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/reverse_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-ccafca9-m [2018-02-04 04:23:03,363 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 04:23:03,365 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 04:23:03,377 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 04:23:03,377 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 04:23:03,378 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 04:23:03,379 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 04:23:03,381 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 04:23:03,383 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 04:23:03,383 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 04:23:03,384 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 04:23:03,384 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 04:23:03,385 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 04:23:03,386 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 04:23:03,387 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 04:23:03,389 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 04:23:03,391 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 04:23:03,393 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 04:23:03,394 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 04:23:03,395 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 04:23:03,397 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 04:23:03,402 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 04:23:03,402 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 04:23:03,403 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 04:23:03,414 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 04:23:03,414 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 04:23:03,416 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 04:23:03,416 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 04:23:03,416 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 04:23:03,416 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 04:23:03,416 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 04:23:03,417 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 04:23:03,417 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 04:23:03,417 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 04:23:03,417 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 04:23:03,418 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 04:23:03,418 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 04:23:03,418 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-04 04:23:03,418 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 04:23:03,418 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 04:23:03,419 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 04:23:03,419 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 04:23:03,419 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 04:23:03,419 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 04:23:03,419 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 04:23:03,420 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 04:23:03,420 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-02-04 04:23:03,420 INFO L133 SettingsManager]: * SMT solver=External_Z3InterpolationMode [2018-02-04 04:23:03,420 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 04:23:03,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 04:23:03,461 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 04:23:03,464 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 04:23:03,466 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 04:23:03,466 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 04:23:03,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/reverse_array_unsafe_false-valid-deref.i [2018-02-04 04:23:03,628 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 04:23:03,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 04:23:03,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 04:23:03,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 04:23:03,636 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 04:23:03,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f415149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03, skipping insertion in model container [2018-02-04 04:23:03,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,655 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 04:23:03,683 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 04:23:03,791 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 04:23:03,803 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 04:23:03,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03 WrapperNode [2018-02-04 04:23:03,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 04:23:03,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 04:23:03,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 04:23:03,809 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 04:23:03,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (1/1) ... [2018-02-04 04:23:03,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 04:23:03,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 04:23:03,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 04:23:03,840 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 04:23:03,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (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 04:23:03,880 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 04:23:03,880 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 04:23:03,880 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 04:23:03,881 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 04:23:04,116 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 04:23:04,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 04:23:04 BoogieIcfgContainer [2018-02-04 04:23:04,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 04:23:04,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 04:23:04,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 04:23:04,119 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 04:23:04,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 04:23:03" (1/3) ... [2018-02-04 04:23:04,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bd3897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 04:23:04, skipping insertion in model container [2018-02-04 04:23:04,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 04:23:03" (2/3) ... [2018-02-04 04:23:04,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bd3897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 04:23:04, skipping insertion in model container [2018-02-04 04:23:04,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 04:23:04" (3/3) ... [2018-02-04 04:23:04,121 INFO L107 eAbstractionObserver]: Analyzing ICFG reverse_array_unsafe_false-valid-deref.i [2018-02-04 04:23:04,127 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-04 04:23:04,132 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-02-04 04:23:04,153 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 04:23:04,153 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 04:23:04,153 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-02-04 04:23:04,154 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-04 04:23:04,154 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 04:23:04,154 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 04:23:04,154 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 04:23:04,154 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 04:23:04,155 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 04:23:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2018-02-04 04:23:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-04 04:23:04,173 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:23:04,174 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:23:04,174 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]=== [2018-02-04 04:23:04,177 INFO L82 PathProgramCache]: Analyzing trace with hash -506470517, 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 04:23:04,185 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 04:23:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:23:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:23:04,236 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 04:23:04,257 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:23:04,257 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 04:23:04,258 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 04:23:04,258 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 04:23:04,258 INFO L182 omatonBuilderFactory]: Interpolants [66#true, 67#false, 71#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))] [2018-02-04 04:23:04,259 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 04:23:04,259 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-02-04 04:23:04,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-02-04 04:23:04,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-04 04:23:04,269 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2018-02-04 04:23:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:23:04,417 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-02-04 04:23:04,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-02-04 04:23:04,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-02-04 04:23:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:23:04,427 INFO L225 Difference]: With dead ends: 63 [2018-02-04 04:23:04,427 INFO L226 Difference]: Without dead ends: 60 [2018-02-04 04:23:04,429 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 04:23:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-02-04 04:23:04,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-02-04 04:23:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-02-04 04:23:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-02-04 04:23:04,461 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 12 [2018-02-04 04:23:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:23:04,462 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-02-04 04:23:04,462 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-02-04 04:23:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-02-04 04:23:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 04:23:04,463 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:23:04,463 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:23:04,463 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]=== [2018-02-04 04:23:04,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258408, 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 04:23:04,468 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 04:23:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:23:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:23:04,497 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 04:23:04,525 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:23:04,526 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-04 04:23:04,526 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 04:23:04,526 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 04:23:04,527 INFO L182 omatonBuilderFactory]: Interpolants [195#true, 196#false, 200#(= main_~length~0 1), 201#(< main_~i~0 main_~length~0), 202#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))] [2018-02-04 04:23:04,527 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 04:23:04,528 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 04:23:04,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 04:23:04,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-04 04:23:04,529 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 5 states. [2018-02-04 04:23:04,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:23:04,735 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2018-02-04 04:23:04,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-04 04:23:04,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-02-04 04:23:04,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:23:04,737 INFO L225 Difference]: With dead ends: 115 [2018-02-04 04:23:04,737 INFO L226 Difference]: Without dead ends: 115 [2018-02-04 04:23:04,738 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 04:23:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-02-04 04:23:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 65. [2018-02-04 04:23:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-02-04 04:23:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-02-04 04:23:04,744 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 13 [2018-02-04 04:23:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:23:04,745 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-02-04 04:23:04,745 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 04:23:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-02-04 04:23:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 04:23:04,746 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:23:04,746 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:23:04,746 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]=== [2018-02-04 04:23:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258449, 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 04:23:04,760 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 04:23:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:23:04,769 WARN L195 Executor]: ExternalInterpolator (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in) stderr output: WARNING: array quantifier [2018-02-04 04:23:04,777 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:23:04,777 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:23:04,778 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:23:04,778 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-04 04:23:04,879 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 04:23:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 04:23:04,911 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 04:23:04,937 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 04:23:04,937 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-04 04:23:04,938 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-04 04:23:04,938 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 04:23:04,938 INFO L182 omatonBuilderFactory]: Interpolants [387#true, 388#false, 392#(exists ((%0 (Array Int Int))) (! (forall ((%1 Int)) (! (= (store |#valid| %1 1) (store %0 %1 1)) :qid itp)) :qid itp)), 393#(= 1 (select |#valid| |main_#t~malloc2.base|)), 394#(= 1 (select |#valid| main_~arr~0.base)), 395#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))] [2018-02-04 04:23:04,938 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 04:23:04,938 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-04 04:23:04,939 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-04 04:23:04,939 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2018-02-04 04:23:04,939 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 6 states. [2018-02-04 04:23:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 04:23:05,157 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2018-02-04 04:23:05,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-04 04:23:05,158 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-02-04 04:23:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 04:23:05,159 INFO L225 Difference]: With dead ends: 112 [2018-02-04 04:23:05,159 INFO L226 Difference]: Without dead ends: 112 [2018-02-04 04:23:05,159 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 04:23:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-02-04 04:23:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 67. [2018-02-04 04:23:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-02-04 04:23:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2018-02-04 04:23:05,164 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 13 [2018-02-04 04:23:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 04:23:05,165 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2018-02-04 04:23:05,165 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-04 04:23:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2018-02-04 04:23:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-04 04:23:05,165 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 04:23:05,166 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 04:23:05,166 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]=== [2018-02-04 04:23:05,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1479258450, now seen corresponding path program 1 times No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-04 04:23:05,169 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-04 04:23:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 04:23:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-04 04:23:05,226 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-04 04:23:05,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 04:23:05 BoogieIcfgContainer [2018-02-04 04:23:05,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 04:23:05,244 INFO L168 Benchmark]: Toolchain (without parser) took 1615.65 ms. Allocated memory was 399.5 MB in the beginning and 612.9 MB in the end (delta: 213.4 MB). Free memory was 357.5 MB in the beginning and 545.5 MB in the end (delta: -188.0 MB). Peak memory consumption was 25.4 MB. Max. memory is 5.3 GB. [2018-02-04 04:23:05,245 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 399.5 MB. Free memory is still 362.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 04:23:05,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.58 ms. Allocated memory is still 399.5 MB. Free memory was 356.2 MB in the beginning and 345.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-04 04:23:05,246 INFO L168 Benchmark]: Boogie Preprocessor took 30.11 ms. Allocated memory is still 399.5 MB. Free memory was 345.6 MB in the beginning and 344.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-04 04:23:05,247 INFO L168 Benchmark]: RCFGBuilder took 276.89 ms. Allocated memory is still 399.5 MB. Free memory was 344.3 MB in the beginning and 321.8 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. [2018-02-04 04:23:05,247 INFO L168 Benchmark]: TraceAbstraction took 1126.39 ms. Allocated memory was 399.5 MB in the beginning and 612.9 MB in the end (delta: 213.4 MB). Free memory was 321.8 MB in the beginning and 545.5 MB in the end (delta: -223.8 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 04:23:05,249 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 399.5 MB. Free memory is still 362.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 178.58 ms. Allocated memory is still 399.5 MB. Free memory was 356.2 MB in the beginning and 345.6 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.11 ms. Allocated memory is still 399.5 MB. Free memory was 345.6 MB in the beginning and 344.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 276.89 ms. Allocated memory is still 399.5 MB. Free memory was 344.3 MB in the beginning and 321.8 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 1126.39 ms. Allocated memory was 399.5 MB in the beginning and 612.9 MB in the end (delta: 213.4 MB). Free memory was 321.8 MB in the beginning and 545.5 MB in the end (delta: -223.8 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)={5:0}, length=1] [L545] int *arr = __builtin_alloca (length); [L546] i=0 VAL [__builtin_alloca (length)={5:0}, arr={5:0}, i=0, length=1] [L546] COND TRUE i