./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem02_label32.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem02_label32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje --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 dfcc0c3466e0ad99a1193d0083cedd3fc450234fcd184acb12bef00501b42460 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:14:00,109 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:14:00,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:14:00,216 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:14:00,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:14:00,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:14:00,270 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:14:00,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:14:00,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:14:00,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:14:00,273 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:14:00,274 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:14:00,274 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:14:00,275 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:14:00,275 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:14:00,276 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:14:00,276 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:14:00,277 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:14:00,277 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:14:00,278 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:14:00,279 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:14:00,279 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:14:00,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:14:00,281 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:14:00,282 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:14:00,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:14:00,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:14:00,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:14:00,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:14:00,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:14:00,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:14:00,285 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:14:00,304 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:14:00,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:14:00,306 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:14:00,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:14:00,307 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:14:00,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:14:00,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:00,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:14:00,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:14:00,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:14:00,310 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:14:00,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:14:00,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:14:00,311 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:14:00,312 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:14:00,312 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_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfcc0c3466e0ad99a1193d0083cedd3fc450234fcd184acb12bef00501b42460 [2024-11-09 01:14:00,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:14:00,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:14:00,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:14:00,728 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:14:00,730 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:14:00,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/eca-rers2012/Problem02_label32.c Unable to find full path for "g++" [2024-11-09 01:14:03,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:14:03,853 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:14:03,853 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/sv-benchmarks/c/eca-rers2012/Problem02_label32.c [2024-11-09 01:14:03,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/data/82439b497/3c0360caa87245bc909db48b8760e82e/FLAGeae7090dc [2024-11-09 01:14:03,900 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/data/82439b497/3c0360caa87245bc909db48b8760e82e [2024-11-09 01:14:03,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:14:03,908 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:14:03,910 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:03,911 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:14:03,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:14:03,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:03" (1/1) ... [2024-11-09 01:14:03,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657e9ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:03, skipping insertion in model container [2024-11-09 01:14:03,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:03" (1/1) ... [2024-11-09 01:14:04,000 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:14:04,541 WARN L250 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_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/sv-benchmarks/c/eca-rers2012/Problem02_label32.c[17811,17824] [2024-11-09 01:14:04,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:04,603 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:14:04,802 WARN L250 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_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/sv-benchmarks/c/eca-rers2012/Problem02_label32.c[17811,17824] [2024-11-09 01:14:04,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:04,845 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:14:04,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04 WrapperNode [2024-11-09 01:14:04,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:04,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:04,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:14:04,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:14:04,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:04,880 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:04,963 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 668 [2024-11-09 01:14:04,967 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:04,968 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:14:04,969 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:14:04,969 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:14:04,990 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:04,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,027 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:14:05,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:14:05,061 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:14:05,062 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:14:05,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (1/1) ... [2024-11-09 01:14:05,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:05,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:05,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:14:05,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:14:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:14:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:14:05,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:14:05,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:14:05,319 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:14:05,324 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:14:07,133 INFO L? ?]: Removed 84 outVars from TransFormulas that were not future-live. [2024-11-09 01:14:07,133 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:14:07,583 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:14:07,585 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 01:14:07,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:07 BoogieIcfgContainer [2024-11-09 01:14:07,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:14:07,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:14:07,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:14:07,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:14:07,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:14:03" (1/3) ... [2024-11-09 01:14:07,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db8a075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:07, skipping insertion in model container [2024-11-09 01:14:07,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:04" (2/3) ... [2024-11-09 01:14:07,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db8a075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:07, skipping insertion in model container [2024-11-09 01:14:07,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:07" (3/3) ... [2024-11-09 01:14:07,602 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2024-11-09 01:14:07,633 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:14:07,635 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:14:07,744 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:14:07,754 INFO L333 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, 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;@473c691a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:14:07,754 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:14:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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) [2024-11-09 01:14:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-09 01:14:07,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:07,771 INFO L215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:07,772 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:07,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash 545127347, now seen corresponding path program 1 times [2024-11-09 01:14:07,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:07,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372922449] [2024-11-09 01:14:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:07,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:08,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372922449] [2024-11-09 01:14:08,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372922449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:08,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:14:08,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283241771] [2024-11-09 01:14:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:08,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:08,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:14:08,511 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.9518072289156627) internal successors, (162), 84 states have internal predecessors, (162), 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 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2024-11-09 01:14:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:09,320 INFO L93 Difference]: Finished difference Result 251 states and 482 transitions. [2024-11-09 01:14:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2024-11-09 01:14:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:09,338 INFO L225 Difference]: With dead ends: 251 [2024-11-09 01:14:09,339 INFO L226 Difference]: Without dead ends: 163 [2024-11-09 01:14:09,343 INFO L431 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 [2024-11-09 01:14:09,347 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:09,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 01:14:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-09 01:14:09,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2024-11-09 01:14:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.7777777777777777) internal successors, (288), 162 states have internal predecessors, (288), 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) [2024-11-09 01:14:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 288 transitions. [2024-11-09 01:14:09,435 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 288 transitions. Word has length 80 [2024-11-09 01:14:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:09,436 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 288 transitions. [2024-11-09 01:14:09,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2024-11-09 01:14:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 288 transitions. [2024-11-09 01:14:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-09 01:14:09,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:09,441 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2024-11-09 01:14:09,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:14:09,442 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:09,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:09,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1724847950, now seen corresponding path program 1 times [2024-11-09 01:14:09,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:09,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928570720] [2024-11-09 01:14:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:09,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:09,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:09,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928570720] [2024-11-09 01:14:09,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928570720] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:09,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:09,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:14:09,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232579156] [2024-11-09 01:14:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:09,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:09,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:14:09,832 INFO L87 Difference]: Start difference. First operand 163 states and 288 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2024-11-09 01:14:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:10,458 INFO L93 Difference]: Finished difference Result 487 states and 862 transitions. [2024-11-09 01:14:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 98 [2024-11-09 01:14:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:10,464 INFO L225 Difference]: With dead ends: 487 [2024-11-09 01:14:10,467 INFO L226 Difference]: Without dead ends: 325 [2024-11-09 01:14:10,468 INFO L431 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 [2024-11-09 01:14:10,473 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:10,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 26 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:14:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-09 01:14:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2024-11-09 01:14:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.673913043478261) internal successors, (539), 322 states have internal predecessors, (539), 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) [2024-11-09 01:14:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 539 transitions. [2024-11-09 01:14:10,531 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 539 transitions. Word has length 98 [2024-11-09 01:14:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:10,532 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 539 transitions. [2024-11-09 01:14:10,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2024-11-09 01:14:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 539 transitions. [2024-11-09 01:14:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 01:14:10,545 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:10,546 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2024-11-09 01:14:10,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:14:10,546 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:10,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676991, now seen corresponding path program 1 times [2024-11-09 01:14:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:10,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692716068] [2024-11-09 01:14:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:10,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:10,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692716068] [2024-11-09 01:14:10,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692716068] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:10,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:14:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316115148] [2024-11-09 01:14:10,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:10,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:14:10,859 INFO L87 Difference]: Start difference. First operand 323 states and 539 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2024-11-09 01:14:11,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:11,178 INFO L93 Difference]: Finished difference Result 645 states and 1077 transitions. [2024-11-09 01:14:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:11,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 99 [2024-11-09 01:14:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:11,182 INFO L225 Difference]: With dead ends: 645 [2024-11-09 01:14:11,182 INFO L226 Difference]: Without dead ends: 323 [2024-11-09 01:14:11,186 INFO L431 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 [2024-11-09 01:14:11,188 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:11,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 4 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:14:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-09 01:14:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2024-11-09 01:14:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5186335403726707) internal successors, (489), 322 states have internal predecessors, (489), 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) [2024-11-09 01:14:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 489 transitions. [2024-11-09 01:14:11,212 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 489 transitions. Word has length 99 [2024-11-09 01:14:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:11,213 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 489 transitions. [2024-11-09 01:14:11,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2024-11-09 01:14:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 489 transitions. [2024-11-09 01:14:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 01:14:11,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:11,217 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 01:14:11,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:14:11,218 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:11,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1105116063, now seen corresponding path program 1 times [2024-11-09 01:14:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:11,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018981187] [2024-11-09 01:14:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:11,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:11,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018981187] [2024-11-09 01:14:11,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018981187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:11,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:14:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660872310] [2024-11-09 01:14:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:11,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:11,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:11,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:11,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:14:11,473 INFO L87 Difference]: Start difference. First operand 323 states and 489 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2024-11-09 01:14:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:12,011 INFO L93 Difference]: Finished difference Result 965 states and 1464 transitions. [2024-11-09 01:14:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 104 [2024-11-09 01:14:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:12,015 INFO L225 Difference]: With dead ends: 965 [2024-11-09 01:14:12,016 INFO L226 Difference]: Without dead ends: 643 [2024-11-09 01:14:12,017 INFO L431 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 [2024-11-09 01:14:12,021 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:12,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 59 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2024-11-09 01:14:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 643. [2024-11-09 01:14:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 1.3068535825545171) internal successors, (839), 642 states have internal predecessors, (839), 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) [2024-11-09 01:14:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 839 transitions. [2024-11-09 01:14:12,069 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 839 transitions. Word has length 104 [2024-11-09 01:14:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:12,072 INFO L471 AbstractCegarLoop]: Abstraction has 643 states and 839 transitions. [2024-11-09 01:14:12,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2024-11-09 01:14:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 839 transitions. [2024-11-09 01:14:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 01:14:12,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:12,081 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1] [2024-11-09 01:14:12,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 01:14:12,082 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:12,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:12,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1555705024, now seen corresponding path program 1 times [2024-11-09 01:14:12,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:12,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078585093] [2024-11-09 01:14:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:12,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:12,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:12,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078585093] [2024-11-09 01:14:12,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078585093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:12,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219081851] [2024-11-09 01:14:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:12,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:12,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:12,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:14:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:13,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:13,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 01:14:13,321 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:13,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219081851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:13,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:13,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-09 01:14:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244237731] [2024-11-09 01:14:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:13,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:13,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:13,327 INFO L87 Difference]: Start difference. First operand 643 states and 839 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2024-11-09 01:14:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:13,877 INFO L93 Difference]: Finished difference Result 1525 states and 2038 transitions. [2024-11-09 01:14:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:13,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 107 [2024-11-09 01:14:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:13,883 INFO L225 Difference]: With dead ends: 1525 [2024-11-09 01:14:13,884 INFO L226 Difference]: Without dead ends: 883 [2024-11-09 01:14:13,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:13,888 INFO L432 NwaCegarLoop]: 115 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:13,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 119 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2024-11-09 01:14:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2024-11-09 01:14:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.280045351473923) internal successors, (1129), 882 states have internal predecessors, (1129), 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) [2024-11-09 01:14:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1129 transitions. [2024-11-09 01:14:13,929 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1129 transitions. Word has length 107 [2024-11-09 01:14:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:13,930 INFO L471 AbstractCegarLoop]: Abstraction has 883 states and 1129 transitions. [2024-11-09 01:14:13,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2024-11-09 01:14:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1129 transitions. [2024-11-09 01:14:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 01:14:13,933 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:13,934 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2024-11-09 01:14:13,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:14,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:14,135 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:14,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1010346658, now seen corresponding path program 1 times [2024-11-09 01:14:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:14,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360062500] [2024-11-09 01:14:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 01:14:14,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:14,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360062500] [2024-11-09 01:14:14,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360062500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:14,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:14,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:14:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534258502] [2024-11-09 01:14:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:14,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:14,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:14:14,362 INFO L87 Difference]: Start difference. First operand 883 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-11-09 01:14:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:14,844 INFO L93 Difference]: Finished difference Result 1845 states and 2352 transitions. [2024-11-09 01:14:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 124 [2024-11-09 01:14:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:14,850 INFO L225 Difference]: With dead ends: 1845 [2024-11-09 01:14:14,850 INFO L226 Difference]: Without dead ends: 803 [2024-11-09 01:14:14,852 INFO L431 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 [2024-11-09 01:14:14,857 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:14,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 16 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:14:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2024-11-09 01:14:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2024-11-09 01:14:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.1633416458852868) internal successors, (933), 802 states have internal predecessors, (933), 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) [2024-11-09 01:14:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 933 transitions. [2024-11-09 01:14:14,886 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 933 transitions. Word has length 124 [2024-11-09 01:14:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:14,887 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 933 transitions. [2024-11-09 01:14:14,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-11-09 01:14:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 933 transitions. [2024-11-09 01:14:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-09 01:14:14,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:14,890 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2024-11-09 01:14:14,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 01:14:14,890 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:14,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash -392075116, now seen corresponding path program 1 times [2024-11-09 01:14:14,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:14,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638374184] [2024-11-09 01:14:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 01:14:15,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:15,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638374184] [2024-11-09 01:14:15,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638374184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:15,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601336105] [2024-11-09 01:14:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:15,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:15,578 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:15,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:14:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:15,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:15,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 01:14:16,099 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601336105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:16,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:16,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-09 01:14:16,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437798343] [2024-11-09 01:14:16,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:16,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:16,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:16,103 INFO L87 Difference]: Start difference. First operand 803 states and 933 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2024-11-09 01:14:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:16,511 INFO L93 Difference]: Finished difference Result 1045 states and 1214 transitions. [2024-11-09 01:14:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:16,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 128 [2024-11-09 01:14:16,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:16,516 INFO L225 Difference]: With dead ends: 1045 [2024-11-09 01:14:16,516 INFO L226 Difference]: Without dead ends: 1043 [2024-11-09 01:14:16,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:16,518 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:16,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:14:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2024-11-09 01:14:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 883. [2024-11-09 01:14:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.1780045351473922) internal successors, (1039), 882 states have internal predecessors, (1039), 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) [2024-11-09 01:14:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1039 transitions. [2024-11-09 01:14:16,545 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1039 transitions. Word has length 128 [2024-11-09 01:14:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:16,547 INFO L471 AbstractCegarLoop]: Abstraction has 883 states and 1039 transitions. [2024-11-09 01:14:16,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2024-11-09 01:14:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1039 transitions. [2024-11-09 01:14:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-09 01:14:16,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:16,552 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 01:14:16,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:14:16,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 01:14:16,753 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:16,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2051205657, now seen corresponding path program 1 times [2024-11-09 01:14:16,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:16,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68864496] [2024-11-09 01:14:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 87 proven. 