/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 15:02:58,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:02:58,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:02:58,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:02:58,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:02:58,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:02:58,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:02:58,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:02:58,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:02:58,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:02:58,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:02:58,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:02:58,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:02:58,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:02:58,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:02:58,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:02:58,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:02:58,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:02:58,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:02:58,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:02:58,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:02:58,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:02:58,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:02:58,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:02:58,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:02:58,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:02:58,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:02:58,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:02:58,373 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 [2020-08-21 15:02:58,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:02:58,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:02:58,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:02:58,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:02:58,421 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:02:58,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:02:58,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:02:58,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:02:58,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:02:58,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:02:58,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:02:58,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:02:58,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:02:58,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:02:58,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:02:58,424 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:02:58,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:02:58,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:02:58,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:02:58,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:02:58,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:02:58,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:02:58,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:02:58,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:02:58,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:02:58,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:02:58,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:02:58,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:02:58,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:02:58,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:02:58,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:02:58,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:02:58,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:02:58,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:02:58,766 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:02:58,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-08-21 15:02:58,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48ad213ea/8652714c59c241c899e7b9090dd57207/FLAG74d7236f9 [2020-08-21 15:02:59,303 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:02:59,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-08-21 15:02:59,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48ad213ea/8652714c59c241c899e7b9090dd57207/FLAG74d7236f9 [2020-08-21 15:02:59,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48ad213ea/8652714c59c241c899e7b9090dd57207 [2020-08-21 15:02:59,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:02:59,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:02:59,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:59,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:02:59,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:02:59,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c07bf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59, skipping insertion in model container [2020-08-21 15:02:59,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:02:59,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:02:59,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:02:59,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:59,941 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:02:59,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:02:59,973 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:02:59,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59 WrapperNode [2020-08-21 15:02:59,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:02:59,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:02:59,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:02:59,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:03:00,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:03:00,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:03:00,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:03:00,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:03:00,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:03:00,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:03:00,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (1/1) ... [2020-08-21 15:03:00,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:03:00,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:03:00,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:03:00,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:03:00,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (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 [2020-08-21 15:03:00,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:03:00,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:03:00,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:03:00,184 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2020-08-21 15:03:00,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:03:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:03:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:03:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2020-08-21 15:03:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:03:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:03:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:03:00,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:03:00,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:03:00,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:03:00,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:03:00,433 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:03:00,433 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:03:00,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:03:00 BoogieIcfgContainer [2020-08-21 15:03:00,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:03:00,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:03:00,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:03:00,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:03:00,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:02:59" (1/3) ... [2020-08-21 15:03:00,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307cc65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:03:00, skipping insertion in model container [2020-08-21 15:03:00,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:02:59" (2/3) ... [2020-08-21 15:03:00,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307cc65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:03:00, skipping insertion in model container [2020-08-21 15:03:00,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:03:00" (3/3) ... [2020-08-21 15:03:00,448 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2020-08-21 15:03:00,462 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:03:00,471 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:03:00,504 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:03:00,548 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:03:00,548 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:03:00,548 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:03:00,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:03:00,549 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:03:00,549 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:03:00,549 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:03:00,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:03:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-21 15:03:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 15:03:00,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:00,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:00,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1626450083, now seen corresponding path program 1 times [2020-08-21 15:03:00,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:00,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79255050] [2020-08-21 15:03:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:00,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:00,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79255050] [2020-08-21 15:03:00,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:03:00,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 15:03:00,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323685554] [2020-08-21 15:03:00,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:03:00,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:03:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:03:00,923 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 8 states. [2020-08-21 15:03:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:01,286 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-08-21 15:03:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:03:01,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-21 15:03:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:01,298 INFO L225 Difference]: With dead ends: 55 [2020-08-21 15:03:01,298 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 15:03:01,303 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 [2020-08-21 15:03:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 15:03:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-08-21 15:03:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 15:03:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-08-21 15:03:01,349 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 13 [2020-08-21 15:03:01,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:01,349 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-08-21 15:03:01,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:03:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-08-21 15:03:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 15:03:01,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:01,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:01,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:03:01,352 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:01,353 INFO L82 PathProgramCache]: Analyzing trace with hash -519824651, now seen corresponding path program 1 times [2020-08-21 15:03:01,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:01,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332277339] [2020-08-21 15:03:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:03:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 15:03:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:03:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:03:01,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332277339] [2020-08-21 15:03:01,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:03:01,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:03:01,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666263691] [2020-08-21 15:03:01,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:03:01,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:03:01,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:03:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:03:01,569 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-08-21 15:03:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:03:01,857 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-08-21 15:03:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:03:01,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-08-21 15:03:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:03:01,859 INFO L225 Difference]: With dead ends: 36 [2020-08-21 15:03:01,860 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 15:03:01,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-21 15:03:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 15:03:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 15:03:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 15:03:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-08-21 15:03:01,871 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 21 [2020-08-21 15:03:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:03:01,872 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-08-21 15:03:01,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:03:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-08-21 15:03:01,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 15:03:01,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:03:01,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:03:01,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:03:01,874 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:03:01,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:03:01,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2027370867, now seen corresponding path program 2 times [2020-08-21 15:03:01,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:03:01,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721202641] [2020-08-21 15:03:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:03:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:03:01,906 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:03:01,906 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:03:01,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:03:01,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:03:01 BoogieIcfgContainer [2020-08-21 15:03:01,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:03:01,932 INFO L168 Benchmark]: Toolchain (without parser) took 2209.65 ms. Allocated memory was 140.5 MB in the beginning and 233.8 MB in the end (delta: 93.3 MB). Free memory was 103.0 MB in the beginning and 159.2 MB in the end (delta: -56.2 MB). Peak memory consumption was 37.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:01,933 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:03:01,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.49 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:01,935 INFO L168 Benchmark]: Boogie Preprocessor took 137.26 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.8 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:01,936 INFO L168 Benchmark]: RCFGBuilder took 328.10 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 165.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:01,937 INFO L168 Benchmark]: TraceAbstraction took 1487.62 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 165.0 MB in the beginning and 159.2 MB in the end (delta: 5.8 MB). Peak memory consumption was 36.2 MB. Max. memory is 7.1 GB. [2020-08-21 15:03:01,941 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.49 ms. Allocated memory is still 140.5 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.26 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.8 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.10 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 165.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1487.62 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 165.0 MB in the beginning and 159.2 MB in the end (delta: 5.8 MB). Peak memory consumption was 36.2 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; [L29] Char pathbuf[1 +1]; [L31] Char *bound = pathbuf + sizeof(pathbuf) - 1; [L33] tmp = pathbuf + sizeof(pathbuf)/sizeof(*pathbuf) - 1 [L35] CALL glob2 (pathbuf, bound) [L16] Char *p; [L18] p = pathbuf [L18] COND TRUE p <= pathlim [L20] CALL __VERIFIER_assert(p<=tmp) [L4] COND FALSE !(!(cond)) [L20] RET __VERIFIER_assert(p<=tmp) [L21] *p = 1 [L18] p++ [L18] COND TRUE p <= pathlim [L20] CALL __VERIFIER_assert(p<=tmp) [L4] COND FALSE !(!(cond)) [L20] RET __VERIFIER_assert(p<=tmp) [L21] *p = 1 [L18] p++ [L18] COND TRUE p <= pathlim [L20] CALL __VERIFIER_assert(p<=tmp) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 74 SDslu, 71 SDs, 0 SdLazy, 189 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s 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, 0.3s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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...