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/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 08:40:27,773 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 08:40:27,775 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 08:40:27,784 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 08:40:27,784 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 08:40:27,785 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 08:40:27,786 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 08:40:27,787 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 08:40:27,789 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 08:40:27,789 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 08:40:27,790 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 08:40:27,790 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 08:40:27,791 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 08:40:27,795 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 08:40:27,796 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 08:40:27,798 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 08:40:27,799 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 08:40:27,801 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 08:40:27,802 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 08:40:27,803 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 08:40:27,804 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-02 08:40:27,805 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-02 08:40:27,805 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-02 08:40:27,806 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-02 08:40:27,806 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-02 08:40:27,807 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-02 08:40:27,808 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-02 08:40:27,808 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-02 08:40:27,808 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-02 08:40:27,809 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 08:40:27,809 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 08:40:27,809 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 08:40:27,819 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 08:40:27,819 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 08:40:27,820 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 08:40:27,820 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 08:40:27,820 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 08:40:27,821 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 08:40:27,821 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 08:40:27,821 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 08:40:27,821 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 08:40:27,821 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 08:40:27,821 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 08:40:27,821 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 08:40:27,822 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 08:40:27,822 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 08:40:27,822 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 08:40:27,822 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 08:40:27,822 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 08:40:27,822 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 08:40:27,822 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 08:40:27,823 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 08:40:27,823 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 08:40:27,823 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 08:40:27,823 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 08:40:27,823 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 08:40:27,823 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 08:40:27,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 08:40:27,859 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 08:40:27,862 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 08:40:27,863 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 08:40:27,863 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 08:40:27,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-02-02 08:40:27,984 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 08:40:27,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 08:40:27,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 08:40:27,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 08:40:27,992 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 08:40:27,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:40:27" (1/1) ... [2018-02-02 08:40:27,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1482aa0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:27, skipping insertion in model container [2018-02-02 08:40:27,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:40:27" (1/1) ... [2018-02-02 08:40:28,006 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:40:28,038 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:40:28,134 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:40:28,148 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:40:28,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28 WrapperNode [2018-02-02 08:40:28,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 08:40:28,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 08:40:28,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 08:40:28,156 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 08:40:28,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (1/1) ... [2018-02-02 08:40:28,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (1/1) ... [2018-02-02 08:40:28,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (1/1) ... [2018-02-02 08:40:28,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (1/1) ... [2018-02-02 08:40:28,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (1/1) ... [2018-02-02 08:40:28,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (1/1) ... [2018-02-02 08:40:28,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (1/1) ... [2018-02-02 08:40:28,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 08:40:28,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 08:40:28,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 08:40:28,182 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 08:40:28,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (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 [2018-02-02 08:40:28,234 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 08:40:28,234 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 08:40:28,235 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 08:40:28,235 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 08:40:28,235 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 08:40:28,235 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 08:40:28,235 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 08:40:28,235 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 08:40:28,235 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 08:40:28,235 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 08:40:28,236 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 08:40:28,236 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 08:40:28,452 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 08:40:28,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:40:28 BoogieIcfgContainer [2018-02-02 08:40:28,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 08:40:28,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 08:40:28,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 08:40:28,455 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 08:40:28,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 08:40:27" (1/3) ... [2018-02-02 08:40:28,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a722b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:40:28, skipping insertion in model container [2018-02-02 08:40:28,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:28" (2/3) ... [2018-02-02 08:40:28,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a722b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:40:28, skipping insertion in model container [2018-02-02 08:40:28,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:40:28" (3/3) ... [2018-02-02 08:40:28,457 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-02-02 08:40:28,462 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 08:40:28,466 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-02-02 08:40:28,491 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 08:40:28,491 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 08:40:28,491 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 08:40:28,492 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 08:40:28,492 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 08:40:28,492 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 08:40:28,492 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 08:40:28,492 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 08:40:28,493 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 08:40:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-02-02 08:40:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-02 08:40:28,513 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:28,514 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:28,514 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]=== [2018-02-02 08:40:28,518 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, now seen corresponding path program 1 times [2018-02-02 08:40:28,519 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:28,520 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:28,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:28,563 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:28,563 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:28,613 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:40:28,645 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:28,645 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-02 08:40:28,646 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-02-02 08:40:28,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-02-02 08:40:28,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-02-02 08:40:28,660 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2018-02-02 08:40:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:28,678 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-02-02 08:40:28,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-02-02 08:40:28,679 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-02-02 08:40:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:28,685 INFO L225 Difference]: With dead ends: 63 [2018-02-02 08:40:28,685 INFO L226 Difference]: Without dead ends: 60 [2018-02-02 08:40:28,686 INFO L554 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 [2018-02-02 08:40:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-02-02 08:40:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-02-02 08:40:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-02-02 08:40:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-02-02 08:40:28,768 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-02-02 08:40:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:28,768 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-02-02 08:40:28,769 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-02-02 08:40:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-02-02 08:40:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 08:40:28,769 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:28,769 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:28,769 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]=== [2018-02-02 08:40:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, now seen corresponding path program 1 times [2018-02-02 08:40:28,770 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:28,770 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:28,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:28,771 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:28,771 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:28,783 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:40:28,841 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:28,841 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:40:28,842 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:40:28,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:40:28,842 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:40:28,843 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2018-02-02 08:40:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:28,966 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2018-02-02 08:40:28,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 08:40:28,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 08:40:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:28,967 INFO L225 Difference]: With dead ends: 56 [2018-02-02 08:40:28,967 INFO L226 Difference]: Without dead ends: 56 [2018-02-02 08:40:28,968 INFO L554 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 [2018-02-02 08:40:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-02 08:40:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-02-02 08:40:28,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-02-02 08:40:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2018-02-02 08:40:28,972 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 13 [2018-02-02 08:40:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:28,972 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2018-02-02 08:40:28,972 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:40:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2018-02-02 08:40:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 08:40:28,973 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:28,973 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:28,973 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]=== [2018-02-02 08:40:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258409, now seen corresponding path program 1 times [2018-02-02 08:40:28,974 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:28,974 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:28,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:28,975 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:28,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:28,989 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:40:29,029 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:29,029 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:40:29,029 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:40:29,029 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:40:29,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:40:29,029 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 4 states. [2018-02-02 08:40:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:29,072 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2018-02-02 08:40:29,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 08:40:29,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 08:40:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:29,073 INFO L225 Difference]: With dead ends: 68 [2018-02-02 08:40:29,073 INFO L226 Difference]: Without dead ends: 68 [2018-02-02 08:40:29,073 INFO L554 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 [2018-02-02 08:40:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-02 08:40:29,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2018-02-02 08:40:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-02-02 08:40:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-02-02 08:40:29,079 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-02-02 08:40:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:29,079 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-02-02 08:40:29,079 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:40:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-02-02 08:40:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 08:40:29,080 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:29,080 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:29,080 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]=== [2018-02-02 08:40:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times [2018-02-02 08:40:29,080 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:29,080 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:29,081 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:29,081 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:29,081 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 08:40:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 08:40:29,121 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-02 08:40:29,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 08:40:29 BoogieIcfgContainer [2018-02-02 08:40:29,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 08:40:29,138 INFO L168 Benchmark]: Toolchain (without parser) took 1152.62 ms. Allocated memory was 398.5 MB in the beginning and 598.2 MB in the end (delta: 199.8 MB). Free memory was 353.8 MB in the beginning and 537.0 MB in the end (delta: -183.2 MB). Peak memory consumption was 16.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:29,139 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 398.5 MB. Free memory is still 359.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 08:40:29,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.96 ms. Allocated memory is still 398.5 MB. Free memory was 352.5 MB in the beginning and 341.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:29,140 INFO L168 Benchmark]: Boogie Preprocessor took 26.14 ms. Allocated memory is still 398.5 MB. Free memory was 341.9 MB in the beginning and 340.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:29,140 INFO L168 Benchmark]: RCFGBuilder took 270.67 ms. Allocated memory is still 398.5 MB. Free memory was 340.6 MB in the beginning and 318.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:29,140 INFO L168 Benchmark]: TraceAbstraction took 683.76 ms. Allocated memory was 398.5 MB in the beginning and 598.2 MB in the end (delta: 199.8 MB). Free memory was 318.1 MB in the beginning and 537.0 MB in the end (delta: -218.9 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 08:40:29,142 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 398.5 MB. Free memory is still 359.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 168.96 ms. Allocated memory is still 398.5 MB. Free memory was 352.5 MB in the beginning and 341.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.14 ms. Allocated memory is still 398.5 MB. Free memory was 341.9 MB in the beginning and 340.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 270.67 ms. Allocated memory is still 398.5 MB. Free memory was 340.6 MB in the beginning and 318.1 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 683.76 ms. Allocated memory was 398.5 MB in the beginning and 598.2 MB in the end (delta: 199.8 MB). Free memory was 318.1 MB in the beginning and 537.0 MB in the end (delta: -218.9 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j, tmp; [L542] int length = __VERIFIER_nondet_int(); [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) VAL [__builtin_alloca (length)={3:0}, length=1] [L545] int *arr = __builtin_alloca (length); [L546] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L546] COND TRUE i