/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:43:29,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:43:29,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:43:29,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:43:29,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:43:29,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:43:29,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:43:29,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:43:29,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:43:29,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:43:29,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:43:29,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:43:29,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:43:29,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:43:29,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:43:29,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:43:29,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:43:29,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:43:29,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:43:29,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:43:29,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:43:29,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:43:29,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:43:29,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:43:29,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:43:29,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:43:29,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:43:29,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:43:29,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:43:29,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:43:29,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:43:29,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:43:29,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:43:29,282 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:43:29,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:43:29,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:43:29,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:43:29,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:43:29,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:43:29,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:43:29,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:43:29,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:43:29,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:43:29,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:43:29,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:43:29,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:43:29,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:43:29,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:43:29,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:43:29,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:43:29,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:43:29,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:43:29,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:43:29,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:43:29,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:43:29,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:43:29,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:43:29,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:43:29,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:43:29,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:43:29,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:43:29,841 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:43:29,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:43:29,844 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:43:29,845 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-09-04 13:43:29,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc04c5a27/1b647a4662184c9aba20d91f377c2607/FLAG85a1d4ab8 [2020-09-04 13:43:30,567 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:43:30,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-09-04 13:43:30,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc04c5a27/1b647a4662184c9aba20d91f377c2607/FLAG85a1d4ab8 [2020-09-04 13:43:30,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc04c5a27/1b647a4662184c9aba20d91f377c2607 [2020-09-04 13:43:30,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:43:30,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:43:30,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:30,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:43:30,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:43:30,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:30" (1/1) ... [2020-09-04 13:43:30,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a9c366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:30, skipping insertion in model container [2020-09-04 13:43:30,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:30" (1/1) ... [2020-09-04 13:43:31,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:43:31,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:43:31,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:31,271 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:43:31,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:31,308 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:43:31,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31 WrapperNode [2020-09-04 13:43:31,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:31,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:43:31,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:43:31,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:43:31,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... [2020-09-04 13:43:31,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... [2020-09-04 13:43:31,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... [2020-09-04 13:43:31,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... [2020-09-04 13:43:31,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... [2020-09-04 13:43:31,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... [2020-09-04 13:43:31,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... [2020-09-04 13:43:31,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:43:31,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:43:31,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:43:31,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:43:31,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:31,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:43:31,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:43:31,540 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:43:31,540 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2020-09-04 13:43:31,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:43:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:43:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:43:31,540 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2020-09-04 13:43:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:43:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:43:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:43:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:43:31,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:43:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:43:31,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:43:31,881 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:43:31,881 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 13:43:31,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:31 BoogieIcfgContainer [2020-09-04 13:43:31,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:43:31,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:43:31,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:43:31,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:43:31,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:43:30" (1/3) ... [2020-09-04 13:43:31,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@831166f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:31, skipping insertion in model container [2020-09-04 13:43:31,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:31" (2/3) ... [2020-09-04 13:43:31,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@831166f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:31, skipping insertion in model container [2020-09-04 13:43:31,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:31" (3/3) ... [2020-09-04 13:43:31,898 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2020-09-04 13:43:31,921 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:43:31,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:43:31,958 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:43:31,993 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:43:31,994 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:43:31,994 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:43:31,994 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:43:31,994 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:43:31,994 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:43:31,994 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:43:31,994 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:43:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-04 13:43:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:43:32,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:32,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:32,030 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1626450083, now seen corresponding path program 1 times [2020-09-04 13:43:32,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:32,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232728360] [2020-09-04 13:43:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:32,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:32,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232728360] [2020-09-04 13:43:32,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:32,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 13:43:32,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573969398] [2020-09-04 13:43:32,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:43:32,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:43:32,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:43:32,519 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 8 states. [2020-09-04 13:43:32,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:32,903 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-09-04 13:43:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:43:32,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-09-04 13:43:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:32,919 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:43:32,919 INFO L226 Difference]: Without dead ends: 26 [2020-09-04 13:43:32,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:43:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-04 13:43:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-04 13:43:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:43:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-09-04 13:43:32,983 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 13 [2020-09-04 13:43:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:32,984 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-09-04 13:43:32,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:43:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-09-04 13:43:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 13:43:32,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:32,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:32,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:43:32,988 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash -519824651, now seen corresponding path program 1 times [2020-09-04 13:43:32,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:32,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003701356] [2020-09-04 13:43:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:33,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:43:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:33,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:43:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:33,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003701356] [2020-09-04 13:43:33,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591258823] [2020-09-04 13:43:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:33,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:43:33,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:33,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:33,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:43:33,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2020-09-04 13:43:33,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606319870] [2020-09-04 13:43:33,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:43:33,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:43:33,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:43:33,486 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 11 states. [2020-09-04 13:43:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:33,811 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-04 13:43:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:43:33,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-09-04 13:43:33,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:33,815 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:43:33,815 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:43:33,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:43:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:43:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-04 13:43:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:43:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-04 13:43:33,827 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 21 [2020-09-04 13:43:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:33,828 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-04 13:43:33,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:43:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-04 13:43:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 13:43:33,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:33,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:34,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:43:34,046 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:34,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2027370867, now seen corresponding path program 2 times [2020-09-04 13:43:34,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:34,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732768833] [2020-09-04 13:43:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:43:34,124 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:43:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:43:34,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:43:34,210 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:43:34,210 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:43:34,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:43:34,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:43:34 BoogieIcfgContainer [2020-09-04 13:43:34,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:43:34,265 INFO L168 Benchmark]: Toolchain (without parser) took 3287.29 ms. Allocated memory was 144.7 MB in the beginning and 230.2 MB in the end (delta: 85.5 MB). Free memory was 100.5 MB in the beginning and 135.4 MB in the end (delta: -34.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:34,266 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:43:34,267 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.57 ms. Allocated memory is still 144.7 MB. Free memory was 100.2 MB in the beginning and 90.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:34,268 INFO L168 Benchmark]: Boogie Preprocessor took 149.13 ms. Allocated memory was 144.7 MB in the beginning and 199.8 MB in the end (delta: 55.1 MB). Free memory was 90.4 MB in the beginning and 176.9 MB in the end (delta: -86.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:34,269 INFO L168 Benchmark]: RCFGBuilder took 428.21 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 162.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:34,270 INFO L168 Benchmark]: TraceAbstraction took 2371.66 ms. Allocated memory was 199.8 MB in the beginning and 230.2 MB in the end (delta: 30.4 MB). Free memory was 161.3 MB in the beginning and 135.4 MB in the end (delta: 25.9 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:34,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 144.7 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.57 ms. Allocated memory is still 144.7 MB. Free memory was 100.2 MB in the beginning and 90.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.13 ms. Allocated memory was 144.7 MB in the beginning and 199.8 MB in the end (delta: 55.1 MB). Free memory was 90.4 MB in the beginning and 176.9 MB in the end (delta: -86.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.21 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 162.0 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2371.66 ms. Allocated memory was 199.8 MB in the beginning and 230.2 MB in the end (delta: 30.4 MB). Free memory was 161.3 MB in the beginning and 135.4 MB in the end (delta: 25.9 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] Char *tmp; VAL [\old(tmp)=32, \old(tmp)=30, tmp={0:0}] [L29] Char pathbuf[1 +1]; [L31] Char *bound = pathbuf + sizeof(pathbuf) - 1; [L33] tmp = pathbuf + sizeof(pathbuf)/sizeof(*pathbuf) - 1 VAL [\old(tmp)=0, \old(tmp)=0, bound={2:28}, pathbuf={2:0}, tmp={2:4}] [L35] CALL glob2 (pathbuf, bound) VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={2:0}, pathlim={2:28}, tmp={2:4}] [L16] Char *p; [L18] p = pathbuf VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={2:4}] [L20] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L21] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={2:4}] [L20] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L21] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={2:8}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:8}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, cond=0, tmp={2:4}] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, cond=0, tmp={2:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 74 SDslu, 82 SDs, 0 SdLazy, 218 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 4480 SizeOfPredicates, 7 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...