java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --traceabstraction.dump.automata.to.the.following.directory dump --rcfgbuilder.size.of.a.code.block SingleStatement --cacsl2boogietranslator.bitprecise.bitfields false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrncpy_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c5b1954-m [2018-10-10 14:41:22,959 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-10 14:41:22,961 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-10 14:41:22,973 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-10 14:41:22,973 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-10 14:41:22,975 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-10 14:41:22,976 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-10 14:41:22,982 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-10 14:41:22,984 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-10 14:41:22,985 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-10 14:41:22,986 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-10 14:41:22,986 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-10 14:41:22,988 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-10 14:41:22,989 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-10 14:41:22,990 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-10 14:41:22,991 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-10 14:41:22,992 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-10 14:41:22,994 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-10 14:41:22,996 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-10 14:41:22,998 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-10 14:41:22,999 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-10 14:41:23,001 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-10 14:41:23,003 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-10 14:41:23,004 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-10 14:41:23,004 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-10 14:41:23,005 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-10 14:41:23,006 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-10 14:41:23,007 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-10 14:41:23,008 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-10 14:41:23,009 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-10 14:41:23,010 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-10 14:41:23,010 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-10 14:41:23,018 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2018-10-10 14:41:23,048 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-10 14:41:23,048 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-10 14:41:23,053 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-10 14:41:23,053 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-10 14:41:23,053 INFO L133 SettingsManager]: * Use SBE=true [2018-10-10 14:41:23,053 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-10 14:41:23,053 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-10 14:41:23,055 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-10 14:41:23,055 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-10 14:41:23,055 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-10 14:41:23,055 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-10 14:41:23,056 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-10-10 14:41:23,056 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-10-10 14:41:23,056 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-10-10 14:41:23,056 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-10 14:41:23,056 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-10 14:41:23,058 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-10 14:41:23,058 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-10 14:41:23,058 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-10 14:41:23,058 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-10 14:41:23,059 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-10 14:41:23,059 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-10 14:41:23,059 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-10 14:41:23,059 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-10 14:41:23,060 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-10 14:41:23,060 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Dump automata to the following directory -> dump Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Bitprecise bitfields -> false [2018-10-10 14:41:23,117 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-10 14:41:23,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-10 14:41:23,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-10 14:41:23,139 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-10 14:41:23,140 INFO L276 PluginConnector]: CDTParser initialized [2018-10-10 14:41:23,143 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrncpy_unsafe_false-valid-deref.i [2018-10-10 14:41:23,442 INFO L217 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cfa7d9ab/d146d7cc5dcf4afdb6acf2963a8159e6/FLAG8d0bf7d8c [2018-10-10 14:41:23,646 INFO L289 CDTParser]: Found 1 translation units. [2018-10-10 14:41:23,646 INFO L157 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-memsafety/cstrncpy_unsafe_false-valid-deref.i [2018-10-10 14:41:23,654 INFO L337 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cfa7d9ab/d146d7cc5dcf4afdb6acf2963a8159e6/FLAG8d0bf7d8c [2018-10-10 14:41:23,671 INFO L345 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cfa7d9ab/d146d7cc5dcf4afdb6acf2963a8159e6 [2018-10-10 14:41:23,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-10 14:41:23,687 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-10 14:41:23,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-10 14:41:23,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-10 14:41:23,692 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-10 14:41:23,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 02:41:23" (1/1) ... [2018-10-10 14:41:23,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:23, skipping insertion in model container [2018-10-10 14:41:23,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 02:41:23" (1/1) ... [2018-10-10 14:41:23,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-10 14:41:23,732 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-10 14:41:23,960 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-10 14:41:23,975 INFO L189 MainTranslator]: Completed pre-run [2018-10-10 14:41:23,997 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-10 14:41:24,016 INFO L193 MainTranslator]: Completed translation [2018-10-10 14:41:24,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24 WrapperNode [2018-10-10 14:41:24,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-10 14:41:24,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-10 14:41:24,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-10 14:41:24,018 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-10 14:41:24,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-10 14:41:24,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-10 14:41:24,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-10 14:41:24,070 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-10 14:41:24,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... [2018-10-10 14:41:24,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-10 14:41:24,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-10 14:41:24,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-10 14:41:24,119 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-10 14:41:24,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (1/1) ... No working directory specified, using /storage/repos/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 [2018-10-10 14:41:24,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-10 14:41:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-10 14:41:25,084 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-10 14:41:25,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 02:41:25 BoogieIcfgContainer [2018-10-10 14:41:25,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-10 14:41:25,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-10 14:41:25,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-10 14:41:25,090 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-10 14:41:25,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 02:41:23" (1/3) ... [2018-10-10 14:41:25,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf8c8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 02:41:25, skipping insertion in model container [2018-10-10 14:41:25,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 02:41:24" (2/3) ... [2018-10-10 14:41:25,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf8c8b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 02:41:25, skipping insertion in model container [2018-10-10 14:41:25,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 02:41:25" (3/3) ... [2018-10-10 14:41:25,094 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy_unsafe_false-valid-deref.i [2018-10-10 14:41:25,104 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-10 14:41:25,113 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-10-10 14:41:25,132 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2018-10-10 14:41:25,161 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-10 14:41:25,162 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-10 14:41:25,162 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-10 14:41:25,162 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-10 14:41:25,162 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-10 14:41:25,163 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-10 14:41:25,163 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-10 14:41:25,163 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-10 14:41:25,163 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-10 14:41:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2018-10-10 14:41:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-10 14:41:25,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 14:41:25,193 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 14:41:25,196 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK]=== [2018-10-10 14:41:25,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 14:41:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash -426419353, now seen corresponding path program 1 times [2018-10-10 14:41:25,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-10 14:41:25,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-10 14:41:25,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-10 14:41:25,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-10 14:41:25,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-10 14:41:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 14:41:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 14:41:25,346 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 14:41:25,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-10 14:41:25,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-10 14:41:25,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-10 14:41:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-10 14:41:25,374 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 2 states. [2018-10-10 14:41:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 14:41:25,395 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-10 14:41:25,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-10 14:41:25,398 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 31 [2018-10-10 14:41:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 14:41:25,418 INFO L225 Difference]: With dead ends: 99 [2018-10-10 14:41:25,418 INFO L226 Difference]: Without dead ends: 94 [2018-10-10 14:41:25,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-10 14:41:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-10 14:41:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-10 14:41:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-10 14:41:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-10 14:41:25,477 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 31 [2018-10-10 14:41:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 14:41:25,478 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-10 14:41:25,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-10 14:41:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-10 14:41:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-10 14:41:25,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 14:41:25,480 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 14:41:25,481 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK]=== [2018-10-10 14:41:25,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 14:41:25,481 INFO L82 PathProgramCache]: Analyzing trace with hash -520348457, now seen corresponding path program 1 times [2018-10-10 14:41:25,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-10 14:41:25,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-10 14:41:25,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-10 14:41:25,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-10 14:41:25,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-10 14:41:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-10 14:41:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-10 14:41:25,566 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-10 14:41:25,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-10 14:41:25,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-10 14:41:25,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-10 14:41:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-10 14:41:25,569 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 3 states. [2018-10-10 14:41:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-10 14:41:25,642 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-10 14:41:25,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-10 14:41:25,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2018-10-10 14:41:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-10 14:41:25,645 INFO L225 Difference]: With dead ends: 93 [2018-10-10 14:41:25,645 INFO L226 Difference]: Without dead ends: 86 [2018-10-10 14:41:25,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-10 14:41:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-10 14:41:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-10 14:41:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-10 14:41:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-10 14:41:25,665 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 32 [2018-10-10 14:41:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-10 14:41:25,665 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-10 14:41:25,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-10 14:41:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-10 14:41:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-10 14:41:25,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-10 14:41:25,667 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-10 14:41:25,670 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK]=== [2018-10-10 14:41:25,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-10 14:41:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2146058425, now seen corresponding path program 1 times [2018-10-10 14:41:25,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-10 14:41:25,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-10 14:41:25,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-10 14:41:25,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-10 14:41:25,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-10 14:41:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-10 14:41:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-10 14:41:25,753 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-10 14:41:25,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.10 02:41:25 BoogieIcfgContainer [2018-10-10 14:41:25,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-10 14:41:25,794 INFO L168 Benchmark]: Toolchain (without parser) took 2108.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -744.9 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2018-10-10 14:41:25,796 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-10 14:41:25,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-10 14:41:25,798 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-10 14:41:25,799 INFO L168 Benchmark]: Boogie Preprocessor took 48.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-10 14:41:25,799 INFO L168 Benchmark]: RCFGBuilder took 966.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -782.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-10 14:41:25,801 INFO L168 Benchmark]: TraceAbstraction took 707.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-10 14:41:25,806 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 328.97 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 48.39 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 966.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 762.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -782.2 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 707.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 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: [L21] char *s1; [L22] char *s2; [L23] int n = __VERIFIER_nondet_int(); [L24] CALL cstrncpy(s1, s2, n) [L4] char *dst = s1; [L5] const char *src = s2; [L6] char *us; [L7] int n2; [L8] COND TRUE n > 0 [L9] n-- [L10] dst++ [L10] src++ - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 99 locations, 7 error locations. UNSAFE Result, 0.6s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 187 SDtfs, 64 SDslu, 3 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 3535 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...