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_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_alloca_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-25 02:31:28,033 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-25 02:31:28,036 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-25 02:31:28,053 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-25 02:31:28,053 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-25 02:31:28,054 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-25 02:31:28,056 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-25 02:31:28,060 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-25 02:31:28,063 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-25 02:31:28,065 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-25 02:31:28,066 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-25 02:31:28,067 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-25 02:31:28,068 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-25 02:31:28,069 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-25 02:31:28,070 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-25 02:31:28,073 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-25 02:31:28,075 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-25 02:31:28,077 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-25 02:31:28,079 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-25 02:31:28,080 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-25 02:31:28,083 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-25 02:31:28,083 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-25 02:31:28,083 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-25 02:31:28,084 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-25 02:31:28,085 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-25 02:31:28,087 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-25 02:31:28,087 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-25 02:31:28,088 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-25 02:31:28,088 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-25 02:31:28,088 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-25 02:31:28,089 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-25 02:31:28,089 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-25 02:31:28,106 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-25 02:31:28,106 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-25 02:31:28,107 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-25 02:31:28,107 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-25 02:31:28,107 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-25 02:31:28,108 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-25 02:31:28,108 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-25 02:31:28,108 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-25 02:31:28,108 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-25 02:31:28,109 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-25 02:31:28,109 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-25 02:31:28,109 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-25 02:31:28,110 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-25 02:31:28,110 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-25 02:31:28,110 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-25 02:31:28,110 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-25 02:31:28,110 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-25 02:31:28,110 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-25 02:31:28,111 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-25 02:31:28,111 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-25 02:31:28,111 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-25 02:31:28,111 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-25 02:31:28,111 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-25 02:31:28,112 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-25 02:31:28,112 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-25 02:31:28,112 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-25 02:31:28,112 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-25 02:31:28,112 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-25 02:31:28,113 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-25 02:31:28,113 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-25 02:31:28,113 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-25 02:31:28,113 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-25 02:31:28,113 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-25 02:31:28,114 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-25 02:31:28,114 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-25 02:31:28,115 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-25 02:31:28,115 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-25 02:31:28,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-25 02:31:28,196 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-25 02:31:28,202 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-25 02:31:28,204 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-25 02:31:28,205 INFO L276 PluginConnector]: CDTParser initialized [2018-01-25 02:31:28,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_alloca_unsafe_false-valid-deref.i [2018-01-25 02:31:28,393 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-25 02:31:28,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-25 02:31:28,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-25 02:31:28,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-25 02:31:28,405 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-25 02:31:28,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1365a45b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28, skipping insertion in model container [2018-01-25 02:31:28,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,427 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:31:28,468 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-25 02:31:28,596 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:31:28,613 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-25 02:31:28,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28 WrapperNode [2018-01-25 02:31:28,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-25 02:31:28,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-25 02:31:28,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-25 02:31:28,623 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-25 02:31:28,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (1/1) ... [2018-01-25 02:31:28,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-25 02:31:28,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-25 02:31:28,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-25 02:31:28,664 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-25 02:31:28,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (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 [2018-01-25 02:31:28,734 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-25 02:31:28,734 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-25 02:31:28,735 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-25 02:31:28,735 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-25 02:31:28,735 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-25 02:31:28,735 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-25 02:31:28,735 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-25 02:31:28,735 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-25 02:31:28,736 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-25 02:31:28,736 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-25 02:31:28,736 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-25 02:31:28,736 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-25 02:31:29,130 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-25 02:31:29,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:31:29 BoogieIcfgContainer [2018-01-25 02:31:29,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-25 02:31:29,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-25 02:31:29,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-25 02:31:29,134 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-25 02:31:29,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.01 02:31:28" (1/3) ... [2018-01-25 02:31:29,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0b33fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:31:29, skipping insertion in model container [2018-01-25 02:31:29,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.01 02:31:28" (2/3) ... [2018-01-25 02:31:29,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0b33fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.01 02:31:29, skipping insertion in model container [2018-01-25 02:31:29,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.01 02:31:29" (3/3) ... [2018-01-25 02:31:29,138 INFO L105 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe_false-valid-deref.i [2018-01-25 02:31:29,145 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-25 02:31:29,153 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-25 02:31:29,225 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-25 02:31:29,225 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-25 02:31:29,225 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-25 02:31:29,225 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-25 02:31:29,225 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-25 02:31:29,226 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-25 02:31:29,226 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-25 02:31:29,226 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-25 02:31:29,227 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-25 02:31:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-01-25 02:31:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-25 02:31:29,275 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:31:29,277 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:31:29,277 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]=== [2018-01-25 02:31:29,282 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-01-25 02:31:29,284 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:31:29,326 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:29,326 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:31:29,327 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:29,327 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:31:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:31:29,400 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:31:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:31:29,438 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:31:29,439 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-25 02:31:29,439 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:31:29,441 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-25 02:31:29,452 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-25 02:31:29,452 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-25 02:31:29,454 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-01-25 02:31:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:31:29,554 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2018-01-25 02:31:29,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-25 02:31:29,556 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-25 02:31:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:31:29,564 INFO L225 