/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:24:59,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:24:59,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:24:59,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:24:59,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:24:59,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:24:59,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:24:59,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:24:59,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:24:59,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:24:59,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:24:59,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:24:59,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:24:59,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:24:59,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:24:59,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:24:59,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:24:59,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:24:59,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:24:59,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:24:59,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:24:59,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:24:59,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:24:59,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:24:59,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:24:59,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:24:59,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:24:59,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:24:59,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:24:59,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:24:59,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:24:59,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:24:59,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:24:59,229 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:24:59,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:24:59,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:24:59,230 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:24:59,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:24:59,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:24:59,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:24:59,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:24:59,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:24:59,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:24:59,231 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:24:59,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:24:59,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:24:59,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:24:59,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:24:59,681 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:24:59,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-10-24 02:24:59,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47dddf806/a327a55dc9ae465ab70722dc105733b0/FLAG29176230b [2020-10-24 02:25:00,418 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:25:00,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-10-24 02:25:00,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47dddf806/a327a55dc9ae465ab70722dc105733b0/FLAG29176230b [2020-10-24 02:25:00,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47dddf806/a327a55dc9ae465ab70722dc105733b0 [2020-10-24 02:25:00,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:25:00,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:25:00,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:00,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:25:00,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:25:00,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:00" (1/1) ... [2020-10-24 02:25:00,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f166a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:00, skipping insertion in model container [2020-10-24 02:25:00,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:25:00" (1/1) ... [2020-10-24 02:25:00,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:25:00,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:25:00,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:01,003 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:25:01,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:25:01,040 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:25:01,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01 WrapperNode [2020-10-24 02:25:01,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:25:01,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:25:01,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:25:01,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:25:01,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (1/1) ... [2020-10-24 02:25:01,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (1/1) ... [2020-10-24 02:25:01,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (1/1) ... [2020-10-24 02:25:01,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (1/1) ... [2020-10-24 02:25:01,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (1/1) ... [2020-10-24 02:25:01,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (1/1) ... [2020-10-24 02:25:01,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (1/1) ... [2020-10-24 02:25:01,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:25:01,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:25:01,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:25:01,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:25:01,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (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 [2020-10-24 02:25:01,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:25:01,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:25:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:25:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:25:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2020-10-24 02:25:01,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:25:01,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:25:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:25:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:25:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:25:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:25:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:25:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:25:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2020-10-24 02:25:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:25:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:25:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:25:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:25:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:25:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:25:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:25:01,668 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:25:01,668 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:25:01,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:01 BoogieIcfgContainer [2020-10-24 02:25:01,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:25:01,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:25:01,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:25:01,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:25:01,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:25:00" (1/3) ... [2020-10-24 02:25:01,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd53aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:01, skipping insertion in model container [2020-10-24 02:25:01,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:25:01" (2/3) ... [2020-10-24 02:25:01,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd53aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:25:01, skipping insertion in model container [2020-10-24 02:25:01,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:25:01" (3/3) ... [2020-10-24 02:25:01,680 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2020-10-24 02:25:01,695 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:25:01,701 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:25:01,733 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:25:01,760 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:25:01,760 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:25:01,760 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:25:01,760 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:25:01,760 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:25:01,761 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:25:01,761 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:25:01,761 