/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:41:05,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:41:05,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:41:05,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:41:05,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:41:05,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:41:05,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:41:05,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:41:05,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:41:05,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:41:05,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:41:05,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:41:05,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:41:05,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:41:05,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:41:05,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:41:05,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:41:05,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:41:05,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:41:05,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:41:05,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:41:05,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:41:05,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:41:05,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:41:05,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:41:05,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:41:05,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:41:05,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:41:05,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:41:05,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:41:05,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:41:05,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:41:05,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:41:05,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:41:05,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:41:05,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:41:05,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:41:05,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:41:05,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:41:05,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:41:05,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:41:05,412 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:41:05,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:41:05,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:41:05,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:41:05,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:41:05,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:41:05,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:41:05,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:41:05,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:41:05,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:41:05,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:41:05,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:41:05,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:41:05,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:05,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:41:05,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:41:05,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:41:05,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:41:05,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:41:05,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:41:05,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:41:05,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:41:05,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:41:05,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:41:05,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:41:05,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:41:05,961 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:41:05,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i [2021-01-06 16:41:06,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66f8ae86a/5ef5986a85d14b52a76df011b9055c98/FLAG60d175881 [2021-01-06 16:41:06,750 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:41:06,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i [2021-01-06 16:41:06,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66f8ae86a/5ef5986a85d14b52a76df011b9055c98/FLAG60d175881 [2021-01-06 16:41:07,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/66f8ae86a/5ef5986a85d14b52a76df011b9055c98 [2021-01-06 16:41:07,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:41:07,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:41:07,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:07,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:41:07,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:41:07,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c18ec35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07, skipping insertion in model container [2021-01-06 16:41:07,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:41:07,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:41:07,347 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i[825,838] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: IdentifierExpression[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,GLOBAL] [2021-01-06 16:41:07,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:07,389 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:41:07,409 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/verisec_NetBSD-libc_loop.i[825,838] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: IdentifierExpression[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,GLOBAL] [2021-01-06 16:41:07,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:07,439 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:41:07,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07 WrapperNode [2021-01-06 16:41:07,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:07,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:07,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:41:07,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:41:07,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:07,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:41:07,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:41:07,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:41:07,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... [2021-01-06 16:41:07,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:41:07,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:41:07,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:41:07,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:41:07,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:41:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:41:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:41:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:41:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:41:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:41:07,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:41:08,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:41:08,177 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:41:08,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:08 BoogieIcfgContainer [2021-01-06 16:41:08,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:41:08,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:41:08,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:41:08,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:41:08,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:41:07" (1/3) ... [2021-01-06 16:41:08,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:08, skipping insertion in model container [2021-01-06 16:41:08,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:07" (2/3) ... [2021-01-06 16:41:08,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cb8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:08, skipping insertion in model container [2021-01-06 16:41:08,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:08" (3/3) ... [2021-01-06 16:41:08,235 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2021-01-06 16:41:08,252 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:41:08,264 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:41:08,304 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:41:08,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:41:08,344 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:41:08,344 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:41:08,344 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:41:08,344 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:41:08,344 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:41:08,345 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:41:08,345 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:41:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 16:41:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-06 16:41:08,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:08,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-06 16:41:08,372 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:08,381 INFO L82 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2021-01-06 16:41:08,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:08,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442283852] [2021-01-06 16:41:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:08,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442283852] [2021-01-06 16:41:08,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:08,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:41:08,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080166624] [2021-01-06 16:41:08,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:41:08,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:41:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:41:08,728 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2021-01-06 16:41:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:08,837 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-01-06 16:41:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:41:08,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2021-01-06 16:41:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:08,850 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:41:08,850 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:41:08,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:41:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-01-06 16:41:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:41:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:41:08,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2021-01-06 16:41:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:08,892 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:41:08,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:41:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:41:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:41:08,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:08,894 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:08,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:41:08,894 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash -185344033, now seen corresponding path program 1 times [2021-01-06 16:41:08,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:08,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310663227] [2021-01-06 16:41:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:08,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310663227] [2021-01-06 16:41:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079595323] [2021-01-06 16:41:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:41:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:41:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:09,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:09,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-01-06 16:41:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341708620] [2021-01-06 16:41:09,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:09,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:09,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:09,294 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2021-01-06 16:41:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:09,392 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-01-06 16:41:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:41:09,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 16:41:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:09,395 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:41:09,395 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:41:09,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:41:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2021-01-06 16:41:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:41:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 16:41:09,403 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2021-01-06 16:41:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:09,403 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 16:41:09,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 16:41:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:41:09,405 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:09,405 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2021-01-06 16:41:09,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:41:09,619 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1625670603, now seen corresponding path program 2 times [2021-01-06 16:41:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:09,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309051367] [2021-01-06 16:41:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:41:09,675 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:41:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:41:09,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:41:09,750 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:41:09,751 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:41:09,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:41:09,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:41:09 BoogieIcfgContainer [2021-01-06 16:41:09,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:41:09,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:41:09,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:41:09,794 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:41:09,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:08" (3/4) ... [2021-01-06 16:41:09,796 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:41:09,857 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/verisec_NetBSD-libc_loop.i-witness.graphml [2021-01-06 16:41:09,857 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:41:09,859 INFO L168 Benchmark]: Toolchain (without parser) took 2764.60 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 72.1 MB in the end (delta: 54.1 MB). Peak memory consumption was 55.3 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:09,860 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:41:09,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:09,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:09,862 INFO L168 Benchmark]: Boogie Preprocessor took 31.91 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:09,863 INFO L168 Benchmark]: RCFGBuilder took 656.40 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 101.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:09,864 INFO L168 Benchmark]: TraceAbstraction took 1604.12 ms. Allocated memory is still 151.0 MB. Free memory was 100.8 MB in the beginning and 74.8 MB in the end (delta: 26.1 MB). Peak memory consumption was 27.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:09,865 INFO L168 Benchmark]: Witness Printer took 64.06 ms. Allocated memory is still 151.0 MB. Free memory was 74.2 MB in the beginning and 72.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:09,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 344.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.84 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.91 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 656.40 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 101.4 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1604.12 ms. Allocated memory is still 151.0 MB. Free memory was 100.8 MB in the beginning and 74.8 MB in the end (delta: 26.1 MB). Peak memory consumption was 27.0 MB. Max. memory is 8.0 GB. * Witness Printer took 64.06 ms. Allocated memory is still 151.0 MB. Free memory was 74.2 MB in the beginning and 72.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] Char *tmp; VAL [tmp={0:0}] [L40] Char pathbuf[1 +1]; [L42] Char *bound = pathbuf + sizeof(pathbuf) - 1; [L44] tmp = pathbuf + sizeof(pathbuf)/sizeof(*pathbuf) - 1 [L27] Char *p; [L29] p = pathbuf VAL [tmp={3:4}] [L29] COND TRUE p <= pathlim [L15] COND FALSE !(!(cond)) VAL [tmp={3:4}] [L32] *p = 1 VAL [tmp={3:4}] [L29] p++ VAL [tmp={3:4}] [L29] COND TRUE p <= pathlim [L15] COND FALSE !(!(cond)) VAL [tmp={3:4}] [L32] *p = 1 VAL [tmp={3:4}] [L29] p++ VAL [tmp={3:4}] [L29] COND TRUE p <= pathlim [L15] COND TRUE !(cond) VAL [tmp={3:4}] [L16] reach_error() VAL [tmp={3:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 32 SDslu, 24 SDs, 0 SdLazy, 34 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 872 SizeOfPredicates, 11 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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...