/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/psyco/psyco_io_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:41:14,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:41:14,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:41:14,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:41:14,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:41:14,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:41:14,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:41:14,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:41:14,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:41:14,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:41:14,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:41:14,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:41:14,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:41:14,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:41:14,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:41:14,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:41:14,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:41:14,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:41:14,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:41:14,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:41:14,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:41:14,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:41:14,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:41:14,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:41:14,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:41:14,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:41:14,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:41:14,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:41:14,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:41:14,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:41:14,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:41:14,214 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:41:14,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:41:14,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:41:14,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:41:14,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:41:14,216 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:41:14,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:41:14,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:41:14,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:41:14,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:41:14,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:41:14,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:41:14,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:41:14,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:41:14,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:41:14,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:41:14,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:41:14,711 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:41:14,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_io_1.c [2020-10-23 21:41:14,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26351ccf4/eb1da9d8ef884ef1a4ca38aa60aef0e3/FLAGc08eb4894 [2020-10-23 21:41:15,497 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:41:15,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_io_1.c [2020-10-23 21:41:15,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26351ccf4/eb1da9d8ef884ef1a4ca38aa60aef0e3/FLAGc08eb4894 [2020-10-23 21:41:15,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26351ccf4/eb1da9d8ef884ef1a4ca38aa60aef0e3 [2020-10-23 21:41:15,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:41:15,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:41:15,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:41:15,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:41:15,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:41:15,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:41:15" (1/1) ... [2020-10-23 21:41:15,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131e8e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:15, skipping insertion in model container [2020-10-23 21:41:15,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:41:15" (1/1) ... [2020-10-23 21:41:15,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:41:15,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:41:16,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:41:16,120 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:41:16,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:41:16,179 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:41:16,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16 WrapperNode [2020-10-23 21:41:16,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:41:16,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:41:16,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:41:16,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:41:16,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (1/1) ... [2020-10-23 21:41:16,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (1/1) ... [2020-10-23 21:41:16,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (1/1) ... [2020-10-23 21:41:16,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (1/1) ... [2020-10-23 21:41:16,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (1/1) ... [2020-10-23 21:41:16,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (1/1) ... [2020-10-23 21:41:16,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (1/1) ... [2020-10-23 21:41:16,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:41:16,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:41:16,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:41:16,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:41:16,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (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 [2020-10-23 21:41:16,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:41:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:41:16,323 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:41:16,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:41:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:41:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:41:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:41:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:41:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:41:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:41:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:41:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:41:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:41:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:41:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:41:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:41:17,169 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:41:17,171 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-23 21:41:17,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:41:17 BoogieIcfgContainer [2020-10-23 21:41:17,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:41:17,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:41:17,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:41:17,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:41:17,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:41:15" (1/3) ... [2020-10-23 21:41:17,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da782a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:41:17, skipping insertion in model container [2020-10-23 21:41:17,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:41:16" (2/3) ... [2020-10-23 21:41:17,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da782a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:41:17, skipping insertion in model container [2020-10-23 21:41:17,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:41:17" (3/3) ... [2020-10-23 21:41:17,191 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_io_1.c [2020-10-23 21:41:17,204 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:41:17,211 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:41:17,228 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:41:17,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:41:17,264 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:41:17,264 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:41:17,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:41:17,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:41:17,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:41:17,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:41:17,265 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:41:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states. [2020-10-23 21:41:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 21:41:17,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:41:17,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:41:17,300 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:41:17,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:41:17,307 INFO L82 PathProgramCache]: Analyzing trace with hash -545522146, now seen corresponding path program 1 times [2020-10-23 21:41:17,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:41:17,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177601196] [2020-10-23 21:41:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:41:17,397 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:41:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:41:17,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:41:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:41:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:41:17,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177601196] [2020-10-23 21:41:17,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:41:17,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:41:17,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727882533] [2020-10-23 21:41:17,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:41:17,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:41:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:41:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:41:17,666 INFO L87 Difference]: Start