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/rec_strlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 10:52:34,466 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 10:52:34,468 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 10:52:34,481 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 10:52:34,481 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 10:52:34,482 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 10:52:34,483 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 10:52:34,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 10:52:34,488 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 10:52:34,489 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 10:52:34,490 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 10:52:34,490 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 10:52:34,491 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 10:52:34,492 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 10:52:34,493 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 10:52:34,495 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 10:52:34,497 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 10:52:34,498 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 10:52:34,500 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 10:52:34,501 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 10:52:34,503 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 10:52:34,508 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 10:52:34,518 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 10:52:34,519 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 10:52:34,520 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 10:52:34,520 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 10:52:34,520 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 10:52:34,520 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 10:52:34,520 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 10:52:34,521 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 10:52:34,521 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 10:52:34,521 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 10:52:34,521 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 10:52:34,521 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 10:52:34,521 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 10:52:34,521 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 10:52:34,522 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 10:52:34,522 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 10:52:34,522 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 10:52:34,522 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 10:52:34,522 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 10:52:34,522 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 10:52:34,522 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 10:52:34,523 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 10:52:34,523 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2018-02-02 10:52:34,523 INFO L133 SettingsManager]: * SMT solver=External_Z3InterpolationMode [2018-02-02 10:52:34,523 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-02-02 10:52:34,560 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 10:52:34,571 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 10:52:34,574 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 10:52:34,575 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 10:52:34,575 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 10:52:34,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 10:52:34,702 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 10:52:34,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 10:52:34,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 10:52:34,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 10:52:34,709 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 10:52:34,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34296066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34, skipping insertion in model container [2018-02-02 10:52:34,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,726 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 10:52:34,757 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 10:52:34,848 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 10:52:34,859 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 10:52:34,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34 WrapperNode [2018-02-02 10:52:34,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 10:52:34,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 10:52:34,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 10:52:34,865 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 10:52:34,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (1/1) ... [2018-02-02 10:52:34,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 10:52:34,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 10:52:34,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 10:52:34,892 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 10:52:34,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (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 10:52:34,931 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 10:52:34,931 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 10:52:34,931 INFO L136 BoogieDeclarations]: Found implementation of procedure strlen_rec [2018-02-02 10:52:34,931 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 10:52:34,931 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure strlen_rec [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 10:52:34,932 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 10:52:34,933 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 10:52:35,043 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 10:52:35,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 10:52:35 BoogieIcfgContainer [2018-02-02 10:52:35,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 10:52:35,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 10:52:35,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 10:52:35,046 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 10:52:35,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 10:52:34" (1/3) ... [2018-02-02 10:52:35,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1a0168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 10:52:35, skipping insertion in model container [2018-02-02 10:52:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 10:52:34" (2/3) ... [2018-02-02 10:52:35,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1a0168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 10:52:35, skipping insertion in model container [2018-02-02 10:52:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 10:52:35" (3/3) ... [2018-02-02 10:52:35,049 INFO L107 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 10:52:35,055 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2018-02-02 10:52:35,060 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-02-02 10:52:35,096 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 10:52:35,096 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 10:52:35,096 INFO L324 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2018-02-02 10:52:35,096 INFO L325 AbstractCegarLoop]: Backedges is CANONICAL [2018-02-02 10:52:35,096 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 10:52:35,096 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 10:52:35,096 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 10:52:35,096 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 10:52:35,097 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 10:52:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-02-02 10:52:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 10:52:35,110 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:52:35,111 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:52:35,111 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 10:52:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash -407257815, 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 10:52:35,122 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:52:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:52:35,147 WARN L195 Executor]: ExternalInterpolator (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in) stderr output: WARNING: array quantifier WARNING: array quantifier [2018-02-02 10:52:35,155 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,156 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,157 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,157 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,188 WARN L1033 $PredicateComparison]: unable to prove that (exists ((%0 (Array Int Int))) (! (forall ((%1 Int)) (! (= (store %0 %1 1) (store |c_#length| %1 1)) :qid itp)) :qid itp)) is different from true [2018-02-02 10:52:35,189 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,189 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,190 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,190 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:52:35,264 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 10:52:35,283 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 10:52:35,283 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-02-02 10:52:35,284 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 10:52:35,284 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 10:52:35,285 INFO L182 omatonBuilderFactory]: Interpolants [33#true, 34#false, 38#(exists ((%0 (Array Int Int))) (! (forall ((%1 Int)) (! (= (store %0 %1 1) (store |#length| %1 1)) :qid itp)) :qid itp)), 39#(exists ((%0 (Array Int Int))) (! (and (forall ((%1 Int)) (! (= (store %0 %1 1) (store |#length| %1 1)) :qid itp)) (= main_~length1~0 1)) :qid itp)), 40#(and (= 1 (select |#length| |main_#t~malloc3.base|)) (= 0 |main_#t~malloc3.offset|) (= main_~length1~0 1)), 41#(and (<= (+ main_~nondetString1~0.offset main_~length1~0) (select |#length| main_~nondetString1~0.base)) (<= 1 (+ main_~nondetString1~0.offset main_~length1~0))), 42#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))] [2018-02-02 10:52:35,285 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 10:52:35,286 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-02 10:52:35,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-02 10:52:35,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=21, Unknown=2, NotChecked=8, Total=42 [2018-02-02 10:52:35,296 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 7 states. [2018-02-02 10:52:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 10:52:35,545 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-02-02 10:52:35,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 10:52:35,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-02-02 10:52:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 10:52:35,553 INFO L225 Difference]: With dead ends: 38 [2018-02-02 10:52:35,553 INFO L226 Difference]: Without dead ends: 35 [2018-02-02 10:52:35,554 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=61, Unknown=7, NotChecked=16, Total=110 [2018-02-02 10:52:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-02-02 10:52:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-02-02 10:52:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-02-02 10:52:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2018-02-02 10:52:35,584 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 10 [2018-02-02 10:52:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 10:52:35,584 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2018-02-02 10:52:35,584 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-02 10:52:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2018-02-02 10:52:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 10:52:35,585 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:52:35,585 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:52:35,585 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 10:52:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash -407257816, 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 10:52:35,588 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:52:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:52:35,599 WARN L195 Executor]: ExternalInterpolator (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in) stderr output: WARNING: array quantifier [2018-02-02 10:52:35,600 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,600 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,601 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,601 WARN L251 NnfTransformerHelper]: thrown away annotations [(:qid itp)] [2018-02-02 10:52:35,614 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 10:52:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:52:35,638 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 10:52:35,656 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 10:52:35,656 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-02 10:52:35,656 INFO L142 lantAutomatonBuilder]: Constructing canonical interpolant automaton, with selfloop in false state [2018-02-02 10:52:35,656 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 10:52:35,657 INFO L182 omatonBuilderFactory]: Interpolants [119#true, 120#false, 124#(exists ((%0 (Array Int Int))) (! (forall ((%1 