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:25:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-24 02:25:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-24 02:25:01,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:01,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:01,791 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:01,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1608563020, now seen corresponding path program 1 times [2020-10-24 02:25:01,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:01,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906546843] [2020-10-24 02:25:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:02,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:02,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906546843] [2020-10-24 02:25:02,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:25:02,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-24 02:25:02,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061306230] [2020-10-24 02:25:02,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:25:02,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:25:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:25:02,380 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 10 states. [2020-10-24 02:25:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:02,950 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-24 02:25:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:25:02,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-24 02:25:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:02,961 INFO L225 Difference]: With dead ends: 88 [2020-10-24 02:25:02,961 INFO L226 Difference]: Without dead ends: 43 [2020-10-24 02:25:02,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:25:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-24 02:25:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-24 02:25:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-24 02:25:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-24 02:25:03,019 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 27 [2020-10-24 02:25:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:03,020 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-24 02:25:03,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:25:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-24 02:25:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 02:25:03,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:03,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:03,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:25:03,023 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:03,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1912813742, now seen corresponding path program 1 times [2020-10-24 02:25:03,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:03,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909991990] [2020-10-24 02:25:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:03,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:03,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-24 02:25:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:25:03,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909991990] [2020-10-24 02:25:03,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:03,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:25:03,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374003135] [2020-10-24 02:25:03,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:25:03,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:25:03,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:25:03,268 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 12 states. [2020-10-24 02:25:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:03,910 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-24 02:25:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:25:03,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-24 02:25:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:03,913 INFO L225 Difference]: With dead ends: 57 [2020-10-24 02:25:03,913 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:25:03,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:25:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:25:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-24 02:25:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-24 02:25:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-10-24 02:25:03,932 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 37 [2020-10-24 02:25:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:03,933 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-10-24 02:25:03,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:25:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-10-24 02:25:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:25:03,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:03,935 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:03,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:25:03,936 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash -935623208, now seen corresponding path program 2 times [2020-10-24 02:25:03,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:03,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261817373] [2020-10-24 02:25:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:25:03,971 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:25:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:25:03,997 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:25:04,048 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:25:04,049 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:25:04,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:25:04,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:25:04 BoogieIcfgContainer [2020-10-24 02:25:04,118 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:25:04,125 INFO L168 Benchmark]: Toolchain (without parser) took 3343.02 ms. Allocated memory was 161.5 MB in the beginning and 196.1 MB in the end (delta: 34.6 MB). Free memory was 138.5 MB in the beginning and 89.1 MB in the end (delta: 49.4 MB). Peak memory consumption was 85.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:04,126 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 161.5 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:25:04,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.54 ms. Allocated memory is still 161.5 MB. Free memory was 138.0 MB in the beginning and 128.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:04,133 INFO L168 Benchmark]: Boogie Preprocessor took 38.34 ms. Allocated memory is still 161.5 MB. Free memory was 128.6 MB in the beginning and 127.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:04,134 INFO L168 Benchmark]: RCFGBuilder took 589.26 ms. Allocated memory is still 161.5 MB. Free memory was 127.0 MB in the beginning and 111.1 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:04,137 INFO L168 Benchmark]: TraceAbstraction took 2446.34 ms. Allocated memory was 161.5 MB in the beginning and 196.1 MB in the end (delta: 34.6 MB). Free memory was 110.6 MB in the beginning and 89.1 MB in the end (delta: 21.5 MB). Peak memory consumption was 57.3 MB. Max. memory is 8.0 GB. [2020-10-24 02:25:04,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 161.5 MB. Free memory is still 134.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.54 ms. Allocated memory is still 161.5 MB. Free memory was 138.0 MB in the beginning and 128.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.34 ms. Allocated memory is still 161.5 MB. Free memory was 128.6 MB in the beginning and 127.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 589.26 ms. Allocated memory is still 161.5 MB. Free memory was 127.0 MB in the beginning and 111.1 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2446.34 ms. Allocated memory was 161.5 MB in the beginning and 196.1 MB in the end (delta: 34.6 MB). Free memory was 110.6 MB in the beginning and 89.1 MB in the end (delta: 21.5 MB). Peak memory consumption was 57.3 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)=52, \old(tmp)=56, tmp={0:0}] [L40] Char pathbuf[1 +1]; VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={3:0}, tmp={0:0}] [L42] Char *bound = pathbuf + sizeof(pathbuf) - 1; VAL [\old(tmp)=0, \old(tmp)=0, bound={3:28}, pathbuf={3:0}, tmp={0:0}] [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; VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={3:0}, pathbuf={3:0}, pathlim={3:28}, pathlim={3:28}, tmp={3:4}] [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, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 151 SDslu, 222 SDs, 0 SdLazy, 340 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=0, 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 62 ConstructedInterpolants, 0 QuantifiedInterpolants, 10102 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...