./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/McCarthy91-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/McCarthy91-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a5dd5c1c64cd1875ba800cc2db6d1da955f2d2f519c1964ff87558bc42b9b4c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:30:20,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:30:20,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:30:20,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:30:20,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:30:20,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:30:20,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:30:20,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:30:20,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:30:20,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:30:20,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:30:20,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:30:20,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:30:20,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:30:20,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:30:20,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:30:20,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:30:20,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:30:20,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:30:20,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:30:20,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:30:20,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:30:20,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:30:20,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:30:20,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:30:20,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:30:20,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:30:20,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:30:20,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:30:20,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:30:20,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:30:20,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:30:20,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:30:20,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:30:20,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:30:20,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:30:20,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:30:20,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:30:20,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:30:20,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:30:20,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:30:20,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:30:20,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:30:20,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:30:20,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:30:20,686 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:30:20,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:30:20,687 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:30:20,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:30:20,687 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:30:20,687 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:30:20,688 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:30:20,695 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:30:20,695 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:30:20,695 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:30:20,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:30:20,696 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:30:20,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:30:20,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:30:20,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:30:20,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:30:20,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:30:20,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:30:20,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:30:20,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:30:20,698 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:30:20,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:30:20,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:30:20,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:30:20,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:30:20,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:30:20,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:30:20,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:20,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:30:20,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:30:20,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:30:20,702 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:30:20,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:30:20,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:30:20,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:30:20,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:30:20,703 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a5dd5c1c64cd1875ba800cc2db6d1da955f2d2f519c1964ff87558bc42b9b4c [2021-11-07 01:30:20,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:30:21,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:30:21,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:30:21,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:30:21,021 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:30:21,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/recursive/McCarthy91-2.c [2021-11-07 01:30:21,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/data/094b6c718/eb0964f7343a4b0c9586c499e1333e5c/FLAG121744cd3 [2021-11-07 01:30:21,600 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:30:21,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/sv-benchmarks/c/recursive/McCarthy91-2.c [2021-11-07 01:30:21,614 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/data/094b6c718/eb0964f7343a4b0c9586c499e1333e5c/FLAG121744cd3 [2021-11-07 01:30:21,986 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/data/094b6c718/eb0964f7343a4b0c9586c499e1333e5c [2021-11-07 01:30:21,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:30:21,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:30:22,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:22,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:30:22,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:30:22,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:21" (1/1) ... [2021-11-07 01:30:22,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35cb6a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22, skipping insertion in model container [2021-11-07 01:30:22,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:30:21" (1/1) ... [2021-11-07 01:30:22,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:30:22,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:30:22,260 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/sv-benchmarks/c/recursive/McCarthy91-2.c[749,762] [2021-11-07 01:30:22,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:22,281 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:30:22,298 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/sv-benchmarks/c/recursive/McCarthy91-2.c[749,762] [2021-11-07 01:30:22,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:30:22,312 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:30:22,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22 WrapperNode [2021-11-07 01:30:22,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:30:22,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:22,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:30:22,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:30:22,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:30:22,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:30:22,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:30:22,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:30:22,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:30:22,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:30:22,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:30:22,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:30:22,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (1/1) ... [2021-11-07 01:30:22,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:30:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:22,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:30:22,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:30:22,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:30:22,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:30:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:30:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:30:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2021-11-07 01:30:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2021-11-07 01:30:22,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:30:22,768 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:30:22,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:22 BoogieIcfgContainer [2021-11-07 01:30:22,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:30:22,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:30:22,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:30:22,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:30:22,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:30:21" (1/3) ... [2021-11-07 01:30:22,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a6cbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:22, skipping insertion in model container [2021-11-07 01:30:22,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:30:22" (2/3) ... [2021-11-07 01:30:22,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a6cbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:30:22, skipping insertion in model container [2021-11-07 01:30:22,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:22" (3/3) ... [2021-11-07 01:30:22,779 INFO L111 eAbstractionObserver]: Analyzing ICFG McCarthy91-2.c [2021-11-07 01:30:22,784 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:30:22,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:30:22,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:30:22,836 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, mAutomataTypeConcurrency=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 [2021-11-07 01:30:22,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:30:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 01:30:22,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:30:22,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:22,861 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:22,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:22,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2045921670, now seen corresponding path program 1 times [2021-11-07 01:30:22,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:22,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049613584] [2021-11-07 01:30:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:22,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:23,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:23,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049613584] [2021-11-07 01:30:23,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049613584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:23,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:23,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:30:23,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062762510] [2021-11-07 01:30:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:23,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:23,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:23,312 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-11-07 01:30:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:23,457 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-07 01:30:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:30:23,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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 9 [2021-11-07 01:30:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:23,477 INFO L225 Difference]: With dead ends: 26 [2021-11-07 01:30:23,477 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 01:30:23,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:30:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 01:30:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 01:30:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 01:30:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-07 01:30:23,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-11-07 01:30:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:23,526 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-07 01:30:23,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-11-07 01:30:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-07 01:30:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 01:30:23,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:23,528 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:23,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:30:23,529 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1718131711, now seen corresponding path program 1 times [2021-11-07 01:30:23,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:30:23,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553109201] [2021-11-07 01:30:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:23,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:30:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:30:23,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:30:23,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553109201] [2021-11-07 01:30:23,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553109201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:30:23,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193582139] [2021-11-07 01:30:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:23,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:30:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:30:23,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:30:23,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:30:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:30:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:30:24,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:30:24,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193582139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:30:24,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1971819217] [2021-11-07 01:30:24,725 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-07 01:30:24,725 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:30:24,730 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 01:30:24,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:30:24,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 15 [2021-11-07 01:30:24,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507164445] [2021-11-07 01:30:24,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 01:30:24,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:30:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 01:30:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:30:24,737 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 01:30:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:24,918 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-11-07 01:30:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:30:24,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2021-11-07 01:30:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:24,919 INFO L225 Difference]: With dead ends: 16 [2021-11-07 01:30:24,919 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 01:30:24,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:30:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 01:30:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 01:30:24,921 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) [2021-11-07 01:30:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 01:30:24,922 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-11-07 01:30:24,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:24,922 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 01:30:24,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 01:30:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 01:30:24,922 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 01:30:24,924 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:30:24,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:25,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-07 01:30:25,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 01:30:25,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:30:25,174 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 01:30:25,174 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-11-07 01:30:25,175 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 01:30:25,175 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-11-07 01:30:25,175 INFO L860 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2021-11-07 01:30:25,175 INFO L857 garLoopResultBuilder]: For program point L28-1(line 28) no Hoare annotation was computed. [2021-11-07 01:30:25,175 INFO L860 garLoopResultBuilder]: At program point L26(lines 26 34) the Hoare annotation is: true [2021-11-07 01:30:25,176 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2021-11-07 01:30:25,176 INFO L860 garLoopResultBuilder]: At program point f91ENTRY(lines 17 23) the Hoare annotation is: true [2021-11-07 01:30:25,176 INFO L857 garLoopResultBuilder]: For program point f91FINAL(lines 17 23) no Hoare annotation was computed. [2021-11-07 01:30:25,176 INFO L853 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (<= f91_~x 100) (<= f91_~x |f91_#in~x|) (<= |f91_#in~x| f91_~x)) [2021-11-07 01:30:25,176 INFO L857 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-11-07 01:30:25,177 INFO L853 garLoopResultBuilder]: At program point L21-2(line 21) the Hoare annotation is: (and (<= |f91_#t~ret7| 101) (<= f91_~x 100) (<= f91_~x |f91_#in~x|) (<= |f91_#in~x| f91_~x)) [2021-11-07 01:30:25,177 INFO L857 garLoopResultBuilder]: For program point f91EXIT(lines 17 23) no Hoare annotation was computed. [2021-11-07 01:30:25,177 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 22) no Hoare annotation was computed. [2021-11-07 01:30:25,177 INFO L857 garLoopResultBuilder]: For program point L21-3(line 21) no Hoare annotation was computed. [2021-11-07 01:30:25,180 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-07 01:30:25,181 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:30:25,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:30:25 BoogieIcfgContainer [2021-11-07 01:30:25,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:30:25,188 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:30:25,188 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:30:25,189 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:30:25,189 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:30:22" (3/4) ... [2021-11-07 01:30:25,192 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 01:30:25,197 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f91 [2021-11-07 01:30:25,201 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-07 01:30:25,201 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 01:30:25,202 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:30:25,202 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 01:30:25,234 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:30:25,234 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:30:25,236 INFO L168 Benchmark]: Toolchain (without parser) took 3237.96 ms. Allocated memory was 92.3 MB in the beginning and 130.0 MB in the end (delta: 37.7 MB). Free memory was 57.9 MB in the beginning and 72.2 MB in the end (delta: -14.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:25,236 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory was 61.4 MB in the beginning and 61.4 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:30:25,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.69 ms. Allocated memory is still 92.3 MB. Free memory was 57.7 MB in the beginning and 68.4 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:25,237 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.78 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:25,238 INFO L168 Benchmark]: Boogie Preprocessor took 39.45 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 66.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:30:25,238 INFO L168 Benchmark]: RCFGBuilder took 376.36 ms. Allocated memory is still 92.3 MB. Free memory was 66.1 MB in the beginning and 56.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:25,239 INFO L168 Benchmark]: TraceAbstraction took 2415.89 ms. Allocated memory was 92.3 MB in the beginning and 130.0 MB in the end (delta: 37.7 MB). Free memory was 55.8 MB in the beginning and 74.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:25,239 INFO L168 Benchmark]: Witness Printer took 46.03 ms. Allocated memory is still 130.0 MB. Free memory was 74.3 MB in the beginning and 72.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:30:25,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory was 61.4 MB in the beginning and 61.4 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.69 ms. Allocated memory is still 92.3 MB. Free memory was 57.7 MB in the beginning and 68.4 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.78 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.45 ms. Allocated memory is still 92.3 MB. Free memory was 67.2 MB in the beginning and 66.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 376.36 ms. Allocated memory is still 92.3 MB. Free memory was 66.1 MB in the beginning and 56.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2415.89 ms. Allocated memory was 92.3 MB in the beginning and 130.0 MB in the end (delta: 37.7 MB). Free memory was 55.8 MB in the beginning and 74.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.1 GB. * Witness Printer took 46.03 ms. Allocated memory is still 130.0 MB. Free memory was 74.3 MB in the beginning and 72.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 32]: 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, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 2, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 20 SDslu, 55 SDs, 0 SdLazy, 170 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 26 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 334 SizeOfPredicates, 5 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 25/36 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 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-07 01:30:25,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee35cc14-2a82-4c85-a91b-808c3c5fde42/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE