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.epf -i ../../../trunk/examples/svcomp/array-memsafety/knapsack_alloca_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 15:10:37,596 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 15:10:37,598 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 15:10:37,610 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 15:10:37,611 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 15:10:37,612 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 15:10:37,613 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 15:10:37,614 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 15:10:37,616 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 15:10:37,617 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 15:10:37,618 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 15:10:37,618 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 15:10:37,619 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 15:10:37,619 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 15:10:37,620 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 15:10:37,623 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 15:10:37,625 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 15:10:37,627 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 15:10:37,629 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 15:10:37,630 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 15:10:37,633 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 15:10:37,633 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 15:10:37,633 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 15:10:37,634 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 15:10:37,635 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 15:10:37,637 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 15:10:37,637 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 15:10:37,638 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 15:10:37,638 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 15:10:37,638 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 15:10:37,639 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 15:10:37,639 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.epf [2018-01-24 15:10:37,650 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 15:10:37,651 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 15:10:37,651 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 15:10:37,652 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 15:10:37,652 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 15:10:37,652 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 15:10:37,652 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 15:10:37,653 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 15:10:37,653 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 15:10:37,653 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 15:10:37,654 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 15:10:37,654 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 15:10:37,654 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 15:10:37,654 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 15:10:37,654 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 15:10:37,654 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 15:10:37,655 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 15:10:37,655 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 15:10:37,655 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 15:10:37,655 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 15:10:37,655 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 15:10:37,656 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 15:10:37,656 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 15:10:37,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 15:10:37,656 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 15:10:37,656 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 15:10:37,657 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 15:10:37,657 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 15:10:37,657 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 15:10:37,657 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 15:10:37,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 15:10:37,657 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 15:10:37,658 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 15:10:37,658 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 15:10:37,659 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 15:10:37,694 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 15:10:37,703 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 15:10:37,707 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 15:10:37,708 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 15:10:37,708 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 15:10:37,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/knapsack_alloca_unsafe_false-valid-deref.i [2018-01-24 15:10:37,901 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 15:10:37,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 15:10:37,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 15:10:37,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 15:10:37,913 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 15:10:37,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:10:37" (1/1) ... [2018-01-24 15:10:37,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f336ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:37, skipping insertion in model container [2018-01-24 15:10:37,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 03:10:37" (1/1) ... [2018-01-24 15:10:37,930 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:10:37,969 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 15:10:38,095 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:10:38,114 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 15:10:38,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38 WrapperNode [2018-01-24 15:10:38,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 15:10:38,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 15:10:38,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 15:10:38,125 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 15:10:38,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (1/1) ... [2018-01-24 15:10:38,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (1/1) ... [2018-01-24 15:10:38,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (1/1) ... [2018-01-24 15:10:38,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (1/1) ... [2018-01-24 15:10:38,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (1/1) ... [2018-01-24 15:10:38,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (1/1) ... [2018-01-24 15:10:38,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (1/1) ... [2018-01-24 15:10:38,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 15:10:38,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 15:10:38,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 15:10:38,161 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 15:10:38,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (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 15:10:38,211 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 15:10:38,211 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 15:10:38,211 INFO L136 BoogieDeclarations]: Found implementation of procedure knapsack [2018-01-24 15:10:38,211 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 15:10:38,211 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 15:10:38,211 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 15:10:38,211 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 15:10:38,212 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 15:10:38,212 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 15:10:38,212 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 15:10:38,212 INFO L128 BoogieDeclarations]: Found specification of procedure knapsack [2018-01-24 15:10:38,212 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 15:10:38,212 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 15:10:38,213 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 15:10:38,550 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 15:10:38,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:10:38 BoogieIcfgContainer [2018-01-24 15:10:38,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 15:10:38,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 15:10:38,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 15:10:38,585 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 15:10:38,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 03:10:37" (1/3) ... [2018-01-24 15:10:38,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce5965a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:10:38, skipping insertion in model container [2018-01-24 15:10:38,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 03:10:38" (2/3) ... [2018-01-24 15:10:38,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce5965a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 03:10:38, skipping insertion in model container [2018-01-24 15:10:38,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 03:10:38" (3/3) ... [2018-01-24 15:10:38,589 INFO L105 eAbstractionObserver]: Analyzing ICFG knapsack_alloca_unsafe_false-valid-deref.i [2018-01-24 15:10:38,596 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 15:10:38,603 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-24 15:10:38,641 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 15:10:38,642 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 15:10:38,642 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 15:10:38,642 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 15:10:38,642 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 15:10:38,642 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 15:10:38,642 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 15:10:38,642 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 15:10:38,643 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 15:10:38,661 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2018-01-24 15:10:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 15:10:38,668 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:10:38,670 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:10:38,670 INFO L371 AbstractCegarLoop]: === Iteration 1 === [knapsackErr15RequiresViolation, knapsackErr10RequiresViolation, knapsackErr8RequiresViolation, knapsackErr11RequiresViolation, knapsackErr3RequiresViolation, knapsackErr18RequiresViolation, knapsackErr4RequiresViolation, knapsackErr6RequiresViolation, knapsackErr13RequiresViolation, knapsackErr17RequiresViolation, knapsackErr1RequiresViolation, knapsackErr9RequiresViolation, knapsackErr0RequiresViolation, knapsackErr16RequiresViolation, knapsackErr2RequiresViolation, knapsackErr14RequiresViolation, knapsackErr12RequiresViolation, knapsackErr7RequiresViolation, knapsackErr5RequiresViolation, knapsackErr19RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 15:10:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1838284533, now seen corresponding path program 1 times [2018-01-24 15:10:38,675 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:10:38,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:38,719 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:10:38,719 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:38,719 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:10:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 15:10:38,810 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 15:10:39,077 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 15:10:39,080 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 15:10:39,080 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 15:10:39,080 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 15:10:39,147 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 15:10:39,162 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 15:10:39,162 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 15:10:39,165 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 6 states. [2018-01-24 15:10:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 15:10:39,425 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2018-01-24 15:10:39,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 15:10:39,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-01-24 15:10:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 15:10:39,437 INFO L225 Difference]: With dead ends: 125 [2018-01-24 15:10:39,437 INFO L226 Difference]: Without dead ends: 67 [2018-01-24 15:10:39,441 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-24 15:10:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-24 15:10:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-24 15:10:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-24 15:10:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2018-01-24 15:10:39,478 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 23 [2018-01-24 15:10:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 15:10:39,479 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2018-01-24 15:10:39,479 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 15:10:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2018-01-24 15:10:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-24 15:10:39,480 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 15:10:39,480 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 15:10:39,480 INFO L371 AbstractCegarLoop]: === Iteration 2 === [knapsackErr15RequiresViolation, knapsackErr10RequiresViolation, knapsackErr8RequiresViolation, knapsackErr11RequiresViolation, knapsackErr3RequiresViolation, knapsackErr18RequiresViolation, knapsackErr4RequiresViolation, knapsackErr6RequiresViolation, knapsackErr13RequiresViolation, knapsackErr17RequiresViolation, knapsackErr1RequiresViolation, knapsackErr9RequiresViolation, knapsackErr0RequiresViolation, knapsackErr16RequiresViolation, knapsackErr2RequiresViolation, knapsackErr14RequiresViolation, knapsackErr12RequiresViolation, knapsackErr7RequiresViolation, knapsackErr5RequiresViolation, knapsackErr19RequiresViolation, mainErr0EnsuresViolation]=== [2018-01-24 15:10:39,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1838284534, now seen corresponding path program 1 times [2018-01-24 15:10:39,481 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 15:10:39,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:39,482 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 15:10:39,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 15:10:39,482 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 15:10:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 15:10:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-24 15:10:39,569 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-24 15:10:39,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.01 03:10:39 BoogieIcfgContainer [2018-01-24 15:10:39,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-24 15:10:39,610 INFO L168 Benchmark]: Toolchain (without parser) took 1708.51 ms. Allocated memory was 305.1 MB in the beginning and 460.3 MB in the end (delta: 155.2 MB). Free memory was 263.0 MB in the beginning and 406.4 MB in the end (delta: -143.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 5.3 GB. [2018-01-24 15:10:39,611 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 305.1 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 15:10:39,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.65 ms. Allocated memory is still 305.1 MB. Free memory was 262.0 MB in the beginning and 251.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. [2018-01-24 15:10:39,612 INFO L168 Benchmark]: Boogie Preprocessor took 36.26 ms. Allocated memory is still 305.1 MB. Free memory was 251.9 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-24 15:10:39,612 INFO L168 Benchmark]: RCFGBuilder took 420.98 ms. Allocated memory is still 305.1 MB. Free memory was 249.8 MB in the beginning and 226.8 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 5.3 GB. [2018-01-24 15:10:39,612 INFO L168 Benchmark]: TraceAbstraction took 1026.55 ms. Allocated memory was 305.1 MB in the beginning and 460.3 MB in the end (delta: 155.2 MB). Free memory was 225.8 MB in the beginning and 406.4 MB in the end (delta: -180.6 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-01-24 15:10:39,614 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 305.1 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 216.65 ms. Allocated memory is still 305.1 MB. Free memory was 262.0 MB in the beginning and 251.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.26 ms. Allocated memory is still 305.1 MB. Free memory was 251.9 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 420.98 ms. Allocated memory is still 305.1 MB. Free memory was 249.8 MB in the beginning and 226.8 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1026.55 ms. Allocated memory was 305.1 MB in the beginning and 460.3 MB in the end (delta: 155.2 MB). Free memory was 225.8 MB in the beginning and 406.4 MB in the end (delta: -180.6 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: [L555] int N = __VERIFIER_nondet_int(); [L556] int M = __VERIFIER_nondet_int(); [L557] COND FALSE !(N < 1) VAL [M=0, N=1] [L560] COND TRUE M < 1 [L561] M = 1 VAL [M=1, N=1] [L563] EXPR, FCALL __builtin_alloca (N * sizeof(int)) VAL [__builtin_alloca (N * sizeof(int))={6:0}, M=1, N=1] [L563] int *size = (int*) __builtin_alloca (N * sizeof(int)); VAL [__builtin_alloca (N * sizeof(int))={6:0}, M=1, N=1, size={6:0}] [L564] EXPR, FCALL __builtin_alloca (N * sizeof(int)) VAL [__builtin_alloca (N * sizeof(int))={6:0}, __builtin_alloca (N * sizeof(int))={10:0}, M=1, N=1, size={6:0}] [L564] int *val = (int*) __builtin_alloca (N * sizeof(int)); VAL [__builtin_alloca (N * sizeof(int))={6:0}, __builtin_alloca (N * sizeof(int))={10:0}, M=1, N=1, size={6:0}, val={10:0}] [L565] EXPR, FCALL __builtin_alloca (M * sizeof(int)) VAL [__builtin_alloca (M * sizeof(int))={8:0}, __builtin_alloca (N * sizeof(int))={6:0}, __builtin_alloca (N * sizeof(int))={10:0}, M=1, N=1, size={6:0}, val={10:0}] [L565] int *cost = (int*) __builtin_alloca (M * sizeof(int)); VAL [__builtin_alloca (M * sizeof(int))={8:0}, __builtin_alloca (N * sizeof(int))={6:0}, __builtin_alloca (N * sizeof(int))={10:0}, cost={8:0}, M=1, N=1, size={6:0}, val={10:0}] [L566] EXPR, FCALL __builtin_alloca (M * sizeof(int)) VAL [__builtin_alloca (M * sizeof(int))={7:0}, __builtin_alloca (M * sizeof(int))={8:0}, __builtin_alloca (N * sizeof(int))={6:0}, __builtin_alloca (N * sizeof(int))={10:0}, cost={8:0}, M=1, N=1, size={6:0}, val={10:0}] [L566] int *best = (int*) __builtin_alloca (M * sizeof(int)); VAL [__builtin_alloca (M * sizeof(int))={7:0}, __builtin_alloca (M * sizeof(int))={8:0}, __builtin_alloca (N * sizeof(int))={6:0}, __builtin_alloca (N * sizeof(int))={10:0}, best={7:0}, cost={8:0}, M=1, N=1, size={6:0}, val={10:0}] [L567] CALL knapsack(size, val, N, cost, best, M) VAL [\old(M)=1, \old(N)=1, best={7:0}, cost={8:0}, size={6:0}, val={10:0}] [L542] int i, j; [L543] j = 1 VAL [\old(M)=1, \old(N)=1, best={7:0}, best={7:0}, cost={8:0}, cost={8:0}, j=1, M=1, N=1, size={6:0}, size={6:0}, val={10:0}, val={10:0}] [L543] COND TRUE j <= N [L544] i = 1 VAL [\old(M)=1, \old(N)=1, best={7:0}, best={7:0}, cost={8:0}, cost={8:0}, i=1, j=1, M=1, N=1, size={6:0}, size={6:0}, val={10:0}, val={10:0}] [L544] COND TRUE i <= M VAL [\old(M)=1, \old(N)=1, best={7:0}, best={7:0}, cost={8:0}, cost={8:0}, i=1, j=1, M=1, N=1, size={6:0}, size={6:0}, val={10:0}, val={10:0}] [L545] FCALL size[j] VAL [\old(M)=1, \old(N)=1, best={7:0}, best={7:0}, cost={8:0}, cost={8:0}, i=1, j=1, M=1, N=1, size={6:0}, size={6:0}, val={10:0}, val={10:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 73 locations, 21 error locations. UNSAFE Result, 0.9s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 48 SDtfs, 85 SDslu, 109 SDs, 0 SdLazy, 114 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/knapsack_alloca_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-24_15-10-39-623.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/knapsack_alloca_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-24_15-10-39-623.csv Received shutdown request...