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.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_alloca_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 11:39:08,034 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 11:39:08,037 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 11:39:08,053 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 11:39:08,054 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 11:39:08,055 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 11:39:08,056 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 11:39:08,058 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 11:39:08,060 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 11:39:08,061 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 11:39:08,061 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 11:39:08,062 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 11:39:08,062 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 11:39:08,063 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 11:39:08,064 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 11:39:08,067 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 11:39:08,069 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 11:39:08,071 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 11:39:08,073 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 11:39:08,074 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 11:39:08,077 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 11:39:08,077 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 11:39:08,077 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 11:39:08,079 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 11:39:08,080 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 11:39:08,081 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 11:39:08,081 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 11:39:08,082 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 11:39:08,082 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 11:39:08,082 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 11:39:08,083 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 11:39:08,084 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.epf [2018-01-24 11:39:08,093 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 11:39:08,094 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 11:39:08,095 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 11:39:08,095 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 11:39:08,095 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 11:39:08,095 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 11:39:08,095 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 11:39:08,096 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 11:39:08,096 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 11:39:08,096 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 11:39:08,096 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 11:39:08,097 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 11:39:08,097 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 11:39:08,097 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 11:39:08,097 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 11:39:08,097 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 11:39:08,098 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 11:39:08,098 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 11:39:08,098 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 11:39:08,098 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 11:39:08,098 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 11:39:08,099 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 11:39:08,099 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 11:39:08,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 11:39:08,099 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 11:39:08,099 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 11:39:08,100 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 11:39:08,100 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 11:39:08,100 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-24 11:39:08,100 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 11:39:08,100 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 11:39:08,101 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 11:39:08,101 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 11:39:08,102 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 11:39:08,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 11:39:08,150 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 11:39:08,154 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 11:39:08,156 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 11:39:08,156 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 11:39:08,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_alloca_unsafe_false-valid-deref.i [2018-01-24 11:39:08,324 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 11:39:08,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 11:39:08,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 11:39:08,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 11:39:08,335 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 11:39:08,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e47ad9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08, skipping insertion in model container [2018-01-24 11:39:08,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,354 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:39:08,393 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 11:39:08,512 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:39:08,527 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 11:39:08,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08 WrapperNode [2018-01-24 11:39:08,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 11:39:08,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 11:39:08,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 11:39:08,534 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 11:39:08,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (1/1) ... [2018-01-24 11:39:08,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 11:39:08,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 11:39:08,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 11:39:08,570 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 11:39:08,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (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 [2018-01-24 11:39:08,624 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 11:39:08,624 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 11:39:08,624 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 11:39:08,624 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 11:39:08,624 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 11:39:08,624 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 11:39:08,624 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 11:39:08,625 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 11:39:08,625 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 11:39:08,625 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 11:39:08,625 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 11:39:08,625 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 11:39:08,909 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 11:39:08,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:39:08 BoogieIcfgContainer [2018-01-24 11:39:08,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 11:39:08,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 11:39:08,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 11:39:08,912 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 11:39:08,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:39:08" (1/3) ... [2018-01-24 11:39:08,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef12bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:39:08, skipping insertion in model container [2018-01-24 11:39:08,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:39:08" (2/3) ... [2018-01-24 11:39:08,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef12bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:39:08, skipping insertion in model container [2018-01-24 11:39:08,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:39:08" (3/3) ... [2018-01-24 11:39:08,915 INFO L105 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe_false-valid-deref.i [2018-01-24 11:39:08,922 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 11:39:08,929 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-24 11:39:08,976 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 11:39:08,977 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 11:39:08,977 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 11:39:08,977 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 11:39:08,977 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 11:39:08,978 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 11:39:08,978 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 11:39:08,978 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 11:39:08,979 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 11:39:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-24 11:39:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-24 11:39:09,006 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:39:09,007 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:39:09,007 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]=== [2018-01-24 11:39:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-01-24 11:39:09,014 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:39:09,015 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:39:09,072 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,073 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:39:09,073 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:39:09,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:39:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:39:09,172 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:39:09,173 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 11:39:09,174 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-24 11:39:09,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-24 11:39:09,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-24 11:39:09,188 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-01-24 11:39:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:39:09,211 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2018-01-24 11:39:09,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-24 11:39:09,212 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-24 11:39:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:39:09,308 INFO L225 Difference]: With dead ends: 101 [2018-01-24 11:39:09,309 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 11:39:09,313 INFO L525 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 [2018-01-24 11:39:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 11:39:09,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-24 11:39:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 11:39:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-01-24 11:39:09,350 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-01-24 11:39:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:39:09,350 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-01-24 11:39:09,350 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-24 11:39:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-01-24 11:39:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 11:39:09,351 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:39:09,351 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:39:09,351 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]=== [2018-01-24 11:39:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-01-24 11:39:09,352 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:39:09,352 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:39:09,352 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,353 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:39:09,353 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:39:09,368 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:39:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:39:09,433 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:39:09,434 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 11:39:09,435 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:39:09,436 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:39:09,436 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:39:09,436 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-01-24 11:39:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:39:09,575 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-01-24 11:39:09,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 11:39:09,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 11:39:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:39:09,578 INFO L225 Difference]: With dead ends: 60 [2018-01-24 11:39:09,578 INFO L226 Difference]: Without dead ends: 56 [2018-01-24 11:39:09,579 INFO L525 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 [2018-01-24 11:39:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-24 11:39:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-24 11:39:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-24 11:39:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-01-24 11:39:09,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-01-24 11:39:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:39:09,587 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-01-24 11:39:09,587 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:39:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-01-24 11:39:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 11:39:09,588 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:39:09,588 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:39:09,588 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]=== [2018-01-24 11:39:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-01-24 11:39:09,589 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:39:09,589 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:39:09,590 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,590 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:39:09,590 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:39:09,609 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:39:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:39:09,670 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:39:09,670 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 11:39:09,671 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 11:39:09,671 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 11:39:09,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-24 11:39:09,671 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-01-24 11:39:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:39:09,731 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2018-01-24 11:39:09,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 11:39:09,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 11:39:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:39:09,733 INFO L225 Difference]: With dead ends: 102 [2018-01-24 11:39:09,733 INFO L226 Difference]: Without dead ends: 68 [2018-01-24 11:39:09,734 INFO L525 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 [2018-01-24 11:39:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-24 11:39:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-01-24 11:39:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-24 11:39:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-24 11:39:09,741 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-01-24 11:39:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:39:09,741 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-24 11:39:09,742 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 11:39:09,742 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-24 11:39:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 11:39:09,742 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:39:09,742 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:39:09,742 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]=== [2018-01-24 11:39:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-01-24 11:39:09,743 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:39:09,743 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:39:09,743 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,744 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:39:09,744 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 11:39:09,756 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 11:39:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 11:39:09,885 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 11:39:09,886 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 11:39:09,886 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 11:39:09,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 11:39:09,886 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-24 11:39:09,886 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 6 states. [2018-01-24 11:39:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 11:39:10,063 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-01-24 11:39:10,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 11:39:10,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-01-24 11:39:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 11:39:10,064 INFO L225 Difference]: With dead ends: 68 [2018-01-24 11:39:10,064 INFO L226 Difference]: Without dead ends: 65 [2018-01-24 11:39:10,065 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-24 11:39:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-24 11:39:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2018-01-24 11:39:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-24 11:39:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2018-01-24 11:39:10,069 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 13 [2018-01-24 11:39:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 11:39:10,070 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2018-01-24 11:39:10,070 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 11:39:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2018-01-24 11:39:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-24 11:39:10,070 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 11:39:10,070 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 11:39:10,070 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr13RequiresViolation, mainErr1RequiresViolation, mainErr17RequiresViolation, mainErr20EnsuresViolation, mainErr9RequiresViolation, mainErr18RequiresViolation, mainErr0RequiresViolation, mainErr3RequiresViolation, mainErr7RequiresViolation, mainErr11RequiresViolation, mainErr8RequiresViolation, mainErr10RequiresViolation, mainErr15RequiresViolation, mainErr16RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr12RequiresViolation, mainErr6RequiresViolation, mainErr14RequiresViolation, mainErr19RequiresViolation]=== [2018-01-24 11:39:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1619006049, now seen corresponding path program 1 times [2018-01-24 11:39:10,071 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-24 11:39:10,071 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-24 11:39:10,071 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:10,072 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 11:39:10,072 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 11:39:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 11:39:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 11:39:10,117 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 11:39:10,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 11:39:10 BoogieIcfgContainer [2018-01-24 11:39:10,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 11:39:10,139 INFO L168 Benchmark]: Toolchain (without parser) took 1814.71 ms. Allocated memory was 308.3 MB in the beginning and 474.5 MB in the end (delta: 166.2 MB). Free memory was 268.3 MB in the beginning and 389.0 MB in the end (delta: -120.7 MB). Peak memory consumption was 45.5 MB. Max. memory is 5.3 GB. [2018-01-24 11:39:10,140 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 308.3 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 11:39:10,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.54 ms. Allocated memory is still 308.3 MB. Free memory was 267.3 MB in the beginning and 257.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-24 11:39:10,140 INFO L168 Benchmark]: Boogie Preprocessor took 35.40 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 11:39:10,140 INFO L168 Benchmark]: RCFGBuilder took 340.54 ms. Allocated memory is still 308.3 MB. Free memory was 255.2 MB in the beginning and 235.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. [2018-01-24 11:39:10,141 INFO L168 Benchmark]: TraceAbstraction took 1227.48 ms. Allocated memory was 308.3 MB in the beginning and 474.5 MB in the end (delta: 166.2 MB). Free memory was 235.6 MB in the beginning and 389.0 MB in the end (delta: -153.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 5.3 GB. [2018-01-24 11:39:10,142 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 308.3 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 204.54 ms. Allocated memory is still 308.3 MB. Free memory was 267.3 MB in the beginning and 257.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 35.40 ms. Allocated memory is still 308.3 MB. Free memory was 257.2 MB in the beginning and 255.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 340.54 ms. Allocated memory is still 308.3 MB. Free memory was 255.2 MB in the beginning and 235.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1227.48 ms. Allocated memory was 308.3 MB in the beginning and 474.5 MB in the end (delta: 166.2 MB). Free memory was 235.6 MB in the beginning and 389.0 MB in the end (delta: -153.4 MB). Peak memory consumption was 12.8 MB. 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*sizeof(int)) VAL [__builtin_alloca (length*sizeof(int))={5:0}, length=1] [L545] int *arr = __builtin_alloca (length*sizeof(int)); [L546] i=0 VAL [__builtin_alloca (length*sizeof(int))={5:0}, arr={5:0}, i=0, length=1] [L546] COND TRUE i