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/selectionsort_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 20:21:10,355 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 20:21:10,356 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 20:21:10,367 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 20:21:10,367 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 20:21:10,368 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 20:21:10,369 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 20:21:10,371 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 20:21:10,372 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 20:21:10,373 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 20:21:10,374 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 20:21:10,374 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 20:21:10,375 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 20:21:10,376 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 20:21:10,377 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 20:21:10,378 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 20:21:10,380 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 20:21:10,381 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 20:21:10,382 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 20:21:10,383 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 20:21:10,385 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 20:21:10,389 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 20:21:10,390 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 20:21:10,390 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 20:21:10,399 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 20:21:10,399 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 20:21:10,400 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 20:21:10,400 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 20:21:10,400 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 20:21:10,401 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 20:21:10,401 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 20:21:10,402 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 20:21:10,402 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 20:21:10,402 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 20:21:10,402 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 20:21:10,402 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 20:21:10,402 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 20:21:10,402 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 20:21:10,402 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-02-04 20:21:10,403 INFO L133 SettingsManager]: * SMT solver=External_Z3InterpolationMode [2018-02-04 20:21:10,403 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 20:21:10,432 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 20:21:10,440 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 20:21:10,442 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 20:21:10,444 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 20:21:10,444 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 20:21:10,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/selectionsort_unsafe_false-valid-deref.i [2018-02-04 20:21:10,523 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 20:21:10,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 20:21:10,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 20:21:10,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 20:21:10,536 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 20:21:10,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54def803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10, skipping insertion in model container [2018-02-04 20:21:10,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,553 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 20:21:10,570 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 20:21:10,671 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 20:21:10,683 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 20:21:10,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10 WrapperNode [2018-02-04 20:21:10,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 20:21:10,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 20:21:10,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 20:21:10,688 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 20:21:10,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (1/1) ... [2018-02-04 20:21:10,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 20:21:10,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 20:21:10,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 20:21:10,715 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 20:21:10,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (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 20:21:10,753 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 20:21:10,753 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 20:21:10,754 INFO L136 BoogieDeclarations]: Found implementation of procedure SelectionSort [2018-02-04 20:21:10,754 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure SelectionSort [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 20:21:10,754 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 20:21:10,890 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 20:21:10,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 08:21:10 BoogieIcfgContainer [2018-02-04 20:21:10,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 20:21:10,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 20:21:10,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 20:21:10,893 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 20:21:10,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 08:21:10" (1/3) ... [2018-02-04 20:21:10,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af3145d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 08:21:10, skipping insertion in model container [2018-02-04 20:21:10,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 08:21:10" (2/3) ... [2018-02-04 20:21:10,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af3145d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 08:21:10, skipping insertion in model container [2018-02-04 20:21:10,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 08:21:10" (3/3) ... [2018-02-04 20:21:10,895 INFO L107 eAbstractionObserver]: Analyzing ICFG selectionsort_unsafe_false-valid-deref.i [2018-02-04 20:21:10,900 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-04 20:21:10,904 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2018-02-04 20:21:10,947 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 20:21:10,948 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 20:21:10,948 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-02-04 20:21:10,948 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-04 20:21:10,948 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 20:21:10,948 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 20:21:10,948 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 20:21:10,948 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 20:21:10,949 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 20:21:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-02-04 20:21:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-04 20:21:10,969 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 20:21:10,970 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 20:21:10,970 INFO L371 AbstractCegarLoop]: === Iteration 1 === [SelectionSortErr2RequiresViolation, SelectionSortErr4RequiresViolation, SelectionSortErr8RequiresViolation, SelectionSortErr9RequiresViolation, SelectionSortErr3RequiresViolation, SelectionSortErr1RequiresViolation, SelectionSortErr5RequiresViolation, SelectionSortErr11RequiresViolation, SelectionSortErr7RequiresViolation, SelectionSortErr10RequiresViolation, SelectionSortErr0RequiresViolation, SelectionSortErr6RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 20:21:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash 474885727, 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 20:21:10,984 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 20:21:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 20:21:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 20:21:11,044 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 20:21:11,075 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 20:21:11,076 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 20:21:11,076 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 20:21:11,076 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 20:21:11,077 INFO L182 omatonBuilderFactory]: Interpolants [51#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)), 46#true, 47#false] [2018-02-04 20:21:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 20:21:11,078 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-02-04 20:21:11,085 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-02-04 20:21:11,085 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-04 20:21:11,087 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2018-02-04 20:21:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 20:21:11,145 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-02-04 20:21:11,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-02-04 20:21:11,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-02-04 20:21:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 20:21:11,155 INFO L225 Difference]: With dead ends: 42 [2018-02-04 20:21:11,155 INFO L226 Difference]: Without dead ends: 35 [2018-02-04 20:21:11,157 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-04 20:21:11,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-02-04 20:21:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-02-04 20:21:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-02-04 20:21:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-02-04 20:21:11,179 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 12 [2018-02-04 20:21:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 20:21:11,180 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-02-04 20:21:11,180 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-02-04 20:21:11,180 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-02-04 20:21:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 20:21:11,180 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 20:21:11,181 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 20:21:11,181 INFO L371 AbstractCegarLoop]: === Iteration 2 === [SelectionSortErr2RequiresViolation, SelectionSortErr4RequiresViolation, SelectionSortErr8RequiresViolation, SelectionSortErr9RequiresViolation, SelectionSortErr3RequiresViolation, SelectionSortErr1RequiresViolation, SelectionSortErr5RequiresViolation, SelectionSortErr11RequiresViolation, SelectionSortErr7RequiresViolation, SelectionSortErr10RequiresViolation, SelectionSortErr0RequiresViolation, SelectionSortErr6RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 20:21:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1836535847, 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 20:21:11,189 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 20:21:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 20:21:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 20:21:11,260 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 20:21:11,261 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 20:21:11,262 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-04 20:21:11,262 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 20:21:11,262 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 20:21:11,262 INFO L182 omatonBuilderFactory]: Interpolants [129#true, 130#false, 134#(= 0 SelectionSort_~i~0), 135#(and (< SelectionSort_~j~0 SelectionSort_~array_size) (<= SelectionSort_~j~0 1)), 136#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))] [2018-02-04 20:21:11,263 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 20:21:11,264 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 20:21:11,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 20:21:11,264 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-04 20:21:11,265 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2018-02-04 20:21:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 20:21:11,438 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-02-04 20:21:11,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 20:21:11,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-02-04 20:21:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 20:21:11,440 INFO L225 Difference]: With dead ends: 72 [2018-02-04 20:21:11,440 INFO L226 Difference]: Without dead ends: 72 [2018-02-04 20:21:11,441 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-02-04 20:21:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-02-04 20:21:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 39. [2018-02-04 20:21:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-04 20:21:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-02-04 20:21:11,446 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 13 [2018-02-04 20:21:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 20:21:11,446 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-02-04 20:21:11,447 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 20:21:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-02-04 20:21:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 20:21:11,447 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 20:21:11,447 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 20:21:11,447 INFO L371 AbstractCegarLoop]: === Iteration 3 === [SelectionSortErr2RequiresViolation, SelectionSortErr4RequiresViolation, SelectionSortErr8RequiresViolation, SelectionSortErr9RequiresViolation, SelectionSortErr3RequiresViolation, SelectionSortErr1RequiresViolation, SelectionSortErr5RequiresViolation, SelectionSortErr11RequiresViolation, SelectionSortErr7RequiresViolation, SelectionSortErr10RequiresViolation, SelectionSortErr0RequiresViolation, SelectionSortErr6RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 20:21:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1836535893, 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 20:21:11,451 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 20:21:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 20:21:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 20:21:11,495 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 20:21:11,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 08:21:11 BoogieIcfgContainer [2018-02-04 20:21:11,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 20:21:11,509 INFO L168 Benchmark]: Toolchain (without parser) took 985.83 ms. Allocated memory is still 395.3 MB. Free memory was 353.4 MB in the beginning and 260.8 MB in the end (delta: 92.6 MB). Peak memory consumption was 92.6 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:11,510 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 395.3 MB. Free memory is still 358.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 20:21:11,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.49 ms. Allocated memory is still 395.3 MB. Free memory was 353.4 MB in the beginning and 345.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:11,511 INFO L168 Benchmark]: Boogie Preprocessor took 26.87 ms. Allocated memory is still 395.3 MB. Free memory was 345.3 MB in the beginning and 344.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:11,511 INFO L168 Benchmark]: RCFGBuilder took 175.50 ms. Allocated memory is still 395.3 MB. Free memory was 344.0 MB in the beginning and 326.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:11,512 INFO L168 Benchmark]: TraceAbstraction took 617.98 ms. Allocated memory is still 395.3 MB. Free memory was 326.0 MB in the beginning and 260.8 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 5.3 GB. [2018-02-04 20:21:11,514 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 395.3 MB. Free memory is still 358.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 162.49 ms. Allocated memory is still 395.3 MB. Free memory was 353.4 MB in the beginning and 345.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.87 ms. Allocated memory is still 395.3 MB. Free memory was 345.3 MB in the beginning and 344.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 175.50 ms. Allocated memory is still 395.3 MB. Free memory was 344.0 MB in the beginning and 326.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 617.98 ms. Allocated memory is still 395.3 MB. Free memory was 326.0 MB in the beginning and 260.8 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L20] int *a; [L21] int array_size = __VERIFIER_nondet_int(); [L22] CALL SelectionSort(a, array_size) VAL [\old(array_size)=2, a={7:9}] [L4] int i; [L5] i = 0 VAL [\old(array_size)=2, a={7:9}, a={7:9}, array_size=2, i=0] [L5] COND TRUE i < array_size - 1 [L7] int j, min, temp; [L8] min = i [L9] j = i+1 VAL [\old(array_size)=2, a={7:9}, a={7:9}, array_size=2, i=0, j=1, min=0] [L9] COND TRUE j < array_size VAL [\old(array_size)=2, a={7:9}, a={7:9}, array_size=2, i=0, j=1, min=0] [L11] FCALL a[j] VAL [\old(array_size)=2, a={7:9}, a={7:9}, array_size=2, i=0, j=1, min=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 13 error locations. UNSAFE Result, 0.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 46 SDtfs, 150 SDslu, 15 SDs, 0 SdLazy, 101 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 33 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 664 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/selectionsort_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-04_20-21-11-519.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/selectionsort_unsafe_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-04_20-21-11-519.csv Received shutdown request...