./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/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_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/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_266aac26-94ac-4cb6-b9e3-70e788be6519/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 3bd63f2e85879a3b5cd3d111848f55574da866e1b794c0e510a03ddd791b817a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:54:13,887 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:54:14,007 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:54:14,020 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:54:14,022 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:54:14,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:54:14,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:54:14,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:54:14,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:54:14,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:54:14,068 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:54:14,069 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:54:14,069 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:54:14,071 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:54:14,071 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:54:14,072 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:54:14,072 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:54:14,073 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:54:14,073 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:54:14,074 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:54:14,074 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:54:14,075 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:54:14,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:54:14,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:54:14,077 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:54:14,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:54:14,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:54:14,079 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:54:14,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:54:14,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:54:14,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:54:14,081 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:54:14,082 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:54:14,082 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:54:14,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:54:14,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:54:14,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:54:14,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:54:14,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:54:14,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:54:14,084 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:54:14,085 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:54:14,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:54:14,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:54:14,086 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:54:14,086 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:54:14,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:54:14,087 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_266aac26-94ac-4cb6-b9e3-70e788be6519/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bd63f2e85879a3b5cd3d111848f55574da866e1b794c0e510a03ddd791b817a [2023-11-24 23:54:14,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:54:14,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:54:14,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:54:14,384 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:54:14,385 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:54:14,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c [2023-11-24 23:54:17,578 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:54:18,333 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:54:18,334 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c [2023-11-24 23:54:18,384 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/data/216042575/81613a2180ca49ff9986b811859e413d/FLAG7261f78cf [2023-11-24 23:54:18,399 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/data/216042575/81613a2180ca49ff9986b811859e413d [2023-11-24 23:54:18,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:54:18,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:54:18,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:54:18,412 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:54:18,418 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:54:18,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:54:18" (1/1) ... [2023-11-24 23:54:18,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667024c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:18, skipping insertion in model container [2023-11-24 23:54:18,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:54:18" (1/1) ... [2023-11-24 23:54:18,723 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:54:21,084 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_266aac26-94ac-4cb6-b9e3-70e788be6519/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[377340,377353] [2023-11-24 23:54:21,121 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_266aac26-94ac-4cb6-b9e3-70e788be6519/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[383339,383352] [2023-11-24 23:54:21,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:54:21,464 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:54:22,768 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_266aac26-94ac-4cb6-b9e3-70e788be6519/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[377340,377353] [2023-11-24 23:54:22,788 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_266aac26-94ac-4cb6-b9e3-70e788be6519/sv-benchmarks/c/combinations/Problem05_label44+token_ring.10.cil-2.c[383339,383352] [2023-11-24 23:54:22,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:54:22,911 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:54:22,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22 WrapperNode [2023-11-24 23:54:22,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:54:22,913 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:54:22,913 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:54:22,914 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:54:22,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:23,021 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:23,531 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13108 [2023-11-24 23:54:23,532 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:54:23,533 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:54:23,533 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:54:23,534 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:54:23,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:23,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:23,585 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:23,585 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:23,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:24,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:24,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:24,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:24,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:54:24,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:54:24,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:54:24,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:54:24,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (1/1) ... [2023-11-24 23:54:24,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:54:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:24,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:54:24,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:54:24,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:54:24,441 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:54:24,441 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:54:24,441 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:54:24,441 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:54:24,441 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:54:24,442 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:54:24,442 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:54:24,442 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:54:24,442 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:54:24,443 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:54:24,443 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:54:24,443 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:54:24,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:54:24,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:54:24,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:54:24,656 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:54:24,659 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:54:34,848 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:54:37,962 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:54:37,962 INFO L309 CfgBuilder]: Removed 14 assume(true) statements. [2023-11-24 23:54:37,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:54:37 BoogieIcfgContainer [2023-11-24 23:54:37,965 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:54:37,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:54:37,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:54:37,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:54:37,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:54:18" (1/3) ... [2023-11-24 23:54:37,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6ec8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:54:37, skipping insertion in model container [2023-11-24 23:54:37,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:22" (2/3) ... [2023-11-24 23:54:37,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6ec8ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:54:37, skipping insertion in model container [2023-11-24 23:54:37,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:54:37" (3/3) ... [2023-11-24 23:54:37,976 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.10.cil-2.c [2023-11-24 23:54:37,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:54:37,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 23:54:38,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:54:38,110 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;@18649e76, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:54:38,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 23:54:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1787 states have (on average 1.9541130386121992) internal successors, (3492), 1790 states have internal predecessors, (3492), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-24 23:54:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 23:54:38,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:38,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:54:38,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:38,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash 548283999, now seen corresponding path program 1 times [2023-11-24 23:54:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:38,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345754647] [2023-11-24 23:54:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:38,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:38,775 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 23:54:38,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:38,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345754647] [2023-11-24 23:54:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345754647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:38,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:54:38,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:54:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233419434] [2023-11-24 23:54:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:54:38,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:38,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:54:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:54:38,840 INFO L87 Difference]: Start difference. First operand has 1820 states, 1787 states have (on average 1.9541130386121992) internal successors, (3492), 1790 states have internal predecessors, (3492), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 23:54:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:39,968 INFO L93 Difference]: Finished difference Result 3800 states and 7348 transitions. [2023-11-24 23:54:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:54:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 61 [2023-11-24 23:54:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:40,013 INFO L225 Difference]: With dead ends: 3800 [2023-11-24 23:54:40,014 INFO L226 Difference]: Without dead ends: 1979 [2023-11-24 23:54:40,023 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 23:54:40,026 INFO L413 NwaCegarLoop]: 3473 mSDtfsCounter, 3735 mSDsluCounter, 3383 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3735 SdHoareTripleChecker+Valid, 6856 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:40,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3735 Valid, 6856 Invalid, 708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:54:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2023-11-24 23:54:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2023-11-24 23:54:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1920 states have (on average 1.915625) internal successors, (3678), 1923 states have internal predecessors, (3678), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-24 23:54:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3766 transitions. [2023-11-24 23:54:40,197 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3766 transitions. Word has length 61 [2023-11-24 23:54:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:40,198 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3766 transitions. [2023-11-24 23:54:40,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 23:54:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3766 transitions. [2023-11-24 23:54:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:54:40,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:40,215 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, 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] [2023-11-24 23:54:40,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:54:40,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:40,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 410780466, now seen corresponding path program 1 times [2023-11-24 23:54:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:40,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071596369] [2023-11-24 23:54:40,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:40,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:54:40,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071596369] [2023-11-24 23:54:40,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071596369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:40,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245163054] [2023-11-24 23:54:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:40,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:40,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:40,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:40,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:54:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:40,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:54:40,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 23:54:41,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:41,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245163054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:41,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:41,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:54:41,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59173415] [2023-11-24 23:54:41,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:41,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:54:41,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:54:41,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:54:41,054 INFO L87 Difference]: Start difference. First operand 1978 states and 3766 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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 23:54:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:41,671 INFO L93 Difference]: Finished difference Result 2635 states and 4761 transitions. [2023-11-24 23:54:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:54:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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 123 [2023-11-24 23:54:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:41,693 INFO L225 Difference]: With dead ends: 2635 [2023-11-24 23:54:41,693 INFO L226 Difference]: Without dead ends: 2303 [2023-11-24 23:54:41,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 23:54:41,698 INFO L413 NwaCegarLoop]: 3319 mSDtfsCounter, 3482 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:41,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 3525 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:54:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2023-11-24 23:54:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2023-11-24 23:54:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2191 states have (on average 1.8589685075308078) internal successors, (4073), 2195 states have internal predecessors, (4073), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-24 23:54:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4237 transitions. [2023-11-24 23:54:41,817 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4237 transitions. Word has length 123 [2023-11-24 23:54:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:41,819 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 4237 transitions. [2023-11-24 23:54:41,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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 23:54:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4237 transitions. [2023-11-24 23:54:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:54:41,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:41,829 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, 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] [2023-11-24 23:54:41,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:42,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:42,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1859910866, now seen corresponding path program 1 times [2023-11-24 23:54:42,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:42,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852854226] [2023-11-24 23:54:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:54:42,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:42,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852854226] [2023-11-24 23:54:42,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852854226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:42,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828057186] [2023-11-24 23:54:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:42,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:42,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:42,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:42,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:54:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:42,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:54:42,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-24 23:54:42,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:42,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828057186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:42,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:42,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:54:42,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552374045] [2023-11-24 23:54:42,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:42,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:54:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:54:42,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:54:42,665 INFO L87 Difference]: Start difference. First operand 2299 states and 4237 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 23:54:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:43,335 INFO L93 Difference]: Finished difference Result 3592 states and 6188 transitions. [2023-11-24 23:54:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:54:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 123 [2023-11-24 23:54:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:43,361 INFO L225 Difference]: With dead ends: 3592 [2023-11-24 23:54:43,362 INFO L226 Difference]: Without dead ends: 2939 [2023-11-24 23:54:43,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 23:54:43,371 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3500 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3505 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:43,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 3505 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:54:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2023-11-24 23:54:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2023-11-24 23:54:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2727 states have (on average 1.778877887788779) internal successors, (4851), 2733 states have internal predecessors, (4851), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-24 23:54:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5163 transitions. [2023-11-24 23:54:43,549 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5163 transitions. Word has length 123 [2023-11-24 23:54:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:43,550 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 5163 transitions. [2023-11-24 23:54:43,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 23:54:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5163 transitions. [2023-11-24 23:54:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:54:43,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:43,557 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, 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] [2023-11-24 23:54:43,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 23:54:43,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:43,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:43,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash -821244302, now seen corresponding path program 1 times [2023-11-24 23:54:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:43,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137564067] [2023-11-24 23:54:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:54:44,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:44,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137564067] [2023-11-24 23:54:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137564067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314304175] [2023-11-24 23:54:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:44,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:44,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:54:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:44,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:54:44,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-24 23:54:44,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:44,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314304175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:44,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:44,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:54:44,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565699288] [2023-11-24 23:54:44,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:44,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:54:44,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:54:44,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:54:44,362 INFO L87 Difference]: Start difference. First operand 2933 states and 5163 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 23:54:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:45,055 INFO L93 Difference]: Finished difference Result 5482 states and 8992 transitions. [2023-11-24 23:54:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:54:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 123 [2023-11-24 23:54:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:45,087 INFO L225 Difference]: With dead ends: 5482 [2023-11-24 23:54:45,088 INFO L226 Difference]: Without dead ends: 4195 [2023-11-24 23:54:45,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 23:54:45,097 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 3494 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3494 SdHoareTripleChecker+Valid, 3494 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:45,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3494 Valid, 3494 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:54:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2023-11-24 23:54:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2023-11-24 23:54:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3787 states have (on average 1.6855030367045154) internal successors, (6383), 3797 states have internal predecessors, (6383), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2023-11-24 23:54:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6983 transitions. [2023-11-24 23:54:45,335 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6983 transitions. Word has length 123 [2023-11-24 23:54:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:45,337 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 6983 transitions. [2023-11-24 23:54:45,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 23:54:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6983 transitions. [2023-11-24 23:54:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:54:45,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:45,348 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, 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] [2023-11-24 23:54:45,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:45,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:45,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:45,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 304306194, now seen corresponding path program 1 times [2023-11-24 23:54:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869838036] [2023-11-24 23:54:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:54:45,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:45,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869838036] [2023-11-24 23:54:45,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869838036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:45,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063974974] [2023-11-24 23:54:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:45,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:45,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:45,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:45,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:54:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:46,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:54:46,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-24 23:54:46,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:46,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063974974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:46,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:46,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:54:46,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866676384] [2023-11-24 23:54:46,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:46,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:54:46,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:46,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:54:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:54:46,096 INFO L87 Difference]: Start difference. First operand 4185 states and 6983 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 23:54:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:46,847 INFO L93 Difference]: Finished difference Result 9214 states and 14500 transitions. [2023-11-24 23:54:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:54:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 123 [2023-11-24 23:54:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:46,898 INFO L225 Difference]: With dead ends: 9214 [2023-11-24 23:54:46,898 INFO L226 Difference]: Without dead ends: 6675 [2023-11-24 23:54:46,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 23:54:46,917 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 3503 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3519 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:46,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3519 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:54:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2023-11-24 23:54:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2023-11-24 23:54:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5883 states have (on average 1.5976542580316164) internal successors, (9399), 5901 states have internal predecessors, (9399), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-24 23:54:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10559 transitions. [2023-11-24 23:54:47,394 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10559 transitions. Word has length 123 [2023-11-24 23:54:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:47,395 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 10559 transitions. [2023-11-24 23:54:47,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 23:54:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10559 transitions. [2023-11-24 23:54:47,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:54:47,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:47,407 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, 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] [2023-11-24 23:54:47,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:47,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:47,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -482499982, now seen corresponding path program 1 times [2023-11-24 23:54:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289694479] [2023-11-24 23:54:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:54:47,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:47,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289694479] [2023-11-24 23:54:47,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289694479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:47,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145507722] [2023-11-24 23:54:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:47,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:47,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:47,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:47,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:54:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:48,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:54:48,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:54:48,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:54:48,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145507722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:48,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:54:48,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:54:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763423365] [2023-11-24 23:54:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:48,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:54:48,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:48,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:54:48,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:54:48,141 INFO L87 Difference]: Start difference. First operand 6657 states and 10559 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 23:54:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:48,920 INFO L93 Difference]: Finished difference Result 16582 states and 25316 transitions. [2023-11-24 23:54:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:54:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 123 [2023-11-24 23:54:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:48,989 INFO L225 Difference]: With dead ends: 16582 [2023-11-24 23:54:48,989 INFO L226 Difference]: Without dead ends: 11571 [2023-11-24 23:54:49,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 23:54:49,014 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3488 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3488 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:49,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3488 Valid, 3476 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:54:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2023-11-24 23:54:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2023-11-24 23:54:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 10027 states have (on average 1.5293706991123965) internal successors, (15335), 10061 states have internal predecessors, (15335), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2023-11-24 23:54:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 17583 transitions. [2023-11-24 23:54:49,515 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 17583 transitions. Word has length 123 [2023-11-24 23:54:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:49,516 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 17583 transitions. [2023-11-24 23:54:49,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 23:54:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 17583 transitions. [2023-11-24 23:54:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 23:54:49,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:49,540 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, 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] [2023-11-24 23:54:49,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:49,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_266aac26-94ac-4cb6-b9e3-70e788be6519/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:49,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:49,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1243356142, now seen corresponding path program 1 times [2023-11-24 23:54:49,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:49,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408888983] [2023-11-24 23:54:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:49,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-24 23:54:50,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:50,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408888983] [2023-11-24 23:54:50,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408888983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:50,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:54:50,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:54:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713823851] [2023-11-24 23:54:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:50,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:54:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:54:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:54:50,605 INFO L87 Difference]: Start difference. First operand 11537 states and 17583 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-24 23:54:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:52,400 INFO L93 Difference]: Finished difference Result 26773 states and 39857 transitions. [2023-11-24 23:54:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:54:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2023-11-24 23:54:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:52,477 INFO L225 Difference]: With dead ends: 26773 [2023-11-24 23:54:52,477 INFO L226 Difference]: Without dead ends: 16883 [2023-11-24 23:54:52,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:54:52,511 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3956 mSDsluCounter, 9688 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 12962 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:52,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3962 Valid, 12962 Invalid, 1282 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [110 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 23:54:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16883 states. [2023-11-24 23:54:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16883 to 16353. [2023-11-24 23:54:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16353 states, 14107 states have (on average 1.4987594811086695) internal successors, (21143), 14157 states have internal predecessors, (21143), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2023-11-24 23:54:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16353 states to 16353 states and 24479 transitions. [2023-11-24 23:54:53,436 INFO L78 Accepts]: Start accepts. Automaton has 16353 states and 24479 transitions. Word has length 123 [2023-11-24 23:54:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:53,436 INFO L495 AbstractCegarLoop]: Abstraction has 16353 states and 24479 transitions. [2023-11-24 23:54:53,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-24 23:54:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16353 states and 24479 transitions. [2023-11-24 23:54:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-24 23:54:53,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:53,469 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, 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] [2023-11-24 23:54:53,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:54:53,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:53,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1474945001, now seen corresponding path program 1 times [2023-11-24 23:54:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229714165] [2023-11-24 23:54:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:53,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-24 23:54:54,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229714165] [2023-11-24 23:54:54,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229714165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:54:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:54:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109473190] [2023-11-24 23:54:54,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:54:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:54,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:54:54,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:54:54,227 INFO L87 Difference]: Start difference. First operand 16353 states and 24479 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-24 23:54:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:56,628 INFO L93 Difference]: Finished difference Result 46389 states and 68305 transitions. [2023-11-24 23:54:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:54:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2023-11-24 23:54:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:56,813 INFO L225 Difference]: With dead ends: 46389 [2023-11-24 23:54:56,814 INFO L226 Difference]: Without dead ends: 31683 [2023-11-24 23:54:56,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:54:56,879 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3975 mSDsluCounter, 6475 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3994 SdHoareTripleChecker+Valid, 9730 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:56,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3994 Valid, 9730 Invalid, 999 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [129 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:54:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31683 states. [2023-11-24 23:54:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31683 to 30481. [2023-11-24 23:54:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30481 states, 26091 states have (on average 1.4622283546050363) internal successors, (38151), 26189 states have internal predecessors, (38151), 3236 states have call successors, (3236), 1152 states have call predecessors, (3236), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236)