Difference]: With dead ends: 101 [2018-01-25 02:31:29,564 INFO L226 Difference]: Without dead ends: 60 [2018-01-25 02:31:29,567 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 [2018-01-25 02:31:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-25 02:31:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-25 02:31:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-25 02:31:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-01-25 02:31:29,598 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-01-25 02:31:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:31:29,598 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-01-25 02:31:29,598 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-25 02:31:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-01-25 02:31:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 02:31:29,599 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:31:29,599 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:31:29,599 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]=== [2018-01-25 02:31:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-01-25 02:31:29,600 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:31:29,601 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:29,601 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:31:29,602 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:29,602 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:31:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:31:29,620 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:31:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:31:29,684 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:31:29,684 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-25 02:31:29,684 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:31:29,685 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:31:29,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:31:29,686 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:31:29,686 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-01-25 02:31:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:31:29,849 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-01-25 02:31:29,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:31:29,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 02:31:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:31:29,851 INFO L225 Difference]: With dead ends: 60 [2018-01-25 02:31:29,851 INFO L226 Difference]: Without dead ends: 56 [2018-01-25 02:31:29,852 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 [2018-01-25 02:31:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-25 02:31:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-01-25 02:31:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-25 02:31:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-01-25 02:31:29,860 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-01-25 02:31:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:31:29,861 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-01-25 02:31:29,861 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:31:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-01-25 02:31:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 02:31:29,862 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:31:29,862 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:31:29,862 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]=== [2018-01-25 02:31:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-01-25 02:31:29,862 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:31:29,864 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:29,864 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:31:29,864 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:29,864 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:31:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:31:29,884 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:31:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:31:29,951 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:31:29,951 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-25 02:31:29,952 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:31:29,952 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-25 02:31:29,952 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-25 02:31:29,952 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-01-25 02:31:29,953 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-01-25 02:31:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:31:30,014 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2018-01-25 02:31:30,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-25 02:31:30,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-25 02:31:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:31:30,016 INFO L225 Difference]: With dead ends: 102 [2018-01-25 02:31:30,017 INFO L226 Difference]: Without dead ends: 68 [2018-01-25 02:31:30,017 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 [2018-01-25 02:31:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-25 02:31:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-01-25 02:31:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-25 02:31:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-25 02:31:30,024 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-01-25 02:31:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:31:30,025 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-25 02:31:30,025 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-25 02:31:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-25 02:31:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-25 02:31:30,025 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:31:30,025 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:31:30,025 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]=== [2018-01-25 02:31:30,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-01-25 02:31:30,026 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:31:30,027 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:30,027 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:31:30,027 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:30,027 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:31:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-25 02:31:30,038 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-25 02:31:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-25 02:31:30,160 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-25 02:31:30,160 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-25 02:31:30,160 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-25 02:31:30,160 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-25 02:31:30,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-25 02:31:30,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-01-25 02:31:30,161 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 6 states. [2018-01-25 02:31:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-25 02:31:30,324 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-01-25 02:31:30,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-25 02:31:30,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-01-25 02:31:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-25 02:31:30,326 INFO L225 Difference]: With dead ends: 68 [2018-01-25 02:31:30,326 INFO L226 Difference]: Without dead ends: 65 [2018-01-25 02:31:30,326 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-01-25 02:31:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-01-25 02:31:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2018-01-25 02:31:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-01-25 02:31:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2018-01-25 02:31:30,332 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 13 [2018-01-25 02:31:30,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-25 02:31:30,332 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2018-01-25 02:31:30,332 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-25 02:31:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2018-01-25 02:31:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-25 02:31:30,332 INFO L314 BasicCegarLoop]: Found error trace [2018-01-25 02:31:30,333 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-25 02:31:30,333 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]=== [2018-01-25 02:31:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1619006049, now seen corresponding path program 1 times [2018-01-25 02:31:30,333 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-25 02:31:30,334 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:30,334 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-25 02:31:30,334 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-25 02:31:30,334 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-25 02:31:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-25 02:31:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-25 02:31:30,390 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-25 02:31:30,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.01 02:31:30 BoogieIcfgContainer [2018-01-25 02:31:30,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-25 02:31:30,411 INFO L168 Benchmark]: Toolchain (without parser) took 2017.31 ms. Allocated memory was 301.5 MB in the beginning and 456.7 MB in the end (delta: 155.2 MB). Free memory was 259.8 MB in the beginning and 370.4 MB in the end (delta: -110.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 5.3 GB. [2018-01-25 02:31:30,412 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 301.5 MB. Free memory is still 265.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-25 02:31:30,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.39 ms. Allocated memory is still 301.5 MB. Free memory was 258.8 MB in the beginning and 248.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-01-25 02:31:30,412 INFO L168 Benchmark]: Boogie Preprocessor took 40.12 ms. Allocated memory is still 301.5 MB. Free memory was 248.6 MB in the beginning and 246.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-25 02:31:30,412 INFO L168 Benchmark]: RCFGBuilder took 467.86 ms. Allocated memory is still 301.5 MB. Free memory was 246.6 MB in the beginning and 227.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. [2018-01-25 02:31:30,413 INFO L168 Benchmark]: TraceAbstraction took 1277.74 ms. Allocated memory was 301.5 MB in the beginning and 456.7 MB in the end (delta: 155.2 MB). Free memory was 227.0 MB in the beginning and 370.4 MB in the end (delta: -143.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 5.3 GB. [2018-01-25 02:31:30,415 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 301.5 MB. Free memory is still 265.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 222.39 ms. Allocated memory is still 301.5 MB. Free memory was 258.8 MB in the beginning and 248.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 40.12 ms. Allocated memory is still 301.5 MB. Free memory was 248.6 MB in the beginning and 246.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 467.86 ms. Allocated memory is still 301.5 MB. Free memory was 246.6 MB in the beginning and 227.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1277.74 ms. Allocated memory was 301.5 MB in the beginning and 456.7 MB in the end (delta: 155.2 MB). Free memory was 227.0 MB in the beginning and 370.4 MB in the end (delta: -143.3 MB). Peak memory consumption was 11.9 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