Int)) (! (= (store |#valid| %1 1) (store %0 %1 1)) :qid itp)) :qid itp)), 125#(= 1 (select |#valid| |main_#t~malloc3.base|)), 126#(= 1 (select |#valid| main_~nondetString1~0.base)), 127#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))] [2018-02-02 10:52:35,657 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 10:52:35,714 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-02 10:52:35,715 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-02 10:52:35,715 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2018-02-02 10:52:35,715 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2018-02-02 10:52:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 10:52:35,856 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-02-02 10:52:35,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-02 10:52:35,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-02-02 10:52:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 10:52:35,858 INFO L225 Difference]: With dead ends: 33 [2018-02-02 10:52:35,858 INFO L226 Difference]: Without dead ends: 33 [2018-02-02 10:52:35,859 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 [2018-02-02 10:52:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-02-02 10:52:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-02-02 10:52:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-02-02 10:52:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-02-02 10:52:35,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 10 [2018-02-02 10:52:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 10:52:35,864 INFO L432 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-02-02 10:52:35,864 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-02 10:52:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-02-02 10:52:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 10:52:35,865 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 10:52:35,865 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 10:52:35,865 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation, strlen_recErr1RequiresViolation, strlen_recErr0RequiresViolation]=== [2018-02-02 10:52:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash -407198233, 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 [2018-02-02 10:52:35,869 INFO L67 tionRefinementEngine]: Using refinement strategy FixedTraceAbstractionRefinementStrategy [2018-02-02 10:52:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 10:52:35,910 WARN L195 Executor]: ExternalInterpolator (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in) stderr output: WARNING: array quantifier Unsupported proof rule: (let ((a!1 (= (+ |main_#t~nondet2_4| 0 (* (- 1) (select |#length_7| |main_#t~malloc3.base_7|))) (+ |main_#t~nondet2_4| (* (- 1) (select |#length_7| |main_#t~malloc3.base_7|)))))) (rewrite a!1)) [2018-02-02 10:52:35,911 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 66 column 248: theory not supported by interpolation or bad proof at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:206) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseInterpolants(Executor.java:255) at de.uni_freiburg.informatik.ultimate.smtsolver.external.ScriptorWithGetInterpolants.readInterpolants(ScriptorWithGetInterpolants.java:136) at de.uni_freiburg.informatik.ultimate.smtsolver.external.ScriptorWithGetInterpolants.getInterpolants(ScriptorWithGetInterpolants.java:64) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.getInterpolants(DiffWrapperScript.java:260) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:186) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:196) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.FixedTraceAbstractionRefinementStrategy.getTraceCheck(FixedTraceAbstractionRefinementStrategy.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:397) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:115) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:119) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-02-02 10:52:35,914 INFO L168 Benchmark]: Toolchain (without parser) took 1211.19 ms. Allocated memory was 395.8 MB in the beginning and 598.2 MB in the end (delta: 202.4 MB). Free memory was 354.1 MB in the beginning and 552.6 MB in the end (delta: -198.6 MB). Peak memory consumption was 3.8 MB. Max. memory is 5.3 GB. [2018-02-02 10:52:35,915 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 395.8 MB. Free memory is still 359.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 10:52:35,915 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.87 ms. Allocated memory is still 395.8 MB. Free memory was 352.7 MB in the beginning and 343.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-02 10:52:35,916 INFO L168 Benchmark]: Boogie Preprocessor took 26.76 ms. Allocated memory is still 395.8 MB. Free memory was 343.5 MB in the beginning and 340.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 10:52:35,916 INFO L168 Benchmark]: RCFGBuilder took 151.78 ms. Allocated memory is still 395.8 MB. Free memory was 340.8 MB in the beginning and 326.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 5.3 GB. [2018-02-02 10:52:35,917 INFO L168 Benchmark]: TraceAbstraction took 869.01 ms. Allocated memory was 395.8 MB in the beginning and 598.2 MB in the end (delta: 202.4 MB). Free memory was 326.7 MB in the beginning and 552.6 MB in the end (delta: -225.9 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 10:52:35,919 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 395.8 MB. Free memory is still 359.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 160.87 ms. Allocated memory is still 395.8 MB. Free memory was 352.7 MB in the beginning and 343.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.76 ms. Allocated memory is still 395.8 MB. Free memory was 343.5 MB in the beginning and 340.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 151.78 ms. Allocated memory is still 395.8 MB. Free memory was 340.8 MB in the beginning and 326.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 5.3 GB. * TraceAbstraction took 869.01 ms. Allocated memory was 395.8 MB in the beginning and 598.2 MB in the end (delta: 202.4 MB). Free memory was 326.7 MB in the beginning and 552.6 MB in the end (delta: -225.9 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 66 column 248: theory not supported by interpolation or bad proof de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 66 column 248: theory not supported by interpolation or bad proof: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1420) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec_strlen-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_z3.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_10-52-35-927.csv Received shutdown request...