./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label58.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label58.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 a5f87b8357f03d9a8be5e507a55ad1b488f3fb22c6f294c5cc7e1ddb521502de --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:47,096 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:47,242 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:32:47,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:47,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:47,298 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:47,300 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:47,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:47,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:47,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:47,308 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:47,309 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:47,309 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:47,311 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:47,312 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:47,312 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:47,312 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:47,313 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:47,313 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:47,314 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:47,314 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:47,315 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:47,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:47,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:47,317 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:32:47,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:47,318 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:32:47,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:47,319 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:47,319 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:47,320 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:47,321 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:32:47,321 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:47,321 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:47,321 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:47,322 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:47,322 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:47,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:47,322 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:47,323 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:47,323 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:47,323 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:47,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:47,324 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:47,324 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:47,325 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:47,325 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:47,325 INFO L153 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_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5f87b8357f03d9a8be5e507a55ad1b488f3fb22c6f294c5cc7e1ddb521502de [2023-11-23 20:32:47,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:47,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:47,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:47,713 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:47,713 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:47,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/eca-rers2012/Problem01_label58.c [2023-11-23 20:32:50,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:51,339 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:51,340 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/sv-benchmarks/c/eca-rers2012/Problem01_label58.c [2023-11-23 20:32:51,367 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/data/520a024cd/f2a2fddebba641d3b84e5ad45014d977/FLAG4bfebc266 [2023-11-23 20:32:51,383 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/data/520a024cd/f2a2fddebba641d3b84e5ad45014d977 [2023-11-23 20:32:51,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:51,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:51,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:51,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:51,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:51,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75adb6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51, skipping insertion in model container [2023-11-23 20:32:51,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,447 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:51,847 WARN L240 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_0f7731ca-476e-40d3-8780-6c2ec03b1c50/sv-benchmarks/c/eca-rers2012/Problem01_label58.c[17861,17874] [2023-11-23 20:32:51,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:51,939 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:52,065 WARN L240 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_0f7731ca-476e-40d3-8780-6c2ec03b1c50/sv-benchmarks/c/eca-rers2012/Problem01_label58.c[17861,17874] [2023-11-23 20:32:52,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:52,099 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:52,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52 WrapperNode [2023-11-23 20:32:52,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:52,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:52,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:52,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:52,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,202 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 658 [2023-11-23 20:32:52,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:52,210 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:52,210 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:52,210 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:52,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:52,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:52,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:52,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:52,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:52,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:52,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:52,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:52,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:52,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:32:52,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:52,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:52,655 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:52,658 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:53,691 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:54,008 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:54,008 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:32:54,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:54 BoogieIcfgContainer [2023-11-23 20:32:54,010 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:54,014 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:54,014 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:54,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:54,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:51" (1/3) ... [2023-11-23 20:32:54,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d537c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:54, skipping insertion in model container [2023-11-23 20:32:54,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52" (2/3) ... [2023-11-23 20:32:54,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d537c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:54, skipping insertion in model container [2023-11-23 20:32:54,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:54" (3/3) ... [2023-11-23 20:32:54,024 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label58.c [2023-11-23 20:32:54,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:54,046 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:32:54,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:54,118 INFO L357 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=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21ce0bf0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:54,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:32:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2023-11-23 20:32:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 20:32:54,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:54,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:54,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:54,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1230145297, now seen corresponding path program 1 times [2023-11-23 20:32:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:54,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314252281] [2023-11-23 20:32:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:54,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314252281] [2023-11-23 20:32:54,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314252281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:54,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:54,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:32:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476433121] [2023-11-23 20:32:54,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:54,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:54,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:54,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:54,759 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2023-11-23 20:32:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:55,310 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2023-11-23 20:32:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 71 [2023-11-23 20:32:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:55,325 INFO L225 Difference]: With dead ends: 224 [2023-11-23 20:32:55,325 INFO L226 Difference]: Without dead ends: 145 [2023-11-23 20:32:55,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:55,332 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:55,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:32:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-23 20:32:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-23 20:32:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7569444444444444) internal successors, (253), 144 states have internal predecessors, (253), 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) [2023-11-23 20:32:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2023-11-23 20:32:55,385 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2023-11-23 20:32:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:55,386 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2023-11-23 20:32:55,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2023-11-23 20:32:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2023-11-23 20:32:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 20:32:55,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:55,390 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:32:55,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:55,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash -201558711, now seen corresponding path program 1 times [2023-11-23 20:32:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:55,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221638702] [2023-11-23 20:32:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:55,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:55,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221638702] [2023-11-23 20:32:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221638702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:55,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81597001] [2023-11-23 20:32:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:55,656 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-11-23 20:32:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:56,132 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2023-11-23 20:32:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:56,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 75 [2023-11-23 20:32:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:56,141 INFO L225 Difference]: With dead ends: 431 [2023-11-23 20:32:56,141 INFO L226 Difference]: Without dead ends: 287 [2023-11-23 20:32:56,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:56,147 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:56,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:32:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-23 20:32:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2023-11-23 20:32:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.786046511627907) internal successors, (384), 215 states have internal predecessors, (384), 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) [2023-11-23 20:32:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 384 transitions. [2023-11-23 20:32:56,177 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 384 transitions. Word has length 75 [2023-11-23 20:32:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:56,178 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 384 transitions. [2023-11-23 20:32:56,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2023-11-23 20:32:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 384 transitions. [2023-11-23 20:32:56,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 20:32:56,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:56,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:56,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:32:56,184 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:56,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2025670359, now seen corresponding path program 1 times [2023-11-23 20:32:56,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:56,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756535413] [2023-11-23 20:32:56,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:56,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:56,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756535413] [2023-11-23 20:32:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756535413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:56,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:56,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:32:56,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152596201] [2023-11-23 20:32:56,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:56,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:56,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:56,309 INFO L87 Difference]: Start difference. First operand 216 states and 384 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2023-11-23 20:32:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:56,694 INFO L93 Difference]: Finished difference Result 573 states and 1011 transitions. [2023-11-23 20:32:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 76 [2023-11-23 20:32:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:56,698 INFO L225 Difference]: With dead ends: 573 [2023-11-23 20:32:56,699 INFO L226 Difference]: Without dead ends: 358 [2023-11-23 20:32:56,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:56,704 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:56,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 25 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:32:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-23 20:32:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2023-11-23 20:32:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.607843137254902) internal successors, (574), 357 states have internal predecessors, (574), 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) [2023-11-23 20:32:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 574 transitions. [2023-11-23 20:32:56,732 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 574 transitions. Word has length 76 [2023-11-23 20:32:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:56,732 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 574 transitions. [2023-11-23 20:32:56,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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) [2023-11-23 20:32:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 574 transitions. [2023-11-23 20:32:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 20:32:56,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:56,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:56,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:32:56,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:56,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash 368601472, now seen corresponding path program 1 times [2023-11-23 20:32:56,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:56,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064105515] [2023-11-23 20:32:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:56,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:32:56,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064105515] [2023-11-23 20:32:56,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064105515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:56,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:56,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:32:56,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170803462] [2023-11-23 20:32:56,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:56,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:56,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:56,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:56,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:56,981 INFO L87 Difference]: Start difference. First operand 358 states and 574 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2023-11-23 20:32:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:57,285 INFO L93 Difference]: Finished difference Result 715 states and 1147 transitions. [2023-11-23 20:32:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:57,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 87 [2023-11-23 20:32:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:57,288 INFO L225 Difference]: With dead ends: 715 [2023-11-23 20:32:57,289 INFO L226 Difference]: Without dead ends: 358 [2023-11-23 20:32:57,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:57,291 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:57,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 58 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:32:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-23 20:32:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2023-11-23 20:32:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.5910364145658262) internal successors, (568), 357 states have internal predecessors, (568), 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) [2023-11-23 20:32:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 568 transitions. [2023-11-23 20:32:57,305 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 568 transitions. Word has length 87 [2023-11-23 20:32:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:57,305 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 568 transitions. [2023-11-23 20:32:57,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2023-11-23 20:32:57,306 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 568 transitions. [2023-11-23 20:32:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-23 20:32:57,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:57,308 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:57,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:32:57,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:57,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:57,310 INFO L85 PathProgramCache]: Analyzing trace with hash -533796936, now seen corresponding path program 1 times [2023-11-23 20:32:57,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:57,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889196176] [2023-11-23 20:32:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:32:57,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:57,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889196176] [2023-11-23 20:32:57,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889196176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:57,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216749952] [2023-11-23 20:32:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:57,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:57,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:57,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:57,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:32:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:57,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:32:57,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:32:57,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:57,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216749952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:57,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:32:57,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-23 20:32:57,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73300005] [2023-11-23 20:32:57,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:57,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:57,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:57,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:57,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:57,881 INFO L87 Difference]: Start difference. First operand 358 states and 568 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-23 20:32:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:58,207 INFO L93 Difference]: Finished difference Result 500 states and 770 transitions. [2023-11-23 20:32:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 91 [2023-11-23 20:32:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:58,211 INFO L225 Difference]: With dead ends: 500 [2023-11-23 20:32:58,212 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 20:32:58,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:58,214 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:58,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:32:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 20:32:58,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 20:32:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 20:32:58,217 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2023-11-23 20:32:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:58,217 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 20:32:58,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2023-11-23 20:32:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 20:32:58,219 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 20:32:58,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 20:32:58,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:58,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:58,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-23 20:32:58,470 INFO L899 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2023-11-23 20:32:58,470 INFO L899 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2023-11-23 20:32:58,470 INFO L899 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2023-11-23 20:32:58,471 INFO L899 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2023-11-23 20:32:58,472 INFO L899 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2023-11-23 20:32:58,476 INFO L899 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2023-11-23 20:32:58,476 INFO L899 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2023-11-23 20:32:58,476 INFO L899 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2023-11-23 20:32:58,477 INFO L899 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2023-11-23 20:32:58,477 INFO L899 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2023-11-23 20:32:58,477 INFO L899 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2023-11-23 20:32:58,477 INFO L899 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2023-11-23 20:32:58,477 INFO L899 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2023-11-23 20:32:58,477 INFO L899 garLoopResultBuilder]: For program point L479-1(lines 40 585) no Hoare annotation was computed. [2023-11-23 20:32:58,477 INFO L899 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2023-11-23 20:32:58,478 INFO L899 garLoopResultBuilder]: For program point L482-1(lines 40 585) no Hoare annotation was computed. [2023-11-23 20:32:58,479 INFO L899 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2023-11-23 20:32:58,479 INFO L899 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2023-11-23 20:32:58,479 INFO L899 garLoopResultBuilder]: For program point L483(line 483) no Hoare annotation was computed. [2023-11-23 20:32:58,479 INFO L899 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2023-11-23 20:32:58,479 INFO L899 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2023-11-23 20:32:58,479 INFO L899 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2023-11-23 20:32:58,479 INFO L899 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2023-11-23 20:32:58,480 INFO L899 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2023-11-23 20:32:58,480 INFO L899 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2023-11-23 20:32:58,480 INFO L899 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point L587(lines 587 604) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2023-11-23 20:32:58,481 INFO L899 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2023-11-23 20:32:58,482 INFO L899 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2023-11-23 20:32:58,483 INFO L899 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2023-11-23 20:32:58,483 INFO L899 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2023-11-23 20:32:58,483 INFO L895 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (or (< ~a16~0 6) (and (= ~a21~0 1) (<= 15 ~a8~0)) (= ~a20~0 1)) [2023-11-23 20:32:58,483 INFO L899 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2023-11-23 20:32:58,483 INFO L899 garLoopResultBuilder]: For program point calculate_output_returnLabel#1(lines 40 585) no Hoare annotation was computed. [2023-11-23 20:32:58,483 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 483) no Hoare annotation was computed. [2023-11-23 20:32:58,484 INFO L899 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2023-11-23 20:32:58,484 INFO L899 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2023-11-23 20:32:58,484 INFO L899 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2023-11-23 20:32:58,484 INFO L899 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2023-11-23 20:32:58,484 INFO L899 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2023-11-23 20:32:58,484 INFO L899 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2023-11-23 20:32:58,487 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-23 20:32:58,489 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 20:32:58,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:32:58 BoogieIcfgContainer [2023-11-23 20:32:58,501 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 20:32:58,502 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 20:32:58,502 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 20:32:58,502 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 20:32:58,503 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:54" (3/4) ... [2023-11-23 20:32:58,505 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 20:32:58,528 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 119 nodes and edges [2023-11-23 20:32:58,529 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-23 20:32:58,531 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-23 20:32:58,533 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-23 20:32:58,717 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 20:32:58,717 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/witness.yml [2023-11-23 20:32:58,718 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 20:32:58,718 INFO L158 Benchmark]: Toolchain (without parser) took 7331.63ms. Allocated memory was 167.8MB in the beginning and 205.5MB in the end (delta: 37.7MB). Free memory was 134.3MB in the beginning and 77.5MB in the end (delta: 56.8MB). Peak memory consumption was 94.3MB. Max. memory is 16.1GB. [2023-11-23 20:32:58,719 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory is still 88.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:32:58,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 712.07ms. Allocated memory is still 167.8MB. Free memory was 133.6MB in the beginning and 105.7MB in the end (delta: 28.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-23 20:32:58,720 INFO L158 Benchmark]: Boogie Procedure Inliner took 107.77ms. Allocated memory is still 167.8MB. Free memory was 105.7MB in the beginning and 100.0MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-23 20:32:58,720 INFO L158 Benchmark]: Boogie Preprocessor took 133.01ms. Allocated memory is still 167.8MB. Free memory was 100.0MB in the beginning and 95.3MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 20:32:58,720 INFO L158 Benchmark]: RCFGBuilder took 1666.81ms. Allocated memory is still 167.8MB. Free memory was 95.3MB in the beginning and 80.8MB in the end (delta: 14.5MB). Peak memory consumption was 44.8MB. Max. memory is 16.1GB. [2023-11-23 20:32:58,722 INFO L158 Benchmark]: TraceAbstraction took 4487.88ms. Allocated memory was 167.8MB in the beginning and 205.5MB in the end (delta: 37.7MB). Free memory was 79.8MB in the beginning and 90.0MB in the end (delta: -10.3MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2023-11-23 20:32:58,722 INFO L158 Benchmark]: Witness Printer took 215.79ms. Allocated memory is still 205.5MB. Free memory was 90.0MB in the beginning and 77.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 20:32:58,726 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 115.3MB. Free memory is still 88.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 712.07ms. Allocated memory is still 167.8MB. Free memory was 133.6MB in the beginning and 105.7MB in the end (delta: 28.0MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 107.77ms. Allocated memory is still 167.8MB. Free memory was 105.7MB in the beginning and 100.0MB in the end (delta: 5.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 133.01ms. Allocated memory is still 167.8MB. Free memory was 100.0MB in the beginning and 95.3MB in the end (delta: 4.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1666.81ms. Allocated memory is still 167.8MB. Free memory was 95.3MB in the beginning and 80.8MB in the end (delta: 14.5MB). Peak memory consumption was 44.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4487.88ms. Allocated memory was 167.8MB in the beginning and 205.5MB in the end (delta: 37.7MB). Free memory was 79.8MB in the beginning and 90.0MB in the end (delta: -10.3MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. * Witness Printer took 215.79ms. Allocated memory is still 205.5MB. Free memory was 90.0MB in the beginning and 77.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 483]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 243 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 243 mSDsluCounter, 158 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19 mSDsCounter, 306 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1029 IncrementalHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 306 mSolverCounterUnsat, 139 mSDtfsCounter, 1029 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=358occurred in iteration=3, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 71 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 8 NumberOfFragments, 14 HoareAnnotationTreeSize, 1 FomulaSimplifications, 63 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 491 NumberOfCodeBlocks, 491 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 485 ConstructedInterpolants, 0 QuantifiedInterpolants, 1066 SizeOfPredicates, 0 NumberOfNonLiveVariables, 279 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 83/86 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((a16 < 6) || ((a21 == 1) && (15 <= a8))) || (a20 == 1)) RESULT: Ultimate proved your program to be correct! [2023-11-23 20:32:58,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f7731ca-476e-40d3-8780-6c2ec03b1c50/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE