./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test20.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6a4fb114da53a764304d986fec12e4f313da2507 ..................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:43:50,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:43:50,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:43:50,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:43:50,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:43:50,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:43:50,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:43:50,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:43:50,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:43:50,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:43:50,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:43:50,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:43:50,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:43:50,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:43:50,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:43:50,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:43:50,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:43:50,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:43:50,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:43:50,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:43:50,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:43:50,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:43:50,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:43:50,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:43:50,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:43:50,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:43:50,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:43:50,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:43:50,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:43:50,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:43:50,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:43:50,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:43:50,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:43:50,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:43:50,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:43:50,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:43:50,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:43:50,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:43:50,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:43:50,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:43:50,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:43:50,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:43:50,337 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:43:50,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:43:50,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:43:50,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:43:50,341 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:43:50,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:43:50,341 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:43:50,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:43:50,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:43:50,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:43:50,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:43:50,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:43:50,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:43:50,344 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:43:50,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:43:50,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:43:50,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:43:50,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:43:50,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:43:50,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:43:50,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:43:50,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:43:50,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:43:50,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:43:50,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:43:50,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:43:50,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:43:50,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:43:50,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:43:50,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a4fb114da53a764304d986fec12e4f313da2507 [2020-10-20 00:43:50,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:43:50,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:43:50,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:43:50,632 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:43:50,634 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:43:50,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test20.c [2020-10-20 00:43:50,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2623b400/a164e5a9964943d6af206479ebe5482e/FLAG8ed103f85 [2020-10-20 00:43:51,245 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:43:51,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test20.c [2020-10-20 00:43:51,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2623b400/a164e5a9964943d6af206479ebe5482e/FLAG8ed103f85 [2020-10-20 00:43:51,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2623b400/a164e5a9964943d6af206479ebe5482e [2020-10-20 00:43:51,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:43:51,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:43:51,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:51,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:43:51,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:43:51,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d667dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51, skipping insertion in model container [2020-10-20 00:43:51,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:43:51,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:43:51,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:51,872 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:43:51,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:51,900 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:43:51,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51 WrapperNode [2020-10-20 00:43:51,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:51,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:51,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:43:51,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:43:51,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:51,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:43:51,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:43:51,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:43:51,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (1/1) ... [2020-10-20 00:43:51,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:43:51,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:43:51,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:43:51,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:43:51,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (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 [2020-10-20 00:43:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:43:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:43:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:43:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:43:52,224 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:43:52,224 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 00:43:52,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:52 BoogieIcfgContainer [2020-10-20 00:43:52,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:43:52,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:43:52,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:43:52,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:43:52,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:43:51" (1/3) ... [2020-10-20 00:43:52,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d7713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:52, skipping insertion in model container [2020-10-20 00:43:52,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:51" (2/3) ... [2020-10-20 00:43:52,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d7713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:52, skipping insertion in model container [2020-10-20 00:43:52,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:52" (3/3) ... [2020-10-20 00:43:52,234 INFO L111 eAbstractionObserver]: Analyzing ICFG test20.c [2020-10-20 00:43:52,247 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:43:52,255 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:43:52,268 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:43:52,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:43:52,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:43:52,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:43:52,288 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:43:52,288 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:43:52,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:43:52,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:43:52,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:43:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-10-20 00:43:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-20 00:43:52,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:52,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-20 00:43:52,309 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:52,314 INFO L82 PathProgramCache]: Analyzing trace with hash 925607, now seen corresponding path program 1 times [2020-10-20 00:43:52,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:52,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069788075] [2020-10-20 00:43:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:52,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069788075] [2020-10-20 00:43:52,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:43:52,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:43:52,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193130209] [2020-10-20 00:43:52,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:43:52,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:43:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:43:52,582 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2020-10-20 00:43:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:52,638 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-10-20 00:43:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:43:52,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-10-20 00:43:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:52,650 INFO L225 Difference]: With dead ends: 14 [2020-10-20 00:43:52,651 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:43:52,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:43:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:43:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:43:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:43:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:43:52,676 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2020-10-20 00:43:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:52,677 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:43:52,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:43:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:43:52,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:43:52,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:43:52,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:43:52,711 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:43:52,712 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:43:52,712 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:43:52,712 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:43:52,712 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:43:52,713 INFO L270 CegarLoopResult]: At program point L20(lines 18 21) the Hoare annotation is: (and (not (= ULTIMATE.start_equal_~a.base ULTIMATE.start_equal_~b.base)) (not (= |~#b~0.base| |~#a~0.base|))) [2020-10-20 00:43:52,713 INFO L270 CegarLoopResult]: At program point L13(lines 6 14) the Hoare annotation is: (and (not (= ULTIMATE.start_equal_~a.base ULTIMATE.start_equal_~b.base)) (not (= |~#b~0.base| |~#a~0.base|))) [2020-10-20 00:43:52,713 INFO L270 CegarLoopResult]: At program point L8(lines 6 14) the Hoare annotation is: false [2020-10-20 00:43:52,713 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-20 00:43:52,714 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:43:52,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:43:52 BoogieIcfgContainer [2020-10-20 00:43:52,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:43:52,732 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:43:52,732 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:43:52,732 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:43:52,733 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:52" (3/4) ... [2020-10-20 00:43:52,736 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:43:52,745 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-20 00:43:52,745 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 00:43:52,745 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:43:52,745 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:43:52,799 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:43:52,799 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:43:52,802 INFO L168 Benchmark]: Toolchain (without parser) took 1157.68 ms. Allocated memory was 42.5 MB in the beginning and 47.7 MB in the end (delta: 5.2 MB). Free memory was 20.7 MB in the beginning and 28.5 MB in the end (delta: -7.8 MB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,803 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.69 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 19.9 MB in the beginning and 20.4 MB in the end (delta: -572.5 kB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,805 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.01 ms. Allocated memory is still 43.0 MB. Free memory was 20.4 MB in the beginning and 18.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,806 INFO L168 Benchmark]: Boogie Preprocessor took 17.91 ms. Allocated memory is still 43.0 MB. Free memory was 18.9 MB in the beginning and 17.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,807 INFO L168 Benchmark]: RCFGBuilder took 273.61 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 17.6 MB in the beginning and 21.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,808 INFO L168 Benchmark]: TraceAbstraction took 504.35 ms. Allocated memory was 44.6 MB in the beginning and 45.1 MB in the end (delta: 524.3 kB). Free memory was 21.0 MB in the beginning and 11.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,809 INFO L168 Benchmark]: Witness Printer took 67.78 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 11.7 MB in the beginning and 28.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:52,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 31.5 MB. Free memory was 7.6 MB in the beginning and 7.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 252.69 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 19.9 MB in the beginning and 20.4 MB in the end (delta: -572.5 kB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 32.01 ms. Allocated memory is still 43.0 MB. Free memory was 20.4 MB in the beginning and 18.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 17.91 ms. Allocated memory is still 43.0 MB. Free memory was 18.9 MB in the beginning and 17.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 273.61 ms. Allocated memory was 43.0 MB in the beginning and 44.6 MB in the end (delta: 1.6 MB). Free memory was 17.6 MB in the beginning and 21.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 504.35 ms. Allocated memory was 44.6 MB in the beginning and 45.1 MB in the end (delta: 524.3 kB). Free memory was 21.0 MB in the beginning and 11.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. * Witness Printer took 67.78 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 11.7 MB in the beginning and 28.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: !(a == b) && !(b == a) - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: !(a == b) && !(b == a) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 9 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 19 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 27 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...