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/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf -i ../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ccafca9-m [2018-02-04 04:22:48,097 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 04:22:48,098 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 04:22:48,111 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 04:22:48,111 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 04:22:48,112 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 04:22:48,113 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 04:22:48,114 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 04:22:48,116 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 04:22:48,116 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 04:22:48,117 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 04:22:48,117 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 04:22:48,118 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 04:22:48,119 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 04:22:48,120 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 04:22:48,122 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 04:22:48,123 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 04:22:48,125 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 04:22:48,126 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 04:22:48,127 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 04:22:48,129 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-04 04:22:48,129 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-04 04:22:48,130 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-04 04:22:48,131 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-04 04:22:48,131 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-04 04:22:48,132 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-04 04:22:48,132 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-04 04:22:48,133 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-04 04:22:48,133 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-04 04:22:48,133 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 04:22:48,133 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 04:22:48,134 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf [2018-02-04 04:22:48,143 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 04:22:48,143 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 04:22:48,144 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 04:22:48,144 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 04:22:48,144 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 04:22:48,144 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 04:22:48,144 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 04:22:48,144 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 04:22:48,145 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 04:22:48,145 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 04:22:48,146 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 04:22:48,146 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 04:22:48,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 04:22:48,146 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 04:22:48,146 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-02-04 04:22:48,146 INFO L133 SettingsManager]: * SMT solver=External_Z3InterpolationMode [2018-02-04 04:22:48,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 04:22:48,179 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 04:22:48,201 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 04:22:48,204 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 04:22:48,205 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 04:22:48,206 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 04:22:48,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/count_down_unsafe_false-valid-deref.i [2018-02-04 04:22:48,330 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 04:22:48,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 04:22:48,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 04:22:48,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 04:22:48,338 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 04:22:48,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d3ffa22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48, skipping insertion in model container [2018-02-04 04:22:48,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,356 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 04:22:48,384 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 04:22:48,476 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 04:22:48,487 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 04:22:48,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48 WrapperNode [2018-02-04 04:22:48,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 04:22:48,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 04:22:48,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 04:22:48,494 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 04:22:48,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... [2018-02-04 04:22:48,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 04:22:48,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 04:22:48,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 04:22:48,520 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 04:22:48,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-04 04:22:48,554 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 04:22:48,554 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 04:22:48,554 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 04:22:48,554 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 04:22:48,555 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 04:22:48,703 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 04:22:48,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 04:22:48 BoogieIcfgContainer [2018-02-04 04:22:48,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 04:22:48,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 04:22:48,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 04:22:48,706 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 04:22:48,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 04:22:48" (1/3) ... [2018-02-04 04:22:48,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46618f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 04:22:48, skipping insertion in model container [2018-02-04 04:22:48,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:22:48" (2/3) ... [2018-02-04 04:22:48,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46618f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 04:22:48, skipping insertion in model container [2018-02-04 04:22:48,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 04:22:48" (3/3) ... [2018-02-04 04:22:48,708 INFO L107 eAbstractionObserver]: Analyzing ICFG count_down_unsafe_false-valid-deref.i [2018-02-04 04:22:48,713 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-04 04:22:48,718 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-02-04 04:22:48,752 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 04:22:48,752 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 04:22:48,753 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-02-04 04:22:48,753 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-04 04:22:48,753 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 04:22:48,753 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 04:22:48,753 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 04:22:48,753 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 04:22:48,754 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 04:22:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-02-04 04:22:48,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 04:22:48,774 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:22:48,775 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:22:48,775 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-04 04:22:48,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1460855103, now seen corresponding path program 1 times No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 04:22:48,788 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 04:22:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:22:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:22:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 04:22:48,879 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:22:48,880 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-04 04:22:48,880 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 04:22:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 04:22:48,881 INFO L182 omatonBuilderFactory]: Interpolants [48#false, 52#(not (= 0 |main_#t~malloc1.base|)), 53#(not (= 0 main_~arr~0.base)), 54#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)), 47#true] [2018-02-04 04:22:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 04:22:48,882 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 04:22:48,889 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 04:22:48,890 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-04 04:22:48,891 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2018-02-04 04:22:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:22:49,065 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-02-04 04:22:49,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-04 04:22:49,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-02-04 04:22:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:22:49,074 INFO L225 Difference]: With dead ends: 42 [2018-02-04 04:22:49,074 INFO L226 Difference]: Without dead ends: 39 [2018-02-04 04:22:49,076 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-02-04 04:22:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-02-04 04:22:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-02-04 04:22:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-04 04:22:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-02-04 04:22:49,100 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2018-02-04 04:22:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:22:49,101 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-02-04 04:22:49,101 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 04:22:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-02-04 04:22:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-04 04:22:49,101 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:22:49,101 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:22:49,101 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-04 04:22:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1955174720, now seen corresponding path program 1 times No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 04:22:49,106 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 04:22:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:22:49,115 WARN L195 Executor]: ExternalInterpolator (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in) stderr output: WARNING: array quantifier [2018-02-04 04:22:49,117 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:22:49,117 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:22:49,118 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:22:49,118 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:22:49,148 WARN L1033 $PredicateComparison]: unable to prove that (exists ((%0 (Array Int Int))) (! (forall ((%1 Int)) (! (= (store |c_#valid| %1 1) (store %0 %1 1)) :qid itp)) :qid itp)) is different from true [2018-02-04 04:22:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:22:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 04:22:49,194 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:22:49,194 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-04 04:22:49,194 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 04:22:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 04:22:49,195 INFO L182 omatonBuilderFactory]: Interpolants [145#(exists ((%0 (Array Int Int))) (! (forall ((%1 Int)) (! (= (store |#valid| %1 1) (store %0 %1 1)) :qid itp)) :qid itp)), 146#(= 1 (select |#valid| |main_#t~malloc1.base|)), 147#(= 1 (select |#valid| main_~arr~0.base)), 148#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)), 140#true, 141#false] [2018-02-04 04:22:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 04:22:49,196 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-04 04:22:49,197 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-04 04:22:49,197 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2018-02-04 04:22:49,197 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 6 states. [2018-02-04 04:22:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:22:49,405 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2018-02-04 04:22:49,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-04 04:22:49,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-02-04 04:22:49,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:22:49,407 INFO L225 Difference]: With dead ends: 75 [2018-02-04 04:22:49,407 INFO L226 Difference]: Without dead ends: 75 [2018-02-04 04:22:49,408 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=28, Unknown=2, NotChecked=10, Total=56 [2018-02-04 04:22:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-02-04 04:22:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2018-02-04 04:22:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-02-04 04:22:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2018-02-04 04:22:49,413 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 14 [2018-02-04 04:22:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:22:49,413 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2018-02-04 04:22:49,413 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-04 04:22:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2018-02-04 04:22:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-04 04:22:49,414 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:22:49,414 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:22:49,414 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-04 04:22:49,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1955174719, now seen corresponding path program 1 times No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 04:22:49,417 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 04:22:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 04:22:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 04:22:49,458 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 04:22:49,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 04:22:49 BoogieIcfgContainer [2018-02-04 04:22:49,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 04:22:49,473 INFO L168 Benchmark]: Toolchain (without parser) took 1143.01 ms. Allocated memory was 404.8 MB in the beginning and 608.7 MB in the end (delta: 203.9 MB). Free memory was 362.8 MB in the beginning and 561.1 MB in the end (delta: -198.3 MB). Peak memory consumption was 5.6 MB. Max. memory is 5.3 GB. [2018-02-04 04:22:49,474 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 404.8 MB. Free memory is still 368.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 04:22:49,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.54 ms. Allocated memory is still 404.8 MB. Free memory was 361.4 MB in the beginning and 352.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-04 04:22:49,475 INFO L168 Benchmark]: Boogie Preprocessor took 26.11 ms. Allocated memory is still 404.8 MB. Free memory was 352.2 MB in the beginning and 349.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-04 04:22:49,475 INFO L168 Benchmark]: RCFGBuilder took 183.58 ms. Allocated memory is still 404.8 MB. Free memory was 349.5 MB in the beginning and 332.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 5.3 GB. [2018-02-04 04:22:49,476 INFO L168 Benchmark]: TraceAbstraction took 768.81 ms. Allocated memory was 404.8 MB in the beginning and 608.7 MB in the end (delta: 203.9 MB). Free memory was 330.9 MB in the beginning and 561.1 MB in the end (delta: -230.2 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 04:22:49,478 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 404.8 MB. Free memory is still 368.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 161.54 ms. Allocated memory is still 404.8 MB. Free memory was 361.4 MB in the beginning and 352.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.11 ms. Allocated memory is still 404.8 MB. Free memory was 352.2 MB in the beginning and 349.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 183.58 ms. Allocated memory is still 404.8 MB. Free memory was 349.5 MB in the beginning and 332.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 5.3 GB. * TraceAbstraction took 768.81 ms. Allocated memory was 404.8 MB in the beginning and 608.7 MB in the end (delta: 203.9 MB). Free memory was 330.9 MB in the beginning and 561.1 MB in the end (delta: -230.2 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j; [L542] int val; [L543] int length = __VERIFIER_nondet_int(); [L544] COND TRUE length < 1 [L544] length = 1 VAL [length=1] [L545] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={5:0}, length=1] [L545] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={5:0}, arr={5:0}, length=1] [L546] COND FALSE !(!arr) [L547] i=0 VAL [__builtin_alloca (length)={5:0}, arr={5:0}, i=0, length=1] [L547] COND TRUE i