./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_b5_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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_1.5.800.v20200727-1323.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/recursive-simple/id_b5_o10-2.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 06e263f62ccb25342881e7c795aa9241a1fa8bd0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:32:21,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:32:21,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:32:21,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:32:21,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:32:21,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:32:21,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:32:21,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:32:21,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:32:21,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:32:21,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:32:21,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:32:21,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:32:21,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:32:21,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:32:21,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:32:21,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:32:21,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:32:21,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:32:21,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:32:21,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:32:21,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:32:21,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:32:21,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:32:21,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:32:21,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:32:21,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:32:21,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:32:21,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:32:21,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:32:21,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:32:21,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:32:21,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:32:21,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:32:21,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:32:21,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:32:21,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:32:21,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:32:21,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:32:21,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:32:21,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:32:21,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:32:21,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:32:21,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:32:21,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:32:21,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:32:21,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:32:21,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:32:21,402 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:32:21,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:32:21,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:32:21,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:32:21,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:32:21,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:32:21,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:32:21,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:32:21,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:32:21,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:32:21,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:32:21,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:32:21,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:32:21,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:32:21,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:32:21,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:32:21,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:32:21,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:32:21,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:32:21,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:32:21,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:32:21,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:32:21,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:32:21,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:32:21,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e263f62ccb25342881e7c795aa9241a1fa8bd0 [2021-08-29 16:32:21,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:32:21,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:32:21,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:32:21,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:32:21,673 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:32:21,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b5_o10-2.c [2021-08-29 16:32:21,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec6d57f1/c757f809ba7048fe9ffbbaf67775495f/FLAG9bc494ee7 [2021-08-29 16:32:22,083 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:32:22,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b5_o10-2.c [2021-08-29 16:32:22,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec6d57f1/c757f809ba7048fe9ffbbaf67775495f/FLAG9bc494ee7 [2021-08-29 16:32:22,097 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ec6d57f1/c757f809ba7048fe9ffbbaf67775495f [2021-08-29 16:32:22,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:32:22,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:32:22,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:32:22,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:32:22,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:32:22,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af6dde7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22, skipping insertion in model container [2021-08-29 16:32:22,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:32:22,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:32:22,269 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b5_o10-2.c[530,543] [2021-08-29 16:32:22,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:32:22,276 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:32:22,284 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b5_o10-2.c[530,543] [2021-08-29 16:32:22,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:32:22,308 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:32:22,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22 WrapperNode [2021-08-29 16:32:22,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:32:22,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:32:22,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:32:22,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:32:22,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:32:22,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:32:22,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:32:22,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:32:22,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:32:22,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:32:22,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:32:22,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:32:22,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (1/1) ... [2021-08-29 16:32:22,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:32:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:22,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 16:32:22,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 16:32:22,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:32:22,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:32:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:32:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-08-29 16:32:22,535 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-08-29 16:32:22,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:32:22,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:32:22,694 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:32:22,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:22 BoogieIcfgContainer [2021-08-29 16:32:22,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:32:22,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:32:22,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:32:22,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:32:22,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:32:22" (1/3) ... [2021-08-29 16:32:22,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@effb789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:32:22, skipping insertion in model container [2021-08-29 16:32:22,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:32:22" (2/3) ... [2021-08-29 16:32:22,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@effb789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:32:22, skipping insertion in model container [2021-08-29 16:32:22,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:22" (3/3) ... [2021-08-29 16:32:22,703 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2021-08-29 16:32:22,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:32:22,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:32:22,753 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:32:22,776 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 16:32:22,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:32:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-29 16:32:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 16:32:22,794 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:22,795 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:22,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1972897208, now seen corresponding path program 1 times [2021-08-29 16:32:22,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:22,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041636758] [2021-08-29 16:32:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:22,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:32:23,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:23,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041636758] [2021-08-29 16:32:23,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041636758] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:32:23,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:32:23,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:32:23,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132120868] [2021-08-29 16:32:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:32:23,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:23,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:32:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:32:23,120 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:32:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:23,202 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-08-29 16:32:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:32:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-29 16:32:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:23,207 INFO L225 Difference]: With dead ends: 29 [2021-08-29 16:32:23,208 INFO L226 Difference]: Without dead ends: 16 [2021-08-29 16:32:23,209 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.23ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:32:23,211 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.17ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:23,213 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 59 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 69.17ms Time] [2021-08-29 16:32:23,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-29 16:32:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-29 16:32:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-29 16:32:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-29 16:32:23,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2021-08-29 16:32:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:23,245 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-29 16:32:23,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:32:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-29 16:32:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 16:32:23,246 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:23,247 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:23,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:32:23,247 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1641441273, now seen corresponding path program 1 times [2021-08-29 16:32:23,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:23,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103132134] [2021-08-29 16:32:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:23,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:23,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:23,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103132134] [2021-08-29 16:32:23,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103132134] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:32:23,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:32:23,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:32:23,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798363754] [2021-08-29 16:32:23,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:32:23,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:32:23,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:32:23,320 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-29 16:32:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:23,349 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-08-29 16:32:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:32:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-08-29 16:32:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:23,350 INFO L225 Difference]: With dead ends: 28 [2021-08-29 16:32:23,350 INFO L226 Difference]: Without dead ends: 20 [2021-08-29 16:32:23,350 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.39ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:32:23,351 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.77ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:23,352 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 24.77ms Time] [2021-08-29 16:32:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-29 16:32:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-08-29 16:32:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-29 16:32:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-29 16:32:23,356 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2021-08-29 16:32:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:23,356 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-29 16:32:23,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-29 16:32:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-29 16:32:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 16:32:23,357 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:32:23,357 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:32:23,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 16:32:23,358 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:32:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:32:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1670070424, now seen corresponding path program 1 times [2021-08-29 16:32:23,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:32:23,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241612767] [2021-08-29 16:32:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:23,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:32:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:32:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:23,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:32:23,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241612767] [2021-08-29 16:32:23,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241612767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:32:23,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67631054] [2021-08-29 16:32:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:32:23,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:32:23,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 16:32:23,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:32:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:32:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 16:32:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:32:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:23,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:32:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 16:32:23,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67631054] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:32:23,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:32:23,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-08-29 16:32:23,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390273096] [2021-08-29 16:32:23,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 16:32:23,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:32:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 16:32:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-29 16:32:23,704 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-08-29 16:32:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:32:23,760 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-08-29 16:32:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 16:32:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 17 [2021-08-29 16:32:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:32:23,761 INFO L225 Difference]: With dead ends: 22 [2021-08-29 16:32:23,761 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 16:32:23,762 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 75.80ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-29 16:32:23,763 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.02ms IncrementalHoareTripleChecker+Time [2021-08-29 16:32:23,763 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 90 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 36.02ms Time] [2021-08-29 16:32:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 16:32:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 16:32:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 16:32:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 16:32:23,764 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-08-29 16:32:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:32:23,765 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 16:32:23,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 11 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2021-08-29 16:32:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 16:32:23,765 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 16:32:23,767 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:32:23,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 16:32:23,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:32:23,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 16:32:23,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:32:23,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:32:23,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:32:23,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:32:23,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 16:32:23,993 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 16:32:23,993 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 16:32:23,994 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 16:32:23,994 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 16:32:23,994 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-08-29 16:32:23,994 INFO L858 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-08-29 16:32:23,994 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-08-29 16:32:23,994 INFO L861 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: true [2021-08-29 16:32:23,994 INFO L858 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-08-29 16:32:23,995 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 19) no Hoare annotation was computed. [2021-08-29 16:32:23,995 INFO L858 garLoopResultBuilder]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2021-08-29 16:32:23,995 INFO L858 garLoopResultBuilder]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2021-08-29 16:32:23,995 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-08-29 16:32:23,995 INFO L861 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: true [2021-08-29 16:32:23,995 INFO L861 garLoopResultBuilder]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-08-29 16:32:23,995 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-08-29 16:32:23,995 INFO L858 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-08-29 16:32:23,998 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:32:24,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:32:24 BoogieIcfgContainer [2021-08-29 16:32:24,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:32:24,001 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:32:24,001 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:32:24,002 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:32:24,002 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:32:22" (3/4) ... [2021-08-29 16:32:24,003 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 16:32:24,007 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-08-29 16:32:24,009 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-29 16:32:24,009 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 16:32:24,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:32:24,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 16:32:24,027 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:32:24,027 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:32:24,027 INFO L158 Benchmark]: Toolchain (without parser) took 1922.47ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 42.0MB in the beginning and 33.1MB in the end (delta: 8.8MB). Peak memory consumption was 27.9MB. Max. memory is 16.1GB. [2021-08-29 16:32:24,028 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 46.1MB. Free memory was 28.7MB in the beginning and 28.7MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:32:24,028 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.90ms. Allocated memory is still 56.6MB. Free memory was 41.8MB in the beginning and 32.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:32:24,028 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.90ms. Allocated memory is still 56.6MB. Free memory was 32.5MB in the beginning and 40.3MB in the end (delta: -7.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 16:32:24,035 INFO L158 Benchmark]: Boogie Preprocessor took 20.08ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 39.4MB in the end (delta: 916.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:32:24,035 INFO L158 Benchmark]: RCFGBuilder took 307.19ms. Allocated memory is still 56.6MB. Free memory was 39.4MB in the beginning and 31.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:32:24,035 INFO L158 Benchmark]: TraceAbstraction took 1303.82ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 30.4MB in the beginning and 35.4MB in the end (delta: -5.0MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2021-08-29 16:32:24,036 INFO L158 Benchmark]: Witness Printer took 25.72ms. Allocated memory is still 77.6MB. Free memory was 35.4MB in the beginning and 33.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:32:24,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 46.1MB. Free memory was 28.7MB in the beginning and 28.7MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.90ms. Allocated memory is still 56.6MB. Free memory was 41.8MB in the beginning and 32.5MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.90ms. Allocated memory is still 56.6MB. Free memory was 32.5MB in the beginning and 40.3MB in the end (delta: -7.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.08ms. Allocated memory is still 56.6MB. Free memory was 40.3MB in the beginning and 39.4MB in the end (delta: 916.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 307.19ms. Allocated memory is still 56.6MB. Free memory was 39.4MB in the beginning and 31.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1303.82ms. Allocated memory was 56.6MB in the beginning and 77.6MB in the end (delta: 21.0MB). Free memory was 30.4MB in the beginning and 35.4MB in the end (delta: -5.0MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * Witness Printer took 25.72ms. Allocated memory is still 77.6MB. Free memory was 35.4MB in the beginning and 33.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1246.77ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 8.12ms, AutomataDifference: 221.10ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 9.48ms, InitialAbstractionConstructionTime: 10.84ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 129.97ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 72 SdHoareTripleChecker+Invalid, 97.62ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 162 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 194 IncrementalHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 14 mSDtfsCounter, 194 mSolverCounterSat, 3.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 124.42ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 16.47ms AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 3.90ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.41ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 22.97ms SsaConstructionTime, 61.69ms SatisfiabilityAnalysisTime, 491.79ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 137 SizeOfPredicates, 1 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 10/16 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-29 16:32:24,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...