difference. First operand 213 states. Second operand 3 states. [2020-10-23 21:41:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:41:17,947 INFO L93 Difference]: Finished difference Result 381 states and 496 transitions. [2020-10-23 21:41:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:41:17,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-10-23 21:41:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:41:17,965 INFO L225 Difference]: With dead ends: 381 [2020-10-23 21:41:17,966 INFO L226 Difference]: Without dead ends: 172 [2020-10-23 21:41:17,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:41:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-23 21:41:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-23 21:41:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-23 21:41:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2020-10-23 21:41:18,074 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 44 [2020-10-23 21:41:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:41:18,075 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2020-10-23 21:41:18,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:41:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2020-10-23 21:41:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 21:41:18,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:41:18,078 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:41:18,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:41:18,079 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:41:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:41:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1499984496, now seen corresponding path program 1 times [2020-10-23 21:41:18,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:41:18,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057333282] [2020-10-23 21:41:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:41:18,083 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:41:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:41:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:41:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:41:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:41:18,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057333282] [2020-10-23 21:41:18,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:41:18,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 21:41:18,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545572915] [2020-10-23 21:41:18,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 21:41:18,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:41:18,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 21:41:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 21:41:18,304 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand 4 states. [2020-10-23 21:41:18,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:41:18,843 INFO L93 Difference]: Finished difference Result 337 states and 398 transitions. [2020-10-23 21:41:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 21:41:18,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-23 21:41:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:41:18,847 INFO L225 Difference]: With dead ends: 337 [2020-10-23 21:41:18,847 INFO L226 Difference]: Without dead ends: 187 [2020-10-23 21:41:18,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:41:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-23 21:41:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-23 21:41:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-23 21:41:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 217 transitions. [2020-10-23 21:41:18,919 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 217 transitions. Word has length 45 [2020-10-23 21:41:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:41:18,920 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 217 transitions. [2020-10-23 21:41:18,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 21:41:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 217 transitions. [2020-10-23 21:41:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 21:41:18,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:41:18,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:41:18,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:41:18,929 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:41:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:41:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash -641108479, now seen corresponding path program 1 times [2020-10-23 21:41:18,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:41:18,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4086264] [2020-10-23 21:41:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:41:20,962 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:21,246 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:21,563 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-23 21:41:21,904 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-23 21:41:21,921 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:22,112 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:22,213 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:22,308 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:22,623 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-23 21:41:22,943 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-23 21:41:22,955 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:23,119 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:23,217 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:23,540 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2020-10-23 21:41:23,868 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-23 21:41:23,883 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:24,045 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:24,137 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:24,478 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-23 21:41:24,793 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2020-10-23 21:41:24,799 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:24,884 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 21:41:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:41:24,949 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:41:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:41:25,013 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:41:25,063 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:41:25,063 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:41:25,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:41:25,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:41:25 BoogieIcfgContainer [2020-10-23 21:41:25,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:41:25,087 INFO L168 Benchmark]: Toolchain (without parser) took 9246.92 ms. Allocated memory was 156.2 MB in the beginning and 285.2 MB in the end (delta: 129.0 MB). Free memory was 132.2 MB in the beginning and 156.7 MB in the end (delta: -24.5 MB). Peak memory consumption was 105.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:41:25,088 INFO L168 Benchmark]: CDTParser took 1.07 ms. Allocated memory is still 156.2 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:41:25,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.63 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 120.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:41:25,090 INFO L168 Benchmark]: Boogie Preprocessor took 49.17 ms. Allocated memory is still 156.2 MB. Free memory was 120.1 MB in the beginning and 118.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:41:25,091 INFO L168 Benchmark]: RCFGBuilder took 944.04 ms. Allocated memory is still 156.2 MB. Free memory was 118.2 MB in the beginning and 114.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:41:25,092 INFO L168 Benchmark]: TraceAbstraction took 7906.42 ms. Allocated memory was 156.2 MB in the beginning and 285.2 MB in the end (delta: 129.0 MB). Free memory was 114.4 MB in the beginning and 156.7 MB in the end (delta: -42.3 MB). Peak memory consumption was 87.2 MB. Max. memory is 8.0 GB. [2020-10-23 21:41:25,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.07 ms. Allocated memory is still 156.2 MB. Free memory is still 129.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 330.63 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 120.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.17 ms. Allocated memory is still 156.2 MB. Free memory was 120.1 MB in the beginning and 118.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 944.04 ms. Allocated memory is still 156.2 MB. Free memory was 118.2 MB in the beginning and 114.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7906.42 ms. Allocated memory was 156.2 MB in the beginning and 285.2 MB in the end (delta: 129.0 MB). Free memory was 114.4 MB in the beginning and 156.7 MB in the end (delta: -42.3 MB). Peak memory consumption was 87.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L7] int m_flush = 1; [L8] int m_PipedOutputStream = 2; [L9] int m_close = 3; [L10] int m_write = 4; [L11] int m_connect_1 = 5; [L12] int m_connect_2 = 6; [L17] int q = 0; [L18] int method_id; [L21] int this_sink = 0; [L22] int this_sinkConnected = 0; [L25] COND TRUE 1 [L28] int P1=__VERIFIER_nondet_int(); [L29] int P2=__VERIFIER_nondet_int(); [L30] int P3=__VERIFIER_nondet_int(); [L31] int P4=__VERIFIER_nondet_int(); [L35] COND TRUE q == 0 [L36] COND TRUE __VERIFIER_nondet_int() [L40] method_id = 2 [L42] COND FALSE !(0) [L46] q = 2 [L48] this_sink=0 [L48] this_sinkConnected=0 [L25] COND TRUE 1 [L28] int P1=__VERIFIER_nondet_int(); [L29] int P2=__VERIFIER_nondet_int(); [L30] int P3=__VERIFIER_nondet_int(); [L31] int P4=__VERIFIER_nondet_int(); [L35] COND FALSE !(q == 0) [L55] COND TRUE q == 1 [L56] COND TRUE __VERIFIER_nondet_int() [L60] method_id = 4 [L62] COND TRUE (this_sink != 0) [L345] CALL reach_error() [L4] __assert_fail("0", "psyco_io_1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 213 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 427 SDtfs, 411 SDslu, 26 SDs, 0 SdLazy, 199 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred 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: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...