8 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 01:14:17,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68864496] [2024-11-09 01:14:17,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68864496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215594398] [2024-11-09 01:14:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:17,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:17,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:17,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:17,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:14:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:17,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:17,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 01:14:17,581 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215594398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:17,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:17,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-09 01:14:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955007455] [2024-11-09 01:14:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:17,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:17,584 INFO L87 Difference]: Start difference. First operand 883 states and 1039 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-11-09 01:14:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:17,923 INFO L93 Difference]: Finished difference Result 1923 states and 2287 transitions. [2024-11-09 01:14:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:17,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 154 [2024-11-09 01:14:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:17,929 INFO L225 Difference]: With dead ends: 1923 [2024-11-09 01:14:17,929 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 01:14:17,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:17,931 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 9 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:17,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:14:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 01:14:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 01:14:17,935 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) [2024-11-09 01:14:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 01:14:17,935 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 154 [2024-11-09 01:14:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:17,937 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 01:14:17,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2024-11-09 01:14:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 01:14:17,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 01:14:17,940 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 01:14:17,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:18,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:18,149 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:18,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 01:14:18,313 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 01:14:18,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:14:18 BoogieIcfgContainer [2024-11-09 01:14:18,334 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 01:14:18,335 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 01:14:18,335 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 01:14:18,335 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 01:14:18,335 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:07" (3/4) ... [2024-11-09 01:14:18,338 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 01:14:18,365 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 128 nodes and edges [2024-11-09 01:14:18,366 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-09 01:14:18,367 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-11-09 01:14:18,369 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 01:14:18,545 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 01:14:18,545 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 01:14:18,545 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 01:14:18,546 INFO L158 Benchmark]: Toolchain (without parser) took 14637.80ms. Allocated memory was 151.0MB in the beginning and 295.7MB in the end (delta: 144.7MB). Free memory was 108.8MB in the beginning and 130.3MB in the end (delta: -21.4MB). Peak memory consumption was 125.2MB. Max. memory is 16.1GB. [2024-11-09 01:14:18,548 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 151.0MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 01:14:18,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 936.61ms. Allocated memory is still 151.0MB. Free memory was 108.8MB in the beginning and 79.0MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-11-09 01:14:18,549 INFO L158 Benchmark]: Boogie Procedure Inliner took 120.21ms. Allocated memory is still 151.0MB. Free memory was 79.0MB in the beginning and 73.6MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-09 01:14:18,549 INFO L158 Benchmark]: Boogie Preprocessor took 88.43ms. Allocated memory is still 151.0MB. Free memory was 73.6MB in the beginning and 69.0MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 01:14:18,550 INFO L158 Benchmark]: RCFGBuilder took 2524.76ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 69.0MB in the beginning and 118.6MB in the end (delta: -49.6MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. [2024-11-09 01:14:18,550 INFO L158 Benchmark]: TraceAbstraction took 10744.63ms. Allocated memory was 203.4MB in the beginning and 295.7MB in the end (delta: 92.3MB). Free memory was 117.6MB in the beginning and 142.9MB in the end (delta: -25.3MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. [2024-11-09 01:14:18,551 INFO L158 Benchmark]: Witness Printer took 210.70ms. Allocated memory is still 295.7MB. Free memory was 142.9MB in the beginning and 130.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 01:14:18,553 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 151.0MB. Free memory is still 117.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 936.61ms. Allocated memory is still 151.0MB. Free memory was 108.8MB in the beginning and 79.0MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 120.21ms. Allocated memory is still 151.0MB. Free memory was 79.0MB in the beginning and 73.6MB in the end (delta: 5.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 88.43ms. Allocated memory is still 151.0MB. Free memory was 73.6MB in the beginning and 69.0MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2524.76ms. Allocated memory was 151.0MB in the beginning and 203.4MB in the end (delta: 52.4MB). Free memory was 69.0MB in the beginning and 118.6MB in the end (delta: -49.6MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. * TraceAbstraction took 10744.63ms. Allocated memory was 203.4MB in the beginning and 295.7MB in the end (delta: 92.3MB). Free memory was 117.6MB in the beginning and 142.9MB in the end (delta: -25.3MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. * Witness Printer took 210.70ms. Allocated memory is still 295.7MB. Free memory was 142.9MB in the beginning and 130.3MB 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: 509]: 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, 85 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.4s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 417 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 417 mSDsluCounter, 372 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27 mSDsCounter, 408 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1714 IncrementalHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 408 mSolverCounterUnsat, 345 mSDtfsCounter, 1714 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 409 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=883occurred in iteration=5, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 162 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 1283 NumberOfCodeBlocks, 1283 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1272 ConstructedInterpolants, 0 QuantifiedInterpolants, 4716 SizeOfPredicates, 0 NumberOfNonLiveVariables, 899 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 618/650 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: 616]: Loop Invariant Derived loop invariant: ((((((a17 == 8) && (a28 <= 10)) || ((a28 == 10) && (a17 <= 8))) || ((a17 == 8) && (a19 == 1))) || ((((a25 == a11) && (9 <= a28)) && (a17 <= 8)) && (a28 <= 10))) || ((((a25 == a11) && (a17 <= 8)) && (a19 == 1)) && (a28 <= 7))) RESULT: Ultimate proved your program to be correct! [2024-11-09 01:14:18,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2f00cff-cb9a-43a8-933e-dd6d7d2c6fba/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE