./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1092b.c --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_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/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_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1092b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/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_bcc97c3b-e580-4667-b91f-942f365be4ca/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 b6a79bd811ba30bc3163e272e2b4a2c8d4bc7e99a75fdcec3ffb0e3966342f97 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:51:13,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:51:13,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:51:13,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:51:13,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:51:13,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:51:13,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:51:13,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:51:13,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:51:13,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:51:13,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:51:13,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:51:13,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:51:13,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:51:13,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:51:13,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:51:13,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:51:13,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:51:13,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:51:13,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:51:13,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:51:13,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:51:13,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:51:13,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:51:13,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:51:13,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:51:13,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:51:13,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:51:13,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:51:13,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:51:13,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:51:13,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:51:13,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:51:13,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:51:13,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:51:13,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:51:13,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:51:13,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:51:13,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:51:13,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:51:13,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:51:13,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:51:13,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:51:13,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:51:13,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:51:13,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:51:13,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:51:13,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:51:13,631 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:51:13,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:51:13,632 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:51:13,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:51:13,633 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:51:13,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:51:13,633 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:51:13,634 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:51:13,634 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:51:13,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:51:13,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:51:13,635 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:51:13,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:51:13,636 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:51:13,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:51:13,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:51:13,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:51:13,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:51:13,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:51:13,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:51:13,638 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:51:13,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:51:13,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:51:13,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:51:13,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:51:13,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:51:13,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:13,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:51:13,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:51:13,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:51:13,642 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:51:13,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:51:13,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:51:13,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:51:13,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:51:13,643 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_bcc97c3b-e580-4667-b91f-942f365be4ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6a79bd811ba30bc3163e272e2b4a2c8d4bc7e99a75fdcec3ffb0e3966342f97 [2021-11-23 16:51:14,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:51:14,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:51:14,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:51:14,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:51:14,046 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:51:14,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/float-newlib/double_req_bl_1092b.c [2021-11-23 16:51:14,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/5be4b169c/c62f29a462984ce28fa31c0dafba58fd/FLAG9c2a9dacf [2021-11-23 16:51:14,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:51:14,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/sv-benchmarks/c/float-newlib/double_req_bl_1092b.c [2021-11-23 16:51:14,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/5be4b169c/c62f29a462984ce28fa31c0dafba58fd/FLAG9c2a9dacf [2021-11-23 16:51:15,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/5be4b169c/c62f29a462984ce28fa31c0dafba58fd [2021-11-23 16:51:15,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:51:15,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:51:15,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:15,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:51:15,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:51:15,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c468fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15, skipping insertion in model container [2021-11-23 16:51:15,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:51:15,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:51:15,280 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_bcc97c3b-e580-4667-b91f-942f365be4ca/sv-benchmarks/c/float-newlib/double_req_bl_1092b.c[2109,2122] [2021-11-23 16:51:15,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:15,295 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:51:15,329 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_bcc97c3b-e580-4667-b91f-942f365be4ca/sv-benchmarks/c/float-newlib/double_req_bl_1092b.c[2109,2122] [2021-11-23 16:51:15,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:15,348 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:51:15,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15 WrapperNode [2021-11-23 16:51:15,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:15,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:15,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:51:15,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:51:15,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,399 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-11-23 16:51:15,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:15,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:51:15,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:51:15,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:51:15,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:51:15,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:51:15,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:51:15,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:51:15,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:15" (1/1) ... [2021-11-23 16:51:15,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:15,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:15,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:51:15,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:51:15,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:51:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:51:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:51:15,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-23 16:51:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:51:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-23 16:51:15,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:51:15,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:51:15,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:51:15,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:51:15,699 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:51:15,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:51:16,000 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:51:16,018 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 16:51:16,024 INFO L158 Benchmark]: Toolchain (without parser) took 1013.66ms. Allocated memory was 90.2MB in the beginning and 130.0MB in the end (delta: 39.8MB). Free memory was 53.7MB in the beginning and 89.6MB in the end (delta: -35.9MB). Peak memory consumption was 1.6MB. Max. memory is 16.1GB. [2021-11-23 16:51:16,026 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 90.2MB. Free memory was 69.9MB in the beginning and 69.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:51:16,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.31ms. Allocated memory was 90.2MB in the beginning and 130.0MB in the end (delta: 39.8MB). Free memory was 53.5MB in the beginning and 105.1MB in the end (delta: -51.6MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-11-23 16:51:16,029 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.51ms. Allocated memory is still 130.0MB. Free memory was 105.1MB in the beginning and 103.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:51:16,030 INFO L158 Benchmark]: Boogie Preprocessor took 42.31ms. Allocated memory is still 130.0MB. Free memory was 103.4MB in the beginning and 102.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:51:16,031 INFO L158 Benchmark]: RCFGBuilder took 577.02ms. Allocated memory is still 130.0MB. Free memory was 101.8MB in the beginning and 89.6MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 16:51:16,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 90.2MB. Free memory was 69.9MB in the beginning and 69.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.31ms. Allocated memory was 90.2MB in the beginning and 130.0MB in the end (delta: 39.8MB). Free memory was 53.5MB in the beginning and 105.1MB in the end (delta: -51.6MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.51ms. Allocated memory is still 130.0MB. Free memory was 105.1MB in the beginning and 103.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.31ms. Allocated memory is still 130.0MB. Free memory was 103.4MB in the beginning and 102.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 577.02ms. Allocated memory is still 130.0MB. Free memory was 101.8MB in the beginning and 89.6MB in the end (delta: 12.2MB). 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 16:51:16,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/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_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1092b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/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_bcc97c3b-e580-4667-b91f-942f365be4ca/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 b6a79bd811ba30bc3163e272e2b4a2c8d4bc7e99a75fdcec3ffb0e3966342f97 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:51:19,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:51:19,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:51:19,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:51:19,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:51:19,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:51:19,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:51:19,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:51:19,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:51:19,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:51:19,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:51:19,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:51:19,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:51:19,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:51:19,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:51:19,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:51:19,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:51:19,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:51:19,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:51:19,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:51:19,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:51:19,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:51:19,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:51:19,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:51:19,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:51:19,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:51:19,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:51:19,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:51:19,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:51:19,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:51:19,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:51:19,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:51:19,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:51:19,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:51:19,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:51:19,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:51:19,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:51:19,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:51:19,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:51:19,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:51:19,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:51:19,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:51:19,247 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:51:19,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:51:19,248 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:51:19,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:51:19,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:51:19,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:51:19,250 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:51:19,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:51:19,251 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:51:19,251 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:51:19,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:51:19,253 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:51:19,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:51:19,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:51:19,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:51:19,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:51:19,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:51:19,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:51:19,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:51:19,258 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:51:19,258 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:51:19,258 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:51:19,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:51:19,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:51:19,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:51:19,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:51:19,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:51:19,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:51:19,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:51:19,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:19,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:51:19,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:51:19,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:51:19,262 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:51:19,263 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:51:19,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:51:19,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:51:19,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:51:19,264 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_bcc97c3b-e580-4667-b91f-942f365be4ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6a79bd811ba30bc3163e272e2b4a2c8d4bc7e99a75fdcec3ffb0e3966342f97 [2021-11-23 16:51:19,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:51:19,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:51:19,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:51:19,776 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:51:19,777 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:51:19,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/float-newlib/double_req_bl_1092b.c [2021-11-23 16:51:19,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/177d1cfea/ee99191983d84a55a1819ec1023ebc73/FLAG311fd6d23 [2021-11-23 16:51:20,543 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:51:20,544 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/sv-benchmarks/c/float-newlib/double_req_bl_1092b.c [2021-11-23 16:51:20,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/177d1cfea/ee99191983d84a55a1819ec1023ebc73/FLAG311fd6d23 [2021-11-23 16:51:20,870 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/data/177d1cfea/ee99191983d84a55a1819ec1023ebc73 [2021-11-23 16:51:20,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:51:20,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:51:20,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:20,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:51:20,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:51:20,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee00f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:20, skipping insertion in model container [2021-11-23 16:51:20,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:51:20" (1/1) ... [2021-11-23 16:51:20,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:51:20,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:51:21,175 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_bcc97c3b-e580-4667-b91f-942f365be4ca/sv-benchmarks/c/float-newlib/double_req_bl_1092b.c[2109,2122] [2021-11-23 16:51:21,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:21,207 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:51:21,294 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_bcc97c3b-e580-4667-b91f-942f365be4ca/sv-benchmarks/c/float-newlib/double_req_bl_1092b.c[2109,2122] [2021-11-23 16:51:21,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:51:21,324 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:51:21,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21 WrapperNode [2021-11-23 16:51:21,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:51:21,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:21,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:51:21,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:51:21,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,405 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-11-23 16:51:21,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:51:21,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:51:21,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:51:21,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:51:21,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:51:21,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:51:21,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:51:21,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:51:21,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (1/1) ... [2021-11-23 16:51:21,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:51:21,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:51:21,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:51:21,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:51:21,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:51:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-23 16:51:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-23 16:51:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:51:21,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:51:21,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 16:51:21,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:51:21,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:51:21,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 16:51:21,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:51:21,658 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:51:21,660 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:51:23,413 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:51:23,420 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:51:23,421 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 16:51:23,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:51:23 BoogieIcfgContainer [2021-11-23 16:51:23,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:51:23,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:51:23,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:51:23,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:51:23,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:51:20" (1/3) ... [2021-11-23 16:51:23,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1265a9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:51:23, skipping insertion in model container [2021-11-23 16:51:23,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:51:21" (2/3) ... [2021-11-23 16:51:23,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1265a9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:51:23, skipping insertion in model container [2021-11-23 16:51:23,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:51:23" (3/3) ... [2021-11-23 16:51:23,432 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1092b.c [2021-11-23 16:51:23,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:51:23,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:51:23,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:51:23,528 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 16:51:23,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:51:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 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 16:51:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:51:23,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:23,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:23,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:23,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1046119076, now seen corresponding path program 1 times [2021-11-23 16:51:23,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:23,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71319631] [2021-11-23 16:51:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:23,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:23,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:23,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:23,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:51:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 16:51:23,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:23,770 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 16:51:23,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:23,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:23,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71319631] [2021-11-23 16:51:23,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71319631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:23,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:23,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:51:23,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846466983] [2021-11-23 16:51:23,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:23,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 16:51:23,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 16:51:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 16:51:23,836 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 16:51:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:23,866 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2021-11-23 16:51:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 16:51:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-11-23 16:51:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:23,883 INFO L225 Difference]: With dead ends: 64 [2021-11-23 16:51:23,884 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 16:51:23,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 16:51:23,896 INFO L933 BasicCegarLoop]: 47 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, 47 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 16:51:23,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:51:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 16:51:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 16:51:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 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 16:51:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 44 transitions. [2021-11-23 16:51:23,952 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 44 transitions. Word has length 10 [2021-11-23 16:51:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:23,953 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 44 transitions. [2021-11-23 16:51:23,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 16:51:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 44 transitions. [2021-11-23 16:51:23,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 16:51:23,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:23,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:23,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:24,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:24,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:24,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1289188121, now seen corresponding path program 1 times [2021-11-23 16:51:24,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:24,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894798090] [2021-11-23 16:51:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:24,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:24,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:24,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:24,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:51:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:24,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:51:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:24,608 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 16:51:24,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:24,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:24,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894798090] [2021-11-23 16:51:24,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894798090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:24,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:24,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:51:24,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151055961] [2021-11-23 16:51:24,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:24,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:51:24,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:51:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:24,619 INFO L87 Difference]: Start difference. First operand 30 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:51:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:26,376 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-11-23 16:51:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:51:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:51:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:26,378 INFO L225 Difference]: With dead ends: 37 [2021-11-23 16:51:26,379 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 16:51:26,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:51:26,381 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:26,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 22 Unchecked, 1.7s Time] [2021-11-23 16:51:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 16:51:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 16:51:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 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 16:51:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-11-23 16:51:26,389 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 11 [2021-11-23 16:51:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:26,389 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-11-23 16:51:26,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:51:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-11-23 16:51:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 16:51:26,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:26,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:26,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:26,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:26,606 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:26,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash -58164419, now seen corresponding path program 1 times [2021-11-23 16:51:26,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:26,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799543486] [2021-11-23 16:51:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:26,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:26,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:26,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:26,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:51:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:51:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:26,921 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 16:51:26,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:26,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799543486] [2021-11-23 16:51:26,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799543486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:26,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:26,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:51:26,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499118310] [2021-11-23 16:51:26,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:26,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:51:26,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:26,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:51:26,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:26,925 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:51:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:27,513 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2021-11-23 16:51:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:51:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:51:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:27,515 INFO L225 Difference]: With dead ends: 33 [2021-11-23 16:51:27,515 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 16:51:27,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:51:27,518 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:27,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 11 Unchecked, 0.6s Time] [2021-11-23 16:51:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 16:51:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 16:51:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 16:51:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-23 16:51:27,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-23 16:51:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:27,523 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-23 16:51:27,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 16:51:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-23 16:51:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:51:27,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:27,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:27,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 16:51:27,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:27,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash -713684991, now seen corresponding path program 1 times [2021-11-23 16:51:27,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:27,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439671521] [2021-11-23 16:51:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:27,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:27,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:27,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:27,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:51:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:51:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:28,143 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 16:51:28,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:28,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:28,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439671521] [2021-11-23 16:51:28,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439671521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:28,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:28,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:51:28,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900512442] [2021-11-23 16:51:28,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:28,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:51:28,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:51:28,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:51:28,148 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16:51:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:28,237 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-11-23 16:51:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:51:28,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16:51:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:28,239 INFO L225 Difference]: With dead ends: 24 [2021-11-23 16:51:28,239 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 16:51:28,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:51:28,241 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:28,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 20 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:51:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 16:51:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 16:51:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 16:51:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-23 16:51:28,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-11-23 16:51:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:28,246 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-23 16:51:28,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16:51:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-23 16:51:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 16:51:28,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:28,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:28,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:28,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:28,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1568599403, now seen corresponding path program 1 times [2021-11-23 16:51:28,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:28,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629509172] [2021-11-23 16:51:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:28,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:28,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:28,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:28,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:51:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:28,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:51:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:28,872 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 16:51:28,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:28,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:28,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629509172] [2021-11-23 16:51:28,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629509172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:28,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:28,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:51:28,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236235111] [2021-11-23 16:51:28,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:28,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:51:28,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:51:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:51:28,883 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 16:51:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:28,918 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-23 16:51:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:51:28,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-11-23 16:51:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:28,920 INFO L225 Difference]: With dead ends: 24 [2021-11-23 16:51:28,920 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 16:51:28,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:28,922 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:28,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2021-11-23 16:51:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 16:51:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 16:51:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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 16:51:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-23 16:51:28,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-11-23 16:51:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:28,928 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-23 16:51:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 16:51:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-23 16:51:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:51:28,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:28,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:28,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:29,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:29,141 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1786240041, now seen corresponding path program 1 times [2021-11-23 16:51:29,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:29,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296732538] [2021-11-23 16:51:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:29,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:29,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:29,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:29,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:51:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:29,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:51:29,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:29,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 16:51:29,654 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 16:51:29,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:51:29,654 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:51:29,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296732538] [2021-11-23 16:51:29,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296732538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:51:29,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:51:29,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:51:29,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237835591] [2021-11-23 16:51:29,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:51:29,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:51:29,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:51:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:51:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:51:29,660 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16:51:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:51:29,730 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2021-11-23 16:51:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:51:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2021-11-23 16:51:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:51:29,736 INFO L225 Difference]: With dead ends: 24 [2021-11-23 16:51:29,736 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 16:51:29,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:51:29,738 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:51:29,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2021-11-23 16:51:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 16:51:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 16:51:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0) internal successors, (16), 16 states have internal predecessors, (16), 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 16:51:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2021-11-23 16:51:29,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 16 [2021-11-23 16:51:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:51:29,745 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2021-11-23 16:51:29,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16:51:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2021-11-23 16:51:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:51:29,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:51:29,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:51:29,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:51:29,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:51:29,947 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:51:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:51:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash -11232679, now seen corresponding path program 1 times [2021-11-23 16:51:29,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:51:29,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972877615] [2021-11-23 16:51:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:51:29,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:51:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:51:29,949 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:51:29,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcc97c3b-e580-4667-b91f-942f365be4ca/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:51:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:51:30,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:51:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:51:30,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 16 [2021-11-23 16:51:30,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:51:30,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 61 [2021-11-23 16:51:30,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21