./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91 --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 d1799d95d0e216b78a87282e1c07d247f4f74dae2fd2ab1bbf062b2cf09b9c7c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:19:55,507 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:19:55,630 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:19:55,646 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:19:55,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:19:55,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:19:55,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:19:55,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:19:55,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:19:55,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:19:55,695 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:19:55,696 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:19:55,696 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:19:55,698 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:19:55,699 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:19:55,699 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:19:55,700 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:19:55,700 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:19:55,700 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:19:55,701 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:19:55,702 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:19:55,702 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:19:55,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:19:55,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:19:55,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:19:55,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:19:55,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:19:55,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:19:55,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:19:55,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:19:55,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:19:55,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:19:55,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:19:55,710 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:19:55,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:19:55,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:19:55,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:19:55,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:55,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:19:55,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:19:55,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:19:55,713 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:19:55,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:19:55,713 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:19:55,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:19:55,714 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:19:55,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:19:55,715 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_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1799d95d0e216b78a87282e1c07d247f4f74dae2fd2ab1bbf062b2cf09b9c7c [2023-11-24 23:19:56,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:19:56,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:19:56,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:19:56,114 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:19:56,114 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:19:56,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c [2023-11-24 23:19:59,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:20:00,142 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:20:00,143 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c [2023-11-24 23:20:00,220 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/data/b0d169804/3e4123bdbf0746878ac9345f2d0d52a1/FLAG13f6e78ec [2023-11-24 23:20:00,238 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/data/b0d169804/3e4123bdbf0746878ac9345f2d0d52a1 [2023-11-24 23:20:00,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:20:00,242 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:20:00,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:20:00,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:20:00,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:20:00,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:20:00" (1/1) ... [2023-11-24 23:20:00,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a81f636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:00, skipping insertion in model container [2023-11-24 23:20:00,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:20:00" (1/1) ... [2023-11-24 23:20:00,562 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:20:03,081 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[375709,375722] [2023-11-24 23:20:03,123 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[383339,383352] [2023-11-24 23:20:03,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:20:03,482 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:20:04,683 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[375709,375722] [2023-11-24 23:20:04,697 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/sv-benchmarks/c/combinations/Problem05_label48+token_ring.09.cil-1.c[383339,383352] [2023-11-24 23:20:04,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:20:04,842 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:20:04,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04 WrapperNode [2023-11-24 23:20:04,843 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:20:04,845 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:20:04,845 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:20:04,845 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:20:04,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:04,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:05,423 INFO L138 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13048 [2023-11-24 23:20:05,423 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:20:05,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:20:05,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:20:05,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:20:05,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:05,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:05,503 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:05,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:05,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:05,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:05,981 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:06,020 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:06,192 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:20:06,193 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:20:06,193 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:20:06,193 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:20:06,194 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (1/1) ... [2023-11-24 23:20:06,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:20:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:06,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:20:06,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:20:06,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:20:06,449 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:20:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:20:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:20:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:20:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:20:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:20:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:20:06,451 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:20:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:20:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:20:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:20:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:20:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:20:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:20:06,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:20:06,618 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:20:06,620 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:20:16,770 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:20:19,673 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:20:19,675 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-24 23:20:19,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:19 BoogieIcfgContainer [2023-11-24 23:20:19,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:20:19,684 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:20:19,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:20:19,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:20:19,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:20:00" (1/3) ... [2023-11-24 23:20:19,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599da811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:19, skipping insertion in model container [2023-11-24 23:20:19,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:20:04" (2/3) ... [2023-11-24 23:20:19,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599da811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:19, skipping insertion in model container [2023-11-24 23:20:19,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:19" (3/3) ... [2023-11-24 23:20:19,702 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label48+token_ring.09.cil-1.c [2023-11-24 23:20:19,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:20:19,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 23:20:19,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:20:19,849 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d967c09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:20:19,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 23:20:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-24 23:20:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-24 23:20:19,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:19,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:20:19,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:19,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash -432629509, now seen corresponding path program 1 times [2023-11-24 23:20:19,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787299954] [2023-11-24 23:20:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:19,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:20,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:20,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787299954] [2023-11-24 23:20:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787299954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:20,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:20,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:20:20,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695885190] [2023-11-24 23:20:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:20,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:20:20,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:20,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:20:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:20:20,654 INFO L87 Difference]: Start difference. First operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:20:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:21,933 INFO L93 Difference]: Finished difference Result 3764 states and 7289 transitions. [2023-11-24 23:20:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:20:21,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2023-11-24 23:20:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:21,974 INFO L225 Difference]: With dead ends: 3764 [2023-11-24 23:20:21,974 INFO L226 Difference]: Without dead ends: 1955 [2023-11-24 23:20:21,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:20:21,993 INFO L413 NwaCegarLoop]: 3441 mSDtfsCounter, 3700 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 6796 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:21,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 6796 Invalid, 692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:20:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2023-11-24 23:20:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1954. [2023-11-24 23:20:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1898 states have (on average 1.9199157007376186) internal successors, (3644), 1901 states have internal predecessors, (3644), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-24 23:20:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3728 transitions. [2023-11-24 23:20:22,246 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3728 transitions. Word has length 58 [2023-11-24 23:20:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:22,247 INFO L495 AbstractCegarLoop]: Abstraction has 1954 states and 3728 transitions. [2023-11-24 23:20:22,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:20:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3728 transitions. [2023-11-24 23:20:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:20:22,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:22,258 INFO L195 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, 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] [2023-11-24 23:20:22,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:20:22,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:22,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1103456031, now seen corresponding path program 1 times [2023-11-24 23:20:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:22,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907350201] [2023-11-24 23:20:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:22,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:22,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907350201] [2023-11-24 23:20:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907350201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:22,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807854017] [2023-11-24 23:20:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:22,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:22,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:22,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:22,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:20:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:23,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:23,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:20:23,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807854017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:23,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:23,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263494581] [2023-11-24 23:20:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:23,175 INFO L87 Difference]: Start difference. First operand 1954 states and 3728 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:23,870 INFO L93 Difference]: Finished difference Result 2563 states and 4645 transitions. [2023-11-24 23:20:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:23,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:20:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:23,896 INFO L225 Difference]: With dead ends: 2563 [2023-11-24 23:20:23,896 INFO L226 Difference]: Without dead ends: 2255 [2023-11-24 23:20:23,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:23,903 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3463 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:23,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3491 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:20:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2023-11-24 23:20:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2251. [2023-11-24 23:20:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2147 states have (on average 1.8653935724266417) internal successors, (4005), 2151 states have internal predecessors, (4005), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-24 23:20:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 4161 transitions. [2023-11-24 23:20:24,034 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 4161 transitions. Word has length 116 [2023-11-24 23:20:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:24,035 INFO L495 AbstractCegarLoop]: Abstraction has 2251 states and 4161 transitions. [2023-11-24 23:20:24,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 4161 transitions. [2023-11-24 23:20:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:20:24,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:24,041 INFO L195 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, 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] [2023-11-24 23:20:24,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:24,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:24,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:24,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:24,251 INFO L85 PathProgramCache]: Analyzing trace with hash -230840867, now seen corresponding path program 1 times [2023-11-24 23:20:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:24,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538126902] [2023-11-24 23:20:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:24,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:24,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538126902] [2023-11-24 23:20:24,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538126902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:24,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128707068] [2023-11-24 23:20:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:24,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:24,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:24,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:24,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:20:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:24,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:24,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 23:20:24,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:24,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128707068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:24,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:24,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:24,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535612077] [2023-11-24 23:20:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:24,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:24,891 INFO L87 Difference]: Start difference. First operand 2251 states and 4161 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:25,602 INFO L93 Difference]: Finished difference Result 3448 states and 5956 transitions. [2023-11-24 23:20:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:25,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:20:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:25,626 INFO L225 Difference]: With dead ends: 3448 [2023-11-24 23:20:25,626 INFO L226 Difference]: Without dead ends: 2843 [2023-11-24 23:20:25,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:25,632 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3481 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:25,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3481 Valid, 3489 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2023-11-24 23:20:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2837. [2023-11-24 23:20:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2639 states have (on average 1.786661614247821) internal successors, (4715), 2645 states have internal predecessors, (4715), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-24 23:20:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 5011 transitions. [2023-11-24 23:20:25,768 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 5011 transitions. Word has length 116 [2023-11-24 23:20:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:25,768 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 5011 transitions. [2023-11-24 23:20:25,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 5011 transitions. [2023-11-24 23:20:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:20:25,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:25,775 INFO L195 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, 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] [2023-11-24 23:20:25,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 23:20:25,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:25,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:25,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:25,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1557590299, now seen corresponding path program 1 times [2023-11-24 23:20:25,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:25,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934323777] [2023-11-24 23:20:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:25,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:26,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:26,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934323777] [2023-11-24 23:20:26,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934323777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:26,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557362913] [2023-11-24 23:20:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:26,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:26,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:26,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:26,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:20:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:26,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:26,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 23:20:26,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:26,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557362913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:26,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:26,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729131064] [2023-11-24 23:20:26,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:26,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:26,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:26,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:26,563 INFO L87 Difference]: Start difference. First operand 2837 states and 5011 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:27,522 INFO L93 Difference]: Finished difference Result 5194 states and 8528 transitions. [2023-11-24 23:20:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:27,523 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:20:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:27,559 INFO L225 Difference]: With dead ends: 5194 [2023-11-24 23:20:27,560 INFO L226 Difference]: Without dead ends: 4003 [2023-11-24 23:20:27,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:27,567 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3475 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:27,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3475 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:20:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2023-11-24 23:20:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3993. [2023-11-24 23:20:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3611 states have (on average 1.6923289947382996) internal successors, (6111), 3621 states have internal predecessors, (6111), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-24 23:20:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 6679 transitions. [2023-11-24 23:20:27,792 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 6679 transitions. Word has length 116 [2023-11-24 23:20:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:27,792 INFO L495 AbstractCegarLoop]: Abstraction has 3993 states and 6679 transitions. [2023-11-24 23:20:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 6679 transitions. [2023-11-24 23:20:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:20:27,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:27,801 INFO L195 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, 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] [2023-11-24 23:20:27,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:28,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:28,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:28,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash -635370791, now seen corresponding path program 1 times [2023-11-24 23:20:28,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:28,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256035290] [2023-11-24 23:20:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:28,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:28,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256035290] [2023-11-24 23:20:28,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256035290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:28,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294497053] [2023-11-24 23:20:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:28,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:28,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:28,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:20:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:28,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:28,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-24 23:20:28,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:28,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294497053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:28,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:28,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:28,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672862192] [2023-11-24 23:20:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:28,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:28,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:28,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:28,621 INFO L87 Difference]: Start difference. First operand 3993 states and 6679 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:29,457 INFO L93 Difference]: Finished difference Result 8638 states and 13572 transitions. [2023-11-24 23:20:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:20:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:29,510 INFO L225 Difference]: With dead ends: 8638 [2023-11-24 23:20:29,510 INFO L226 Difference]: Without dead ends: 6291 [2023-11-24 23:20:29,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:29,524 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3484 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3484 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:29,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3484 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2023-11-24 23:20:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 6273. [2023-11-24 23:20:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5531 states have (on average 1.6009763153136864) internal successors, (8855), 5549 states have internal predecessors, (8855), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2023-11-24 23:20:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9951 transitions. [2023-11-24 23:20:29,840 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9951 transitions. Word has length 116 [2023-11-24 23:20:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:29,840 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9951 transitions. [2023-11-24 23:20:29,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9951 transitions. [2023-11-24 23:20:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:20:29,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:29,857 INFO L195 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, 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] [2023-11-24 23:20:29,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:30,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:30,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:30,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:30,066 INFO L85 PathProgramCache]: Analyzing trace with hash -551811365, now seen corresponding path program 1 times [2023-11-24 23:20:30,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:30,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049921441] [2023-11-24 23:20:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:30,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:30,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049921441] [2023-11-24 23:20:30,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049921441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892260945] [2023-11-24 23:20:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:30,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:30,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:20:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:30,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:30,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:20:30,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:30,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892260945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:30,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:30,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:30,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297635090] [2023-11-24 23:20:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:30,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:30,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:30,605 INFO L87 Difference]: Start difference. First operand 6273 states and 9951 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:31,474 INFO L93 Difference]: Finished difference Result 15430 states and 23460 transitions. [2023-11-24 23:20:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:20:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:31,582 INFO L225 Difference]: With dead ends: 15430 [2023-11-24 23:20:31,582 INFO L226 Difference]: Without dead ends: 10803 [2023-11-24 23:20:31,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:31,606 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3469 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:31,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3469 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:20:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10803 states. [2023-11-24 23:20:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10803 to 10769. [2023-11-24 23:20:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10769 states, 9323 states have (on average 1.5281561729057171) internal successors, (14247), 9357 states have internal predecessors, (14247), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2023-11-24 23:20:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10769 states to 10769 states and 16367 transitions. [2023-11-24 23:20:32,462 INFO L78 Accepts]: Start accepts. Automaton has 10769 states and 16367 transitions. Word has length 116 [2023-11-24 23:20:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:32,463 INFO L495 AbstractCegarLoop]: Abstraction has 10769 states and 16367 transitions. [2023-11-24 23:20:32,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 10769 states and 16367 transitions. [2023-11-24 23:20:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:20:32,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:32,491 INFO L195 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, 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] [2023-11-24 23:20:32,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:32,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545d42b2-902c-41fd-9ed3-435d7fbe5166/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:20:32,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:32,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1523433241, now seen corresponding path program 1 times [2023-11-24 23:20:32,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:32,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138689748] [2023-11-24 23:20:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:32,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-24 23:20:32,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:32,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138689748] [2023-11-24 23:20:32,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138689748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:32,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:32,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594668470] [2023-11-24 23:20:32,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:32,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:32,935 INFO L87 Difference]: Start difference. First operand 10769 states and 16367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:20:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:34,135 INFO L93 Difference]: Finished difference Result 18003 states and 27056 transitions. [2023-11-24 23:20:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:34,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-11-24 23:20:34,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:34,197 INFO L225 Difference]: With dead ends: 18003 [2023-11-24 23:20:34,197 INFO L226 Difference]: Without dead ends: 13361 [2023-11-24 23:20:34,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:34,219 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 109 mSDsluCounter, 3264 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6632 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:34,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6632 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13361 states. [2023-11-24 23:20:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13361 to 12673. [2023-11-24 23:20:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12673 states, 11163 states have (on average 1.5399982083669264) internal successors, (17191), 11197 states have internal predecessors, (17191), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2023-11-24 23:20:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12673 states to 12673 states and 19375 transitions. [2023-11-24 23:20:34,859 INFO L78 Accepts]: Start accepts. Automaton has 12673 states and 19375 transitions. Word has length 116 [2023-11-24 23:20:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:34,860 INFO L495 AbstractCegarLoop]: Abstraction has 12673 states and 19375 transitions. [2023-11-24 23:20:34,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:20:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 12673 states and 19375 transitions. [2023-11-24 23:20:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-24 23:20:34,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:34,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-24 23:20:34,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:20:34,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:34,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -95596423, now seen corresponding path program 1 times [2023-11-24 23:20:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:34,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924411249] [2023-11-24 23:20:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-24 23:20:35,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:35,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924411249] [2023-11-24 23:20:35,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924411249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:35,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979415169] [2023-11-24 23:20:35,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:35,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:35,121 INFO L87 Difference]: Start difference. First operand 12673 states and 19375 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:20:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:36,434 INFO L93 Difference]: Finished difference Result 34438 states and 51668 transitions. [2023-11-24 23:20:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-11-24 23:20:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:36,538 INFO L225 Difference]: With dead ends: 34438 [2023-11-24 23:20:36,538 INFO L226 Difference]: Without dead ends: 23411 [2023-11-24 23:20:36,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:36,579 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3470 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3470 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:36,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3470 Valid, 3446 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:20:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23411 states. [2023-11-24 23:20:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23411 to 23313. [2023-11-24 23:20:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23313 states, 20363 states have (on average 1.4963905122035064) internal successors, (30471), 20429 states have internal predecessors, (30471), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2023-11-24 23:20:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23313 states to 23313 states and 34703 transitions. [2023-11-24 23:20:37,788 INFO L78 Accepts]: Start accepts. Automaton has 23313 states and 34703 transitions. Word has length 158 [2023-11-24 23:20:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:37,789 INFO L495 AbstractCegarLoop]: Abstraction has 23313 states and 34703 transitions. [2023-11-24 23:20:37,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:20:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23313 states and 34703 transitions. [2023-11-24 23:20:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-24 23:20:37,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:37,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-24 23:20:37,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:20:37,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:37,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash -382957950, now seen corresponding path program 1 times [2023-11-24 23:20:37,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:37,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835973643] [2023-11-24 23:20:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-24 23:20:38,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835973643] [2023-11-24 23:20:38,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835973643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:38,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623626665] [2023-11-24 23:20:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:38,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:38,006 INFO L87 Difference]: Start difference. First operand 23313 states and 34703 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:20:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:40,253 INFO L93 Difference]: Finished difference Result 66070 states and 97684 transitions. [2023-11-24 23:20:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:40,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-11-24 23:20:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted.