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_z3.epf -i ../../../trunk/examples/svcomp/array-memsafety/mult_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 10:51:29,288 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 10:51:29,289 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 10:51:29,301 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 10:51:29,301 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 10:51:29,301 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 10:51:29,302 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 10:51:29,303 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 10:51:29,305 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 10:51:29,305 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 10:51:29,306 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 10:51:29,306 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 10:51:29,307 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 10:51:29,308 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 10:51:29,309 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 10:51:29,311 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 10:51:29,312 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 10:51:29,314 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 10:51:29,315 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 10:51:29,316 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 10:51:29,318 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 10:51:29,322 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 10:51:29,322 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 10:51:29,323 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf [2018-02-02 10:51:29,333 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 10:51:29,333 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 10:51:29,334 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 10:51:29,334 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 10:51:29,335 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 10:51:29,335 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 10:51:29,335 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 10:51:29,335 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 10:51:29,335 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 10:51:29,335 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 10:51:29,336 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 10:51:29,336 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 10:51:29,336 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 10:51:29,336 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 10:51:29,336 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 10:51:29,336 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 10:51:29,337 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 10:51:29,337 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 10:51:29,337 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 10:51:29,337 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 10:51:29,337 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 10:51:29,337 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 10:51:29,337 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-02-02 10:51:29,338 INFO L133 SettingsManager]: * SMT solver=External_Z3InterpolationMode [2018-02-02 10:51:29,338 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-02 10:51:29,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 10:51:29,376 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 10:51:29,379 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 10:51:29,380 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 10:51:29,380 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 10:51:29,381 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/mult_array_unsafe_false-valid-deref.i [2018-02-02 10:51:29,500 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 10:51:29,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 10:51:29,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 10:51:29,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 10:51:29,507 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 10:51:29,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7deabca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29, skipping insertion in model container [2018-02-02 10:51:29,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,520 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 10:51:29,547 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 10:51:29,638 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 10:51:29,650 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 10:51:29,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29 WrapperNode [2018-02-02 10:51:29,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 10:51:29,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 10:51:29,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 10:51:29,658 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 10:51:29,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (1/1) ... [2018-02-02 10:51:29,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 10:51:29,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 10:51:29,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 10:51:29,683 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 10:51:29,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (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 10:51:29,723 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 10:51:29,723 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 10:51:29,723 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 10:51:29,723 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 10:51:29,723 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 10:51:29,723 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 10:51:29,724 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 10:51:29,724 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 10:51:29,724 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 10:51:29,724 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 10:51:29,724 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 10:51:29,724 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 10:51:29,862 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 10:51:29,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 10:51:29 BoogieIcfgContainer [2018-02-02 10:51:29,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 10:51:29,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 10:51:29,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 10:51:29,865 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 10:51:29,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 10:51:29" (1/3) ... [2018-02-02 10:51:29,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767df2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 10:51:29, skipping insertion in model container [2018-02-02 10:51:29,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:51:29" (2/3) ... [2018-02-02 10:51:29,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767df2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 10:51:29, skipping insertion in model container [2018-02-02 10:51:29,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 10:51:29" (3/3) ... [2018-02-02 10:51:29,867 INFO L107 eAbstractionObserver]: Analyzing ICFG mult_array_unsafe_false-valid-deref.i [2018-02-02 10:51:29,873 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-02 10:51:29,878 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-02-02 10:51:29,908 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 10:51:29,908 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 10:51:29,908 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-02-02 10:51:29,908 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-02 10:51:29,908 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 10:51:29,909 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 10:51:29,909 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 10:51:29,909 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 10:51:29,909 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 10:51:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2018-02-02 10:51:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 10:51:29,926 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:51:29,927 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:51:29,927 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 10:51:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash 83465695, 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 [2018-02-02 10:51:29,944 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:51:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:51:29,979 WARN L195 Executor]: ExternalInterpolator (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in) stderr output: WARNING: array quantifier [2018-02-02 10:51:29,991 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:51:29,991 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:51:29,992 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:51:29,992 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:51:30,030 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 [2018-02-02 10:51:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:51:30,074 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 10:51:30,094 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 10:51:30,095 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-02 10:51:30,095 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 10:51:30,096 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 10:51:30,096 INFO L182 omatonBuilderFactory]: Interpolants [49#true, 50#false, 54#(exists ((%0 (Array Int Int))) (! (forall ((%1 Int)) (! (= (store |#valid| %1 1) (store %0 %1 1)) :qid itp)) :qid itp)), 55#(= 1 (select |#valid| |main_#t~malloc2.base|)), 56#(= 1 (select |#valid| main_~arr~0.base)), 57#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))] [2018-02-02 10:51:30,096 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 10:51:30,097 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-02 10:51:30,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-02 10:51:30,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2018-02-02 10:51:30,106 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 6 states. [2018-02-02 10:51:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 10:51:30,344 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2018-02-02 10:51:30,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-02 10:51:30,346 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-02-02 10:51:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 10:51:30,356 INFO L225 Difference]: With dead ends: 83 [2018-02-02 10:51:30,357 INFO L226 Difference]: Without dead ends: 80 [2018-02-02 10:51:30,358 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=28, Unknown=2, NotChecked=10, Total=56 [2018-02-02 10:51:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-02-02 10:51:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2018-02-02 10:51:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-02-02 10:51:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2018-02-02 10:51:30,389 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 17 [2018-02-02 10:51:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 10:51:30,390 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2018-02-02 10:51:30,390 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-02 10:51:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2018-02-02 10:51:30,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 10:51:30,391 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:51:30,391 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:51:30,391 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 10:51:30,391 INFO L82 PathProgramCache]: Analyzing trace with hash 83465696, 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 [2018-02-02 10:51:30,395 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:51:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 10:51:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-02-02 10:51:30,521 INFO L410 BasicCegarLoop]: Counterexample might be feasible [2018-02-02 10:51:30,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 10:51:30 BoogieIcfgContainer [2018-02-02 10:51:30,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 10:51:30,536 INFO L168 Benchmark]: Toolchain (without parser) took 1035.56 ms. Allocated memory was 403.7 MB in the beginning and 607.6 MB in the end (delta: 203.9 MB). Free memory was 360.4 MB in the beginning and 572.2 MB in the end (delta: -211.8 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 10:51:30,537 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 403.7 MB. Free memory is still 365.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 10:51:30,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.25 ms. Allocated memory is still 403.7 MB. Free memory was 360.4 MB in the beginning and 349.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. [2018-02-02 10:51:30,538 INFO L168 Benchmark]: Boogie Preprocessor took 25.07 ms. Allocated memory is still 403.7 MB. Free memory was 349.8 MB in the beginning and 347.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 10:51:30,538 INFO L168 Benchmark]: RCFGBuilder took 180.05 ms. Allocated memory is still 403.7 MB. Free memory was 347.2 MB in the beginning and 330.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 5.3 GB. [2018-02-02 10:51:30,539 INFO L168 Benchmark]: TraceAbstraction took 672.54 ms. Allocated memory was 403.7 MB in the beginning and 607.6 MB in the end (delta: 203.9 MB). Free memory was 330.0 MB in the beginning and 572.2 MB in the end (delta: -242.2 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 10:51:30,541 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 403.7 MB. Free memory is still 365.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 155.25 ms. Allocated memory is still 403.7 MB. Free memory was 360.4 MB in the beginning and 349.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 25.07 ms. Allocated memory is still 403.7 MB. Free memory was 349.8 MB in the beginning and 347.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 180.05 ms. Allocated memory is still 403.7 MB. Free memory was 347.2 MB in the beginning and 330.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 5.3 GB. * TraceAbstraction took 672.54 ms. Allocated memory was 403.7 MB in the beginning and 607.6 MB in the end (delta: 203.9 MB). Free memory was 330.0 MB in the beginning and 572.2 MB in the end (delta: -242.2 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L541] int i, j; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L543] length = 1 VAL [length=1] [L544] int fac = __VERIFIER_nondet_int(); [L545] COND FALSE !(fac < 1 || fac >= 2147483647 / (sizeof(int) * length)) VAL [fac=7720, length=1] [L546] EXPR, FCALL __builtin_alloca (length) VAL [__builtin_alloca (length)={6:0}, fac=7720, length=1] [L546] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={6:0}, arr={6:0}, fac=7720, length=1] [L547] EXPR, FCALL __builtin_alloca (fac*length) VAL [__builtin_alloca (fac*length)={5:0}, __builtin_alloca (length)={6:0}, arr={6:0}, fac=7720, length=1] [L547] int *arr2 = __builtin_alloca (fac*length); VAL [__builtin_alloca (fac*length)={5:0}, __builtin_alloca (length)={6:0}, arr={6:0}, arr2={5:0}, fac=7720, length=1] [L548] COND FALSE !(!arr || !arr2) [L549] i=0 VAL [__builtin_alloca (fac*length)={5:0}, __builtin_alloca (length)={6:0}, arr={6:0}, arr2={5:0}, fac=7720, i=0, length=1] [L549] COND TRUE i