./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF --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 ceea5216a7b51ee21eab36f0e9b129c25f18193871fb4ca0aa52ef8740fc0ce8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:24:02,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:24:02,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:24:02,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:24:02,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:24:02,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:24:02,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:24:02,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:24:02,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:24:02,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:24:02,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:24:02,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:24:02,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:24:02,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:24:02,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:24:02,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:24:02,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:24:02,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:24:02,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:24:02,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:24:02,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:24:02,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:24:02,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:24:02,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:24:02,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:24:02,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:24:02,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:24:02,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:24:02,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:24:02,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:24:02,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:24:02,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:24:02,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:24:02,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:24:02,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:24:02,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:24:02,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:24:02,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:24:02,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:24:02,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:24:02,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:24:02,708 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:24:02,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:24:02,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:24:02,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:24:02,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:24:02,751 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:24:02,751 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:24:02,751 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:24:02,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:24:02,758 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:24:02,759 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:24:02,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:24:02,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:24:02,760 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:24:02,761 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:24:02,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:24:02,761 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:24:02,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:24:02,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:24:02,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:24:02,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:24:02,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:24:02,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:24:02,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:24:02,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:24:02,765 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:24:02,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:24:02,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:24:02,766 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:24:02,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:24:02,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:24:02,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:24:02,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:24:02,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:24:02,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:24:02,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:24:02,770 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:24:02,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:24:02,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:24:02,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:24:02,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:24:02,771 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_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceea5216a7b51ee21eab36f0e9b129c25f18193871fb4ca0aa52ef8740fc0ce8 [2021-11-12 23:24:03,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:24:03,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:24:03,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:24:03,130 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:24:03,131 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:24:03,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/recursive/gcd01-1.c [2021-11-12 23:24:03,210 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/data/bdcabe0d2/96696e48416840b298a56d43a3af9a7a/FLAG97e6c57e3 [2021-11-12 23:24:03,712 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:24:03,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/sv-benchmarks/c/recursive/gcd01-1.c [2021-11-12 23:24:03,719 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/data/bdcabe0d2/96696e48416840b298a56d43a3af9a7a/FLAG97e6c57e3 [2021-11-12 23:24:04,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/data/bdcabe0d2/96696e48416840b298a56d43a3af9a7a [2021-11-12 23:24:04,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:24:04,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:24:04,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:04,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:24:04,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:24:04,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbcdba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04, skipping insertion in model container [2021-11-12 23:24:04,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:24:04,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:24:04,338 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_ccacba9d-0432-4239-abaa-7d8329637139/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-11-12 23:24:04,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:04,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:24:04,366 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_ccacba9d-0432-4239-abaa-7d8329637139/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-11-12 23:24:04,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:04,380 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:24:04,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04 WrapperNode [2021-11-12 23:24:04,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:04,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:04,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:24:04,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:24:04,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:04,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:24:04,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:24:04,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:24:04,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:24:04,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:24:04,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:24:04,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:24:04,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (1/1) ... [2021-11-12 23:24:04,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:24:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:04,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:24:04,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:24:04,533 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-11-12 23:24:04,535 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-11-12 23:24:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:24:04,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:24:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:24:04,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:24:04,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:24:04,847 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:24:04,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:04 BoogieIcfgContainer [2021-11-12 23:24:04,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:24:04,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:24:04,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:24:04,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:24:04,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:24:04" (1/3) ... [2021-11-12 23:24:04,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24835c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:04, skipping insertion in model container [2021-11-12 23:24:04,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:04" (2/3) ... [2021-11-12 23:24:04,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24835c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:04, skipping insertion in model container [2021-11-12 23:24:04,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:04" (3/3) ... [2021-11-12 23:24:04,860 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2021-11-12 23:24:04,865 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:24:04,865 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:24:04,912 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:24:04,919 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 [2021-11-12 23:24:04,920 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:24:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-11-12 23:24:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:24:04,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:04,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:04,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -672472283, now seen corresponding path program 1 times [2021-11-12 23:24:04,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:04,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187567286] [2021-11-12 23:24:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:04,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:05,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:05,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187567286] [2021-11-12 23:24:05,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187567286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:05,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:05,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:24:05,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711058569] [2021-11-12 23:24:05,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:05,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:05,266 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-11-12 23:24:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:05,386 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-11-12 23:24:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 11 [2021-11-12 23:24:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:05,397 INFO L225 Difference]: With dead ends: 32 [2021-11-12 23:24:05,397 INFO L226 Difference]: Without dead ends: 20 [2021-11-12 23:24:05,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:05,404 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:05,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 2.96ms Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 66.79ms Time] [2021-11-12 23:24:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-12 23:24:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-12 23:24:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-11-12 23:24:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-12 23:24:05,479 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-11-12 23:24:05,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:05,479 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-12 23:24:05,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-11-12 23:24:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-12 23:24:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:24:05,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:05,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:05,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:24:05,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1200358745, now seen corresponding path program 1 times [2021-11-12 23:24:05,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:05,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21687373] [2021-11-12 23:24:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:05,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:05,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:05,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21687373] [2021-11-12 23:24:05,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21687373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:05,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:05,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:24:05,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326359767] [2021-11-12 23:24:05,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:05,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:05,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:05,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:05,625 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-12 23:24:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:05,678 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-12 23:24:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2021-11-12 23:24:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:05,680 INFO L225 Difference]: With dead ends: 26 [2021-11-12 23:24:05,680 INFO L226 Difference]: Without dead ends: 22 [2021-11-12 23:24:05,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:05,682 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:05,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 81 Invalid, 31 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 34.80ms Time] [2021-11-12 23:24:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-12 23:24:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-12 23:24:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-11-12 23:24:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-12 23:24:05,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2021-11-12 23:24:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:05,692 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-12 23:24:05,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-12 23:24:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-12 23:24:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 23:24:05,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:05,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:05,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:24:05,695 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:05,696 INFO L85 PathProgramCache]: Analyzing trace with hash -229059489, now seen corresponding path program 1 times [2021-11-12 23:24:05,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:05,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275682122] [2021-11-12 23:24:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:05,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:24:05,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:05,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275682122] [2021-11-12 23:24:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275682122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:05,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:05,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:24:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66746438] [2021-11-12 23:24:05,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:05,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:05,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:05,870 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:24:06,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,013 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-11-12 23:24:06,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:24:06,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-12 23:24:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,015 INFO L225 Difference]: With dead ends: 32 [2021-11-12 23:24:06,015 INFO L226 Difference]: Without dead ends: 24 [2021-11-12 23:24:06,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:06,017 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 64 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 93.19ms Time] [2021-11-12 23:24:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-12 23:24:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-12 23:24:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:24:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-12 23:24:06,030 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2021-11-12 23:24:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,031 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-12 23:24:06,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:24:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-12 23:24:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 23:24:06,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:24:06,037 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1574819235, now seen corresponding path program 1 times [2021-11-12 23:24:06,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:06,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504390414] [2021-11-12 23:24:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:06,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 23:24:06,209 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:06,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504390414] [2021-11-12 23:24:06,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504390414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:06,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:06,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 23:24:06,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969172911] [2021-11-12 23:24:06,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:06,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:06,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:06,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:06,212 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:24:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,352 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-12 23:24:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:06,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-12 23:24:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,358 INFO L225 Difference]: With dead ends: 32 [2021-11-12 23:24:06,359 INFO L226 Difference]: Without dead ends: 22 [2021-11-12 23:24:06,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:06,368 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.01ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 48 Invalid, 67 Unknown, 0 Unchecked, 9.01ms Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 65.63ms Time] [2021-11-12 23:24:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-12 23:24:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-12 23:24:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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) [2021-11-12 23:24:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-12 23:24:06,381 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 19 [2021-11-12 23:24:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,382 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-12 23:24:06,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 23:24:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-12 23:24:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:24:06,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:24:06,384 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1175015767, now seen corresponding path program 1 times [2021-11-12 23:24:06,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:06,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268618109] [2021-11-12 23:24:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:06,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:24:06,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:06,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268618109] [2021-11-12 23:24:06,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268618109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:06,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:06,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 23:24:06,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329836279] [2021-11-12 23:24:06,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:06,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:06,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:06,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:06,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:06,483 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:24:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,524 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-12 23:24:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:06,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-12 23:24:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,526 INFO L225 Difference]: With dead ends: 27 [2021-11-12 23:24:06,526 INFO L226 Difference]: Without dead ends: 23 [2021-11-12 23:24:06,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:06,527 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 40 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 23.26ms Time] [2021-11-12 23:24:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-12 23:24:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-11-12 23:24:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 23:24:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-12 23:24:06,534 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2021-11-12 23:24:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,534 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-12 23:24:06,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:24:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-12 23:24:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-12 23:24:06,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:24:06,536 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash 63835465, now seen corresponding path program 1 times [2021-11-12 23:24:06,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:06,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033067311] [2021-11-12 23:24:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:06,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:24:06,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:06,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033067311] [2021-11-12 23:24:06,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033067311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:06,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:06,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-12 23:24:06,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328382393] [2021-11-12 23:24:06,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:06,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:24:06,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:24:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:24:06,654 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:24:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,705 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-11-12 23:24:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-12 23:24:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,710 INFO L225 Difference]: With dead ends: 30 [2021-11-12 23:24:06,710 INFO L226 Difference]: Without dead ends: 26 [2021-11-12 23:24:06,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:24:06,715 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 40 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 28.01ms Time] [2021-11-12 23:24:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-12 23:24:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-12 23:24:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-12 23:24:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-12 23:24:06,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2021-11-12 23:24:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,734 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-12 23:24:06,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 23:24:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-12 23:24:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 23:24:06,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,735 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:24:06,736 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,738 INFO L85 PathProgramCache]: Analyzing trace with hash 915558905, now seen corresponding path program 1 times [2021-11-12 23:24:06,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:24:06,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752027283] [2021-11-12 23:24:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:06,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:24:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:24:06,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:24:06,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752027283] [2021-11-12 23:24:06,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752027283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:06,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:06,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-12 23:24:06,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973872042] [2021-11-12 23:24:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:06,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:24:06,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:24:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:24:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:06,858 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:24:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,914 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-12 23:24:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:24:06,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-12 23:24:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,916 INFO L225 Difference]: With dead ends: 26 [2021-11-12 23:24:06,916 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:24:06,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:24:06,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 49 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 28.33ms Time] [2021-11-12 23:24:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:24:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:24:06,925 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) [2021-11-12 23:24:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:24:06,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-11-12 23:24:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,926 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:24:06,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-12 23:24:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:24:06,944 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:24:06,947 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:24:06,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:24:06,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:24:07,002 INFO L858 garLoopResultBuilder]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2021-11-12 23:24:07,003 INFO L854 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 1 gcd_~y1) (<= (+ gcd_~y1 1) gcd_~y2) (<= |gcd_#in~y2| gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2021-11-12 23:24:07,003 INFO L858 garLoopResultBuilder]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2021-11-12 23:24:07,003 INFO L858 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-11-12 23:24:07,003 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= |gcd_#in~y2| gcd_~y2) (<= |gcd_#in~y1| gcd_~y1) (<= (+ gcd_~y2 1) gcd_~y1)) [2021-11-12 23:24:07,003 INFO L858 garLoopResultBuilder]: For program point L24(lines 24 26) no Hoare annotation was computed. [2021-11-12 23:24:07,004 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-11-12 23:24:07,004 INFO L861 garLoopResultBuilder]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2021-11-12 23:24:07,004 INFO L858 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2021-11-12 23:24:07,004 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-12 23:24:07,004 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 23:24:07,005 INFO L858 garLoopResultBuilder]: For program point L32(lines 32 34) no Hoare annotation was computed. [2021-11-12 23:24:07,005 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 23:24:07,005 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-11-12 23:24:07,005 INFO L861 garLoopResultBuilder]: At program point L43(lines 30 45) the Hoare annotation is: true [2021-11-12 23:24:07,005 INFO L858 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2021-11-12 23:24:07,006 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 44) no Hoare annotation was computed. [2021-11-12 23:24:07,006 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~m~0#1|) (<= 1 |ULTIMATE.start_main_~n~0#1|)) [2021-11-12 23:24:07,006 INFO L858 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-11-12 23:24:07,006 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-11-12 23:24:07,010 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:07,011 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:24:07,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:24:07 BoogieIcfgContainer [2021-11-12 23:24:07,019 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:24:07,020 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:24:07,020 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:24:07,020 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:24:07,021 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:04" (3/4) ... [2021-11-12 23:24:07,024 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 23:24:07,030 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2021-11-12 23:24:07,034 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-12 23:24:07,035 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-12 23:24:07,035 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-12 23:24:07,035 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 23:24:07,066 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:24:07,066 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:24:07,067 INFO L158 Benchmark]: Toolchain (without parser) took 2954.37ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 54.3MB in the beginning and 83.0MB in the end (delta: -28.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:24:07,067 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory is still 70.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:24:07,067 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.41ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 54.1MB in the beginning and 88.8MB in the end (delta: -34.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:24:07,068 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.86ms. Allocated memory is still 113.2MB. Free memory was 88.8MB in the beginning and 87.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:24:07,068 INFO L158 Benchmark]: Boogie Preprocessor took 28.03ms. Allocated memory is still 113.2MB. Free memory was 87.3MB in the beginning and 86.4MB in the end (delta: 910.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:24:07,069 INFO L158 Benchmark]: RCFGBuilder took 405.23ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 75.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:24:07,069 INFO L158 Benchmark]: TraceAbstraction took 2167.71ms. Allocated memory is still 113.2MB. Free memory was 75.6MB in the beginning and 85.1MB in the end (delta: -9.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:24:07,070 INFO L158 Benchmark]: Witness Printer took 46.12ms. Allocated memory is still 113.2MB. Free memory was 85.1MB in the beginning and 83.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:24:07,072 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 90.2MB. Free memory is still 70.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.41ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 54.1MB in the beginning and 88.8MB in the end (delta: -34.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.86ms. Allocated memory is still 113.2MB. Free memory was 88.8MB in the beginning and 87.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.03ms. Allocated memory is still 113.2MB. Free memory was 87.3MB in the beginning and 86.4MB in the end (delta: 910.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 405.23ms. Allocated memory is still 113.2MB. Free memory was 86.4MB in the beginning and 75.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2167.71ms. Allocated memory is still 113.2MB. Free memory was 75.6MB in the beginning and 85.1MB in the end (delta: -9.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 46.12ms. Allocated memory is still 113.2MB. Free memory was 85.1MB in the beginning and 83.0MB in the end (delta: 2.1MB). 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, 0.0s 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: 41]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 340.01ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 90 mSDsluCounter, 426 SdHoareTripleChecker+Invalid, 272.04ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 356 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 335 IncrementalHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 100 mSDtfsCounter, 335 mSolverCounterSat, 20.50ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 14 NumberOfFragments, 39 HoareAnnotationTreeSize, 11 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 277 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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: 30]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-12 23:24:07,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccacba9d-0432-4239-abaa-7d8329637139/bin/utaipan-vmNK8stdcF/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