/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 0.2.0-7d8eed3 [2020-11-06 22:45:34,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:34,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:34,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:34,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:34,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:34,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:35,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:35,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:35,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:35,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:35,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:35,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:35,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:35,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:35,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:35,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:35,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:35,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:35,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:35,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:35,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:35,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:35,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:35,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:45:35,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:35,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:35,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:35,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:35,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:35,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:35,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:35,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:35,167 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:35,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:35,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:35,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:35,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:35,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:35,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:35,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:35,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:35,170 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:35,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:35,171 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:35,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:35,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:35,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:35,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:35,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:35,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:35,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:35,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:35,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:35,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:35,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:35,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:35,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:35,174 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:35,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:35,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:35,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:35,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:35,649 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:35,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-11-06 22:45:35,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a81f9a5/135274dc04a341b4bed4643687bc3804/FLAG70f27c171 [2020-11-06 22:45:36,586 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:36,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-11-06 22:45:36,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a81f9a5/135274dc04a341b4bed4643687bc3804/FLAG70f27c171 [2020-11-06 22:45:36,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a81f9a5/135274dc04a341b4bed4643687bc3804 [2020-11-06 22:45:36,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:36,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:36,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:36,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:36,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:36,923 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:36" (1/1) ... [2020-11-06 22:45:36,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9d2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:36, skipping insertion in model container [2020-11-06 22:45:36,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:36" (1/1) ... [2020-11-06 22:45:36,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:36,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:37,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:37,174 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:37,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:37,221 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:37,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37 WrapperNode [2020-11-06 22:45:37,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:37,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:37,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:37,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:37,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... [2020-11-06 22:45:37,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... [2020-11-06 22:45:37,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... [2020-11-06 22:45:37,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... [2020-11-06 22:45:37,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... [2020-11-06 22:45:37,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... [2020-11-06 22:45:37,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... [2020-11-06 22:45:37,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:37,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:37,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:37,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:37,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:37,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:37,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2020-11-06 22:45:37,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:37,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:45:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:45:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:37,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2020-11-06 22:45:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:37,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:37,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:37,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:37,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:37,781 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:37,781 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:37,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:37 BoogieIcfgContainer [2020-11-06 22:45:37,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:37,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:37,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:37,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:37,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:36" (1/3) ... [2020-11-06 22:45:37,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3119d62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:37, skipping insertion in model container [2020-11-06 22:45:37,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:37" (2/3) ... [2020-11-06 22:45:37,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3119d62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:37, skipping insertion in model container [2020-11-06 22:45:37,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:37" (3/3) ... [2020-11-06 22:45:37,798 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2020-11-06 22:45:37,822 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:37,832 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:37,854 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:37,960 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:37,961 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:37,961 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:37,961 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:37,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:37,962 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:37,962 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:37,962 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-06 22:45:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:45:38,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:38,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:38,018 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:38,034 INFO L82 PathProgramCache]: Analyzing trace with hash -146724392, now seen corresponding path program 1 times [2020-11-06 22:45:38,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:38,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447455162] [2020-11-06 22:45:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:38,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:38,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447455162] [2020-11-06 22:45:38,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:38,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:45:38,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008180599] [2020-11-06 22:45:38,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:45:38,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:45:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:45:38,780 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2020-11-06 22:45:39,647 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-06 22:45:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:39,748 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-11-06 22:45:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:45:39,756 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-06 22:45:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:39,765 INFO L225 Difference]: With dead ends: 62 [2020-11-06 22:45:39,765 INFO L226 Difference]: Without dead ends: 28 [2020-11-06 22:45:39,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:45:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-06 22:45:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-11-06 22:45:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:45:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-11-06 22:45:39,827 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2020-11-06 22:45:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:39,827 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-11-06 22:45:39,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:45:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-11-06 22:45:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:45:39,829 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:39,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:39,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:39,830 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1818918482, now seen corresponding path program 1 times [2020-11-06 22:45:39,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:39,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294302648] [2020-11-06 22:45:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:45:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:40,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294302648] [2020-11-06 22:45:40,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434157810] [2020-11-06 22:45:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-11-06 22:45:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:45:40,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:40,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:45:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:40,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:40,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-11-06 22:45:40,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424633041] [2020-11-06 22:45:40,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:45:40,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:45:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:45:40,650 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 14 states. [2020-11-06 22:45:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:41,473 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-11-06 22:45:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:45:41,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-11-06 22:45:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:41,476 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:45:41,477 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:45:41,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:45:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:45:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-06 22:45:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:45:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-11-06 22:45:41,491 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 23 [2020-11-06 22:45:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:41,491 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-11-06 22:45:41,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:45:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-11-06 22:45:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-06 22:45:41,493 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:41,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:41,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:45:41,710 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:41,712 INFO L82 PathProgramCache]: Analyzing trace with hash -824728700, now seen corresponding path program 2 times [2020-11-06 22:45:41,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:41,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15552352] [2020-11-06 22:45:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:41,768 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:41,821 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:41,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:41,875 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:41,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:45:41,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:41 BoogieIcfgContainer [2020-11-06 22:45:41,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:41,946 INFO L168 Benchmark]: Toolchain (without parser) took 5042.17 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 126.5 MB in the beginning and 165.6 MB in the end (delta: -39.1 MB). Peak memory consumption was 98.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:41,947 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:41,948 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.43 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:41,949 INFO L168 Benchmark]: Boogie Preprocessor took 51.11 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:41,950 INFO L168 Benchmark]: RCFGBuilder took 508.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:41,951 INFO L168 Benchmark]: TraceAbstraction took 4157.15 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 99.7 MB in the beginning and 165.6 MB in the end (delta: -65.9 MB). Peak memory consumption was 70.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:41,962 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.43 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.11 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 508.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4157.15 ms. Allocated memory was 151.0 MB in the beginning and 182.5 MB in the end (delta: 31.5 MB). Free memory was 99.7 MB in the beginning and 165.6 MB in the end (delta: -65.9 MB). Peak memory consumption was 70.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] Char *tmp; VAL [\old(tmp)=56, \old(tmp)=52, tmp={0:0}] [L40] Char pathbuf[1 +1]; [L42] Char *bound = pathbuf + sizeof(pathbuf) - 1; [L44] tmp = pathbuf + sizeof(pathbuf)/sizeof(*pathbuf) - 1 VAL [\old(tmp)=0, \old(tmp)=0, bound={3:28}, pathbuf={3:0}, tmp={3:4}] [L46] CALL glob2 (pathbuf, bound) VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={3:0}, pathlim={3:28}, tmp={3:4}] [L27] Char *p; [L29] p = pathbuf VAL [\old(tmp)=0, \old(tmp)=0, p={3:0}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={3:0}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L31] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={3:4}] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={3:4}] [L31] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={3:0}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L32] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={3:0}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={3:4}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={3:4}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L31] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={3:4}] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={3:4}] [L31] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={3:4}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L32] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={3:4}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={3:8}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L29] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={3:8}, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [L31] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, tmp={3:4}] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, cond=0, tmp={3:4}] [L16] CALL reach_error() VAL [\old(tmp)=0, \old(tmp)=0, tmp={3:4}] [L12] COND FALSE !(0) VAL [\old(tmp)=0, \old(tmp)=0, tmp={3:4}] [L12] __assert_fail ("0", "verisec_NetBSD-libc_loop.c", 3, __extension__ __PRETTY_FUNCTION__) VAL [\old(tmp)=0, \old(tmp)=0, tmp={3:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 76 SDslu, 96 SDs, 0 SdLazy, 264 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 5896 SizeOfPredicates, 7 NumberOfNonLiveVariables, 154 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...