22:33:36,297 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-29 22:33:36,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (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 [2018-01-29 22:33:36,354 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-29 22:33:36,354 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-29 22:33:36,354 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-29 22:33:36,354 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-29 22:33:36,354 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-29 22:33:36,354 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-29 22:33:36,354 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-29 22:33:36,354 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-29 22:33:36,355 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-29 22:33:36,355 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-29 22:33:36,355 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-29 22:33:36,355 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-29 22:33:36,664 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-29 22:33:36,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:33:36 BoogieIcfgContainer [2018-01-29 22:33:36,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-29 22:33:36,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-29 22:33:36,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-29 22:33:36,669 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-29 22:33:36,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.01 10:33:36" (1/3) ... [2018-01-29 22:33:36,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681cd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:33:36, skipping insertion in model container [2018-01-29 22:33:36,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.01 10:33:36" (2/3) ... [2018-01-29 22:33:36,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681cd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.01 10:33:36, skipping insertion in model container [2018-01-29 22:33:36,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.01 10:33:36" (3/3) ... [2018-01-29 22:33:36,673 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-01-29 22:33:36,680 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-29 22:33:36,687 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-29 22:33:36,726 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-29 22:33:36,726 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-29 22:33:36,726 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-29 22:33:36,726 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-29 22:33:36,727 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-29 22:33:36,727 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-29 22:33:36,727 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-29 22:33:36,727 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-29 22:33:36,728 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-29 22:33:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2018-01-29 22:33:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-29 22:33:36,752 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:36,753 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:36,753 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]=== [2018-01-29 22:33:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -623242573, now seen corresponding path program 1 times [2018-01-29 22:33:36,759 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:36,760 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:36,801 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:36,802 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:36,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:33:36,861 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:33:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:33:36,902 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:33:36,902 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-29 22:33:36,904 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-29 22:33:36,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-29 22:33:36,916 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-29 22:33:36,918 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 2 states. [2018-01-29 22:33:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:33:36,946 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2018-01-29 22:33:36,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-29 22:33:36,947 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-01-29 22:33:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:33:37,039 INFO L225 Difference]: With dead ends: 143 [2018-01-29 22:33:37,040 INFO L226 Difference]: Without dead ends: 89 [2018-01-29 22:33:37,044 INFO L553 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 [2018-01-29 22:33:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-01-29 22:33:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-01-29 22:33:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-01-29 22:33:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2018-01-29 22:33:37,081 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 19 [2018-01-29 22:33:37,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:33:37,082 INFO L432 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2018-01-29 22:33:37,082 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-29 22:33:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2018-01-29 22:33:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-29 22:33:37,083 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:37,083 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:37,083 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]=== [2018-01-29 22:33:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2140680272, now seen corresponding path program 1 times [2018-01-29 22:33:37,083 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:37,083 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:37,084 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:37,084 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:37,085 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:33:37,103 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:33:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:33:37,181 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:33:37,181 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-29 22:33:37,183 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 22:33:37,183 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 22:33:37,184 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:33:37,184 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 4 states. [2018-01-29 22:33:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:33:37,277 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-01-29 22:33:37,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-29 22:33:37,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-29 22:33:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:33:37,279 INFO L225 Difference]: With dead ends: 89 [2018-01-29 22:33:37,279 INFO L226 Difference]: Without dead ends: 85 [2018-01-29 22:33:37,280 INFO L553 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 [2018-01-29 22:33:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-01-29 22:33:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-01-29 22:33:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-01-29 22:33:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2018-01-29 22:33:37,289 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 20 [2018-01-29 22:33:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:33:37,289 INFO L432 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2018-01-29 22:33:37,289 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 22:33:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2018-01-29 22:33:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-29 22:33:37,290 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:37,290 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:37,290 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]=== [2018-01-29 22:33:37,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2140680271, now seen corresponding path program 1 times [2018-01-29 22:33:37,291 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:37,291 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:37,291 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:37,292 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:37,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-29 22:33:37,307 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-29 22:33:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-29 22:33:37,354 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-29 22:33:37,355 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-29 22:33:37,355 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-29 22:33:37,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-29 22:33:37,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-29 22:33:37,356 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 4 states. [2018-01-29 22:33:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-29 22:33:37,438 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2018-01-29 22:33:37,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-29 22:33:37,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-01-29 22:33:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-29 22:33:37,441 INFO L225 Difference]: With dead ends: 215 [2018-01-29 22:33:37,441 INFO L226 Difference]: Without dead ends: 168 [2018-01-29 22:33:37,442 INFO L553 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 [2018-01-29 22:33:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-01-29 22:33:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 90. [2018-01-29 22:33:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-01-29 22:33:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2018-01-29 22:33:37,452 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 20 [2018-01-29 22:33:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-29 22:33:37,452 INFO L432 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2018-01-29 22:33:37,452 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-29 22:33:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2018-01-29 22:33:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-29 22:33:37,453 INFO L342 BasicCegarLoop]: Found error trace [2018-01-29 22:33:37,454 INFO L350 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-29 22:33:37,454 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]=== [2018-01-29 22:33:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2140680235, now seen corresponding path program 1 times [2018-01-29 22:33:37,454 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-29 22:33:37,454 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-29 22:33:37,455 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:37,455 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-29 22:33:37,456 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-29 22:33:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-29 22:33:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-29 22:33:37,509 INFO L409 BasicCegarLoop]: Counterexample might be feasible [2018-01-29 22:33:37,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.01 10:33:37 BoogieIcfgContainer [2018-01-29 22:33:37,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-29 22:33:37,529 INFO L168 Benchmark]: Toolchain (without parser) took 1486.23 ms. Allocated memory was 309.9 MB in the beginning and 474.0 MB in the end (delta: 164.1 MB). Free memory was 268.6 MB in the beginning and 408.6 MB in the end (delta: -140.0 MB). Peak memory consumption was 24.1 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:37,530 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 309.9 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-29 22:33:37,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.05 ms. Allocated memory is still 309.9 MB. Free memory was 268.6 MB in the beginning and 258.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:37,531 INFO L168 Benchmark]: Boogie Preprocessor took 32.35 ms. Allocated memory is still 309.9 MB. Free memory was 258.6 MB in the beginning and 256.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:37,531 INFO L168 Benchmark]: RCFGBuilder took 368.76 ms. Allocated memory is still 309.9 MB. Free memory was 256.6 MB in the beginning and 233.7 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 5.3 GB. [2018-01-29 22:33:37,531 INFO L168 Benchmark]: TraceAbstraction took 862.40 ms. Allocated memory was 309.9 MB in the beginning and 474.0 MB in the end (delta: 164.1 MB). Free memory was 233.7 MB in the beginning and 408.6 MB in the end (delta: -174.9 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-29 22:33:37,533 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 309.9 MB. Free memory is still 274.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 213.05 ms. Allocated memory is still 309.9 MB. Free memory was 268.6 MB in the beginning and 258.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 32.35 ms. Allocated memory is still 309.9 MB. Free memory was 258.6 MB in the beginning and 256.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 368.76 ms. Allocated memory is still 309.9 MB. Free memory was 256.6 MB in the beginning and 233.7 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 862.40 ms. Allocated memory was 309.9 MB in the beginning and 474.0 MB in the end (delta: 164.1 MB). Free memory was 233.7 MB in the beginning and 408.6 MB in the end (delta: -174.9 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(); VAL [__VERIFIER_nondet_int()=1, length=1] [L543] COND FALSE !(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); VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=1] [L546] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L546] COND TRUE i