./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH --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-9ad7fb2 [2021-11-03 05:16:57,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:16:57,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:16:57,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:16:57,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:16:57,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:16:57,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:16:57,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:16:57,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:16:57,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:16:57,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:16:57,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:16:57,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:16:57,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:16:57,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:16:57,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:16:57,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:16:57,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:16:57,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:16:57,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:16:57,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:16:57,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:16:57,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:16:57,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:16:57,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:16:57,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:16:57,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:16:57,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:16:57,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:16:57,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:16:57,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:16:57,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:16:57,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:16:57,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:16:57,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:16:57,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:16:57,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:16:57,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:16:57,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:16:57,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:16:57,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:16:57,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:16:57,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:16:57,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:16:57,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:16:57,555 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:16:57,555 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:16:57,555 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:16:57,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:16:57,556 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:16:57,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:16:57,556 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:16:57,563 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:16:57,564 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:16:57,564 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:16:57,564 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:16:57,564 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:16:57,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:16:57,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:16:57,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:16:57,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:16:57,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:16:57,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:16:57,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:16:57,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:16:57,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:16:57,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:16:57,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:16:57,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:16:57,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:16:57,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:16:57,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:16:57,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:16:57,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:16:57,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:16:57,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:16:57,570 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:16:57,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:16:57,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:16:57,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:16:57,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:16:57,571 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_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceea5216a7b51ee21eab36f0e9b129c25f18193871fb4ca0aa52ef8740fc0ce8 [2021-11-03 05:16:57,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:16:57,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:16:57,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:16:57,861 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:16:57,862 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:16:57,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/recursive/gcd01-1.c [2021-11-03 05:16:57,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/data/70a29605d/47b20bafdd68470084b8c356bd998081/FLAG51ac23a48 [2021-11-03 05:16:58,314 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:16:58,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/sv-benchmarks/c/recursive/gcd01-1.c [2021-11-03 05:16:58,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/data/70a29605d/47b20bafdd68470084b8c356bd998081/FLAG51ac23a48 [2021-11-03 05:16:58,705 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/data/70a29605d/47b20bafdd68470084b8c356bd998081 [2021-11-03 05:16:58,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:16:58,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:16:58,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:16:58,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:16:58,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:16:58,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:58,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6037e81b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58, skipping insertion in model container [2021-11-03 05:16:58,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:58,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:16:58,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:16:58,910 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_d3025167-87d2-4614-addf-c7cc39b0fe3e/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-11-03 05:16:58,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:16:58,939 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:16:58,967 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_d3025167-87d2-4614-addf-c7cc39b0fe3e/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2021-11-03 05:16:58,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:16:58,981 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:16:58,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58 WrapperNode [2021-11-03 05:16:58,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:16:58,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:16:58,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:16:58,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:16:58,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:58,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:16:59,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:16:59,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:16:59,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:16:59,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:16:59,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:16:59,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:16:59,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:16:59,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (1/1) ... [2021-11-03 05:16:59,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:16:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:16:59,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:16:59,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:16:59,110 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-11-03 05:16:59,110 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-11-03 05:16:59,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:16:59,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:16:59,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:16:59,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:16:59,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:16:59,310 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 05:16:59,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:16:59 BoogieIcfgContainer [2021-11-03 05:16:59,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:16:59,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:16:59,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:16:59,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:16:59,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:16:58" (1/3) ... [2021-11-03 05:16:59,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30532004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:16:59, skipping insertion in model container [2021-11-03 05:16:59,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:16:58" (2/3) ... [2021-11-03 05:16:59,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30532004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:16:59, skipping insertion in model container [2021-11-03 05:16:59,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:16:59" (3/3) ... [2021-11-03 05:16:59,322 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2021-11-03 05:16:59,327 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:16:59,327 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:16:59,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:16:59,379 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 [2021-11-03 05:16:59,379 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:16:59,395 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) [2021-11-03 05:16:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:16:59,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:59,401 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:59,402 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash -672472283, now seen corresponding path program 1 times [2021-11-03 05:16:59,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:59,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390553302] [2021-11-03 05:16:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:59,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:59,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:59,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390553302] [2021-11-03 05:16:59,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390553302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:59,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:59,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 05:16:59,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365070069] [2021-11-03 05:16:59,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:16:59,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:16:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:16:59,666 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) [2021-11-03 05:16:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:16:59,800 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-11-03 05:16:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:16:59,802 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 [2021-11-03 05:16:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:16:59,811 INFO L225 Difference]: With dead ends: 32 [2021-11-03 05:16:59,811 INFO L226 Difference]: Without dead ends: 20 [2021-11-03 05:16:59,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:16:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-03 05:16:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-03 05:16:59,873 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) [2021-11-03 05:16:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-03 05:16:59,877 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-11-03 05:16:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:16:59,877 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-03 05:16:59,878 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) [2021-11-03 05:16:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-03 05:16:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:16:59,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:16:59,880 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:16:59,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:16:59,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:16:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:16:59,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1200358745, now seen corresponding path program 1 times [2021-11-03 05:16:59,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:16:59,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689893075] [2021-11-03 05:16:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:16:59,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:16:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:16:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:59,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:16:59,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689893075] [2021-11-03 05:16:59,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689893075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:16:59,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:16:59,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 05:16:59,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907229412] [2021-11-03 05:16:59,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:16:59,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:16:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:16:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:16:59,990 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) [2021-11-03 05:17:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:00,062 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-03 05:17:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:17:00,068 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 [2021-11-03 05:17:00,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:00,070 INFO L225 Difference]: With dead ends: 26 [2021-11-03 05:17:00,070 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 05:17:00,071 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 [2021-11-03 05:17:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 05:17:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-03 05:17:00,076 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) [2021-11-03 05:17:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-03 05:17:00,077 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2021-11-03 05:17:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:00,078 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-03 05:17:00,078 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) [2021-11-03 05:17:00,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-03 05:17:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 05:17:00,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:00,080 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:00,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:17:00,081 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash -229059489, now seen corresponding path program 1 times [2021-11-03 05:17:00,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:00,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977460779] [2021-11-03 05:17:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:00,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:17:00,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:00,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977460779] [2021-11-03 05:17:00,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977460779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:00,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:00,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 05:17:00,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990121392] [2021-11-03 05:17:00,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:17:00,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:17:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:17:00,286 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) [2021-11-03 05:17:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:00,410 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-11-03 05:17:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:17:00,411 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 [2021-11-03 05:17:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:00,414 INFO L225 Difference]: With dead ends: 32 [2021-11-03 05:17:00,415 INFO L226 Difference]: Without dead ends: 24 [2021-11-03 05:17:00,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:17:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-03 05:17:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-03 05:17:00,434 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) [2021-11-03 05:17:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-03 05:17:00,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2021-11-03 05:17:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:00,437 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-03 05:17:00,438 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) [2021-11-03 05:17:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-03 05:17:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 05:17:00,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:00,442 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:00,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:17:00,444 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1574819235, now seen corresponding path program 1 times [2021-11-03 05:17:00,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:00,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194618522] [2021-11-03 05:17:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:00,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 05:17:00,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:00,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194618522] [2021-11-03 05:17:00,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194618522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:00,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:00,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 05:17:00,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882520855] [2021-11-03 05:17:00,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:17:00,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:17:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:17:00,572 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) [2021-11-03 05:17:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:00,664 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-03 05:17:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:17:00,665 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 [2021-11-03 05:17:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:00,666 INFO L225 Difference]: With dead ends: 32 [2021-11-03 05:17:00,666 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 05:17:00,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:17:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 05:17:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-03 05:17:00,672 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) [2021-11-03 05:17:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-03 05:17:00,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 19 [2021-11-03 05:17:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:00,673 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-03 05:17:00,674 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) [2021-11-03 05:17:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-03 05:17:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:17:00,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:00,675 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:00,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:17:00,676 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1175015767, now seen corresponding path program 1 times [2021-11-03 05:17:00,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:00,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675392366] [2021-11-03 05:17:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:00,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:17:00,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:00,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675392366] [2021-11-03 05:17:00,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675392366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:00,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:00,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 05:17:00,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846007374] [2021-11-03 05:17:00,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:17:00,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:17:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:17:00,750 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) [2021-11-03 05:17:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:00,789 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-11-03 05:17:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:17:00,790 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 [2021-11-03 05:17:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:00,791 INFO L225 Difference]: With dead ends: 27 [2021-11-03 05:17:00,791 INFO L226 Difference]: Without dead ends: 23 [2021-11-03 05:17:00,792 INFO L786 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 [2021-11-03 05:17:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-03 05:17:00,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-11-03 05:17:00,796 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) [2021-11-03 05:17:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-03 05:17:00,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2021-11-03 05:17:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:00,797 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-03 05:17:00,797 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) [2021-11-03 05:17:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-03 05:17:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:17:00,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:00,799 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:00,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:17:00,799 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash 63835465, now seen corresponding path program 1 times [2021-11-03 05:17:00,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:00,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720864033] [2021-11-03 05:17:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:00,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:17:00,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:00,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720864033] [2021-11-03 05:17:00,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720864033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:00,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:00,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 05:17:00,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208351050] [2021-11-03 05:17:00,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:17:00,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:17:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:17:00,867 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) [2021-11-03 05:17:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:00,905 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-11-03 05:17:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:17:00,906 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 [2021-11-03 05:17:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:00,907 INFO L225 Difference]: With dead ends: 30 [2021-11-03 05:17:00,907 INFO L226 Difference]: Without dead ends: 26 [2021-11-03 05:17:00,907 INFO L786 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 [2021-11-03 05:17:00,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-03 05:17:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-03 05:17:00,912 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) [2021-11-03 05:17:00,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-03 05:17:00,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2021-11-03 05:17:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:00,914 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-03 05:17:00,914 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) [2021-11-03 05:17:00,914 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-03 05:17:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-03 05:17:00,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:17:00,915 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:00,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:17:00,916 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:17:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:17:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash 915558905, now seen corresponding path program 1 times [2021-11-03 05:17:00,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:17:00,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593263663] [2021-11-03 05:17:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:17:00,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:17:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:17:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:17:00,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:17:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593263663] [2021-11-03 05:17:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593263663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:17:00,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:17:00,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 05:17:00,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798335267] [2021-11-03 05:17:00,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:17:00,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:17:00,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:17:00,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:17:00,996 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) [2021-11-03 05:17:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:17:01,042 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-03 05:17:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:17:01,043 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 [2021-11-03 05:17:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:17:01,043 INFO L225 Difference]: With dead ends: 26 [2021-11-03 05:17:01,043 INFO L226 Difference]: Without dead ends: 0 [2021-11-03 05:17:01,044 INFO L786 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 [2021-11-03 05:17:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-03 05:17:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-03 05:17:01,045 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) [2021-11-03 05:17:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-03 05:17:01,045 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-11-03 05:17:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:17:01,045 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-03 05:17:01,046 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) [2021-11-03 05:17:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-03 05:17:01,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-03 05:17:01,048 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:17:01,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:17:01,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-03 05:17:01,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:17:01,104 INFO L857 garLoopResultBuilder]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2021-11-03 05:17:01,105 INFO L853 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)) [2021-11-03 05:17:01,105 INFO L857 garLoopResultBuilder]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2021-11-03 05:17:01,105 INFO L857 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-11-03 05:17:01,105 INFO L853 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)) [2021-11-03 05:17:01,105 INFO L857 garLoopResultBuilder]: For program point L24(lines 24 26) no Hoare annotation was computed. [2021-11-03 05:17:01,106 INFO L857 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-11-03 05:17:01,106 INFO L860 garLoopResultBuilder]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2021-11-03 05:17:01,106 INFO L857 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2021-11-03 05:17:01,106 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-03 05:17:01,106 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-03 05:17:01,106 INFO L857 garLoopResultBuilder]: For program point L32(lines 32 34) no Hoare annotation was computed. [2021-11-03 05:17:01,106 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-03 05:17:01,107 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-11-03 05:17:01,107 INFO L860 garLoopResultBuilder]: At program point L43(lines 30 45) the Hoare annotation is: true [2021-11-03 05:17:01,107 INFO L857 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2021-11-03 05:17:01,107 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 44) no Hoare annotation was computed. [2021-11-03 05:17:01,107 INFO L853 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 ULTIMATE.start_main_~m~0) (<= 1 ULTIMATE.start_main_~n~0)) [2021-11-03 05:17:01,107 INFO L857 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-11-03 05:17:01,108 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-11-03 05:17:01,111 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:17:01,112 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:17:01,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:17:01 BoogieIcfgContainer [2021-11-03 05:17:01,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:17:01,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:17:01,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:17:01,120 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:17:01,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:16:59" (3/4) ... [2021-11-03 05:17:01,123 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-03 05:17:01,129 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2021-11-03 05:17:01,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-03 05:17:01,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-03 05:17:01,134 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-03 05:17:01,135 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-03 05:17:01,169 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 05:17:01,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:17:01,170 INFO L168 Benchmark]: Toolchain (without parser) took 2460.92 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 67.0 MB in the beginning and 55.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:01,171 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory was 83.1 MB in the beginning and 83.0 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:17:01,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.04 ms. Allocated memory is still 109.1 MB. Free memory was 66.8 MB in the beginning and 83.4 MB in the end (delta: -16.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:01,172 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.34 ms. Allocated memory is still 109.1 MB. Free memory was 83.4 MB in the beginning and 81.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:01,172 INFO L168 Benchmark]: Boogie Preprocessor took 19.60 ms. Allocated memory is still 109.1 MB. Free memory was 81.8 MB in the beginning and 81.1 MB in the end (delta: 694.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:17:01,173 INFO L168 Benchmark]: RCFGBuilder took 280.96 ms. Allocated memory is still 109.1 MB. Free memory was 81.1 MB in the beginning and 70.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:01,173 INFO L168 Benchmark]: TraceAbstraction took 1804.52 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 69.6 MB in the beginning and 58.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:01,174 INFO L168 Benchmark]: Witness Printer took 49.16 ms. Allocated memory is still 132.1 MB. Free memory was 58.2 MB in the beginning and 55.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:01,176 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory was 83.1 MB in the beginning and 83.0 MB in the end (delta: 55.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.04 ms. Allocated memory is still 109.1 MB. Free memory was 66.8 MB in the beginning and 83.4 MB in the end (delta: -16.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.34 ms. Allocated memory is still 109.1 MB. Free memory was 83.4 MB in the beginning and 81.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.60 ms. Allocated memory is still 109.1 MB. Free memory was 81.8 MB in the beginning and 81.1 MB in the end (delta: 694.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 280.96 ms. Allocated memory is still 109.1 MB. Free memory was 81.1 MB in the beginning and 70.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1804.52 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 69.6 MB in the beginning and 58.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. * Witness Printer took 49.16 ms. Allocated memory is still 132.1 MB. Free memory was 58.2 MB in the beginning and 55.3 MB in the end (delta: 2.9 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: 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: 1.7s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 90 SDslu, 356 SDs, 0 SdLazy, 295 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 14 NumberOfFragments, 39 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s 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! [2021-11-03 05:17:01,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3025167-87d2-4614-addf-c7cc39b0fe3e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE