./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl --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 a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:20,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:20,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:20,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:20,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:20,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:20,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:20,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:20,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:20,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:20,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:20,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:20,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:20,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:20,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:20,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:20,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:20,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:20,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:20,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:20,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:20,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:20,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:20,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:20,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:20,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:20,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:20,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:20,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:20,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:20,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:20,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:20,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:20,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:20,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:20,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:20,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:20,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:20,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:20,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:20,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:20,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:20,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:20,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:20,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:20,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:20,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:20,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:20,401 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:20,401 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:20,401 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:20,401 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:20,402 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:20,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:20,403 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:20,403 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:20,404 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:20,404 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:20,404 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:20,404 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:20,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:20,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:20,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:20,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:20,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:20,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:20,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:20,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:20,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:20,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:20,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:20,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:20,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:20,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:20,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:20,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:20,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:20,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:20,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:20,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:20,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:20,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:20,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:20,411 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 [2021-11-23 16:45:20,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:20,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:20,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:20,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:20,735 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:20,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2021-11-23 16:45:20,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/8a50ef5c1/190181b9953442639f953bdd88e53d9c/FLAG72129f852 [2021-11-23 16:45:21,374 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:21,378 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2021-11-23 16:45:21,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/8a50ef5c1/190181b9953442639f953bdd88e53d9c/FLAG72129f852 [2021-11-23 16:45:21,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/8a50ef5c1/190181b9953442639f953bdd88e53d9c [2021-11-23 16:45:21,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:21,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:21,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:21,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:21,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:21,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:21" (1/1) ... [2021-11-23 16:45:21,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75378d42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:21, skipping insertion in model container [2021-11-23 16:45:21,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:21" (1/1) ... [2021-11-23 16:45:21,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:21,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:21,962 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2021-11-23 16:45:21,990 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2021-11-23 16:45:21,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:22,001 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:22,014 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2021-11-23 16:45:22,027 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2021-11-23 16:45:22,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:22,040 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:22,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22 WrapperNode [2021-11-23 16:45:22,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:22,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:22,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:22,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:22,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,106 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-11-23 16:45:22,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:22,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:22,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:22,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:22,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:22,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:22,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:22,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:22,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:22" (1/1) ... [2021-11-23 16:45:22,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:22,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:22,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:22,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:22,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-23 16:45:22,232 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-23 16:45:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-23 16:45:22,233 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-23 16:45:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:22,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:22,319 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:22,321 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:22,603 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:22,622 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:45:22,627 INFO L158 Benchmark]: Toolchain (without parser) took 899.45ms. Allocated memory is still 132.1MB. Free memory was 98.0MB in the beginning and 89.6MB in the end (delta: 8.5MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-23 16:45:22,627 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory was 42.2MB in the beginning and 42.2MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:22,628 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.53ms. Allocated memory is still 132.1MB. Free memory was 97.7MB in the beginning and 104.2MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:45:22,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.22ms. Allocated memory is still 132.1MB. Free memory was 104.2MB in the beginning and 102.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:45:22,630 INFO L158 Benchmark]: Boogie Preprocessor took 42.48ms. Allocated memory is still 132.1MB. Free memory was 102.5MB in the beginning and 101.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:22,631 INFO L158 Benchmark]: RCFGBuilder took 475.02ms. Allocated memory is still 132.1MB. Free memory was 101.4MB in the beginning and 89.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:45:22,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory was 42.2MB in the beginning and 42.2MB in the end (delta: 43.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.53ms. Allocated memory is still 132.1MB. Free memory was 97.7MB in the beginning and 104.2MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.22ms. Allocated memory is still 132.1MB. Free memory was 104.2MB in the beginning and 102.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.48ms. Allocated memory is still 132.1MB. Free memory was 102.5MB in the beginning and 101.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 475.02ms. Allocated memory is still 132.1MB. Free memory was 101.4MB in the beginning and 89.6MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:45:22,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl --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 a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:25,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:25,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:25,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:25,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:25,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:25,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:25,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:25,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:25,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:25,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:25,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:25,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:25,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:25,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:25,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:25,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:25,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:25,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:25,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:25,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:25,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:25,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:25,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:25,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:25,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:25,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:25,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:25,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:25,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:25,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:25,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:25,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:25,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:25,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:25,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:25,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:25,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:25,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:25,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:25,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:25,300 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:25,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:25,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:25,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:25,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:25,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:25,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:25,331 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:25,331 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:25,332 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:25,332 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:25,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:25,333 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:25,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:25,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:25,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:25,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:25,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:25,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:25,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:25,336 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:25,336 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:25,336 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:25,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:25,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:25,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:25,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:25,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:25,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:25,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:25,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:25,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:25,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:25,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:25,340 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:25,340 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:25,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:25,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:25,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:25,359 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 [2021-11-23 16:45:25,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:25,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:25,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:25,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:25,759 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:25,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2021-11-23 16:45:25,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/b0a64fa19/526fe123c4f1446aba4b923944e3a932/FLAGe87c5fd60 [2021-11-23 16:45:26,355 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:26,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2021-11-23 16:45:26,365 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/b0a64fa19/526fe123c4f1446aba4b923944e3a932/FLAGe87c5fd60 [2021-11-23 16:45:26,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/data/b0a64fa19/526fe123c4f1446aba4b923944e3a932 [2021-11-23 16:45:26,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:26,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:26,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:26,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:26,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:26,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:26" (1/1) ... [2021-11-23 16:45:26,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d6d639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:26, skipping insertion in model container [2021-11-23 16:45:26,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:26" (1/1) ... [2021-11-23 16:45:26,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:26,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:26,960 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2021-11-23 16:45:26,992 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2021-11-23 16:45:26,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:27,008 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:27,022 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2021-11-23 16:45:27,037 WARN L230 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_215174e4-6bf5-45f9-a652-b25e0b84ee06/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2021-11-23 16:45:27,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:27,097 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:27,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27 WrapperNode [2021-11-23 16:45:27,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:27,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:27,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:27,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:27,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,142 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-11-23 16:45:27,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:27,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:27,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:27,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:27,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:27,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:27,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:27,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:27,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:27,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:27,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:27,265 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-23 16:45:27,265 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-23 16:45:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-23 16:45:27,266 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-23 16:45:27,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:27,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:27,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:27,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:36,600 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:36,613 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:36,613 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:45:36,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:36 BoogieIcfgContainer [2021-11-23 16:45:36,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:36,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:36,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:36,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:36,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:26" (1/3) ... [2021-11-23 16:45:36,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5842f7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:36, skipping insertion in model container [2021-11-23 16:45:36,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (2/3) ... [2021-11-23 16:45:36,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5842f7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:36, skipping insertion in model container [2021-11-23 16:45:36,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:36" (3/3) ... [2021-11-23 16:45:36,624 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_6.i [2021-11-23 16:45:36,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:36,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 16:45:36,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:36,694 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 [2021-11-23 16:45:36,694 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 16:45:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 16:45:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 16:45:36,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:36,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:36,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:36,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:36,724 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-11-23 16:45:36,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:36,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266657974] [2021-11-23 16:45:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:36,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:36,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:36,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:36,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:45:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:36,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:36,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266657974] [2021-11-23 16:45:36,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266657974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:36,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:36,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:36,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222932343] [2021-11-23 16:45:36,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:36,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:45:36,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:36,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:45:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:45:36,946 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-23 16:45:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:36,979 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-11-23 16:45:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:45:36,981 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) Word has length 11 [2021-11-23 16:45:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:36,989 INFO L225 Difference]: With dead ends: 72 [2021-11-23 16:45:36,989 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 16:45:36,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:45:36,998 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:37,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:45:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 16:45:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 16:45:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 16:45:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-23 16:45:37,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2021-11-23 16:45:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:37,067 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-23 16:45:37,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-23 16:45:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-23 16:45:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 16:45:37,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:37,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:37,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 16:45:37,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,270 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-11-23 16:45:37,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:37,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304029763] [2021-11-23 16:45:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:37,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:37,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:37,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:45:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:37,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:37,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:37,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:37,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:37,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304029763] [2021-11-23 16:45:37,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304029763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:37,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:37,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:37,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765456893] [2021-11-23 16:45:37,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:37,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:37,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:37,510 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 16:45:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:37,589 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-23 16:45:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2021-11-23 16:45:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:37,592 INFO L225 Difference]: With dead ends: 39 [2021-11-23 16:45:37,592 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 16:45:37,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:37,594 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:37,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 16:45:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 16:45:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 16:45:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-23 16:45:37,604 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-11-23 16:45:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:37,604 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-23 16:45:37,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 16:45:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-23 16:45:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:45:37,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:37,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:37,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:37,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,827 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:37,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-11-23 16:45:37,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:37,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86377634] [2021-11-23 16:45:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:37,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:37,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:37,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:45:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:37,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:37,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:38,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:38,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86377634] [2021-11-23 16:45:38,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86377634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929543286] [2021-11-23 16:45:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:38,510 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:38,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:38,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 16:45:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:38,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:38,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:39,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:39,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929543286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:39,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991537463] [2021-11-23 16:45:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:39,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:39,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:39,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 16:45:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:39,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:39,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:40,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991537463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:40,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:40,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 11 [2021-11-23 16:45:40,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069305371] [2021-11-23 16:45:40,182 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:40,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 16:45:40,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 16:45:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:45:40,185 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2021-11-23 16:45:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:40,834 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-23 16:45:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:40,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) Word has length 12 [2021-11-23 16:45:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:40,840 INFO L225 Difference]: With dead ends: 39 [2021-11-23 16:45:40,840 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 16:45:40,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:45:40,842 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:40,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 241 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 16:45:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 16:45:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 16:45:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 16:45:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-23 16:45:40,857 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-11-23 16:45:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:40,857 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-23 16:45:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2021-11-23 16:45:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-23 16:45:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 16:45:40,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:40,863 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:40,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:41,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 16:45:41,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:41,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:41,483 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-11-23 16:45:41,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:41,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742713488] [2021-11-23 16:45:41,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:45:41,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:41,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:41,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:45:42,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:45:42,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:45:42,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 16:45:42,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:51,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:10,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742713488] [2021-11-23 16:46:10,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742713488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412484961] [2021-11-23 16:46:10,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:10,140 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:10,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:10,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:10,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 16:46:10,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:10,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:10,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 16:46:10,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:14,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:21,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412484961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:21,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780085156] [2021-11-23 16:46:21,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:21,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:21,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:21,666 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:21,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 16:46:23,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:24,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:46:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:27,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:40,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780085156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:40,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:40,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 5, 9, 5, 10] total 16 [2021-11-23 16:46:40,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543768221] [2021-11-23 16:46:40,838 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:40,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:46:40,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:40,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:46:40,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=176, Unknown=5, NotChecked=0, Total=240 [2021-11-23 16:46:40,840 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-11-23 16:46:42,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:46:52,124 WARN L227 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 39 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:47:01,397 WARN L227 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 42 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:47:19,115 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 45 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:47:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:19,767 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-23 16:47:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:47:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) Word has length 13 [2021-11-23 16:47:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:19,789 INFO L225 Difference]: With dead ends: 47 [2021-11-23 16:47:19,789 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 16:47:19,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 74.7s TimeCoverageRelationStatistics Valid=108, Invalid=266, Unknown=6, NotChecked=0, Total=380 [2021-11-23 16:47:19,796 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:19,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 278 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 13 Unchecked, 2.9s Time] [2021-11-23 16:47:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 16:47:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 16:47:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 16:47:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 16:47:19,803 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2021-11-23 16:47:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:19,804 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 16:47:19,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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) [2021-11-23 16:47:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-23 16:47:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:47:19,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:19,805 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:19,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:20,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-23 16:47:20,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:20,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:20,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:20,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -326992466, now seen corresponding path program 1 times [2021-11-23 16:47:20,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:20,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486091270] [2021-11-23 16:47:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:20,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:20,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:20,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:47:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:20,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:47:20,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:21,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:21,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:21,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486091270] [2021-11-23 16:47:21,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486091270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:21,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274658176] [2021-11-23 16:47:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:21,898 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:21,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:21,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:21,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 16:47:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:47:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:24,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:35,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274658176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173387801] [2021-11-23 16:47:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:35,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:35,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:35,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:35,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 16:47:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:36,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 16:47:36,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:39,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:48:04,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173387801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:04,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:48:04,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 7, 5, 11] total 25 [2021-11-23 16:48:04,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470475272] [2021-11-23 16:48:04,233 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:04,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 16:48:04,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 16:48:04,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-23 16:48:04,235 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2021-11-23 16:48:07,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:48:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:07,151 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-23 16:48:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:48:07,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) Word has length 14 [2021-11-23 16:48:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:07,166 INFO L225 Difference]: With dead ends: 35 [2021-11-23 16:48:07,166 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 16:48:07,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-23 16:48:07,168 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:07,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 265 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 16:48:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 16:48:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 16:48:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 16:48:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 16:48:07,175 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-23 16:48:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:07,176 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 16:48:07,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2021-11-23 16:48:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 16:48:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 16:48:07,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:07,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:07,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:07,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-23 16:48:07,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:07,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:07,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:07,784 INFO L85 PathProgramCache]: Analyzing trace with hash -614441937, now seen corresponding path program 1 times [2021-11-23 16:48:07,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:07,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583177556] [2021-11-23 16:48:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:07,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:07,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:07,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:07,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:48:07,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 16:48:07,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:07,997 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:48:08,000 INFO L158 Benchmark]: Toolchain (without parser) took 161234.35ms. Allocated memory is still 67.1MB. Free memory was 51.1MB in the beginning and 37.7MB in the end (delta: 13.4MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. [2021-11-23 16:48:08,000 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 48.2MB. Free memory is still 29.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:48:08,001 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.56ms. Allocated memory is still 67.1MB. Free memory was 50.9MB in the beginning and 50.2MB in the end (delta: 680.7kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 16:48:08,001 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.37ms. Allocated memory is still 67.1MB. Free memory was 50.2MB in the beginning and 48.5MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:48:08,001 INFO L158 Benchmark]: Boogie Preprocessor took 36.30ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 47.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:48:08,002 INFO L158 Benchmark]: RCFGBuilder took 9434.55ms. Allocated memory is still 67.1MB. Free memory was 47.0MB in the beginning and 36.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 16:48:08,002 INFO L158 Benchmark]: TraceAbstraction took 151382.35ms. Allocated memory is still 67.1MB. Free memory was 35.9MB in the beginning and 37.7MB in the end (delta: -1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:48:08,004 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 48.2MB. Free memory is still 29.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.56ms. Allocated memory is still 67.1MB. Free memory was 50.9MB in the beginning and 50.2MB in the end (delta: 680.7kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.37ms. Allocated memory is still 67.1MB. Free memory was 50.2MB in the beginning and 48.5MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.30ms. Allocated memory is still 67.1MB. Free memory was 48.5MB in the beginning and 47.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 9434.55ms. Allocated memory is still 67.1MB. Free memory was 47.0MB in the beginning and 36.3MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 151382.35ms. Allocated memory is still 67.1MB. Free memory was 35.9MB in the beginning and 37.7MB in the end (delta: -1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:48:08,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_215174e4-6bf5-45f9-a652-b25e0b84ee06/bin/utaipan-fb15Y9Yzbl/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: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable