./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/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_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/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_5c251675-ffab-46d9-84df-4b2394388205/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 d46cc80a8d21eeff79ba02488456fda09c76eb75ff8eedd6b93124365a06d1f9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:18:44,436 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:18:44,552 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:18:44,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:18:44,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:18:44,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:18:44,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:18:44,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:18:44,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:18:44,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:18:44,622 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:18:44,623 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:18:44,623 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:18:44,625 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:18:44,625 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:18:44,626 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:18:44,626 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:18:44,626 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:18:44,627 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:18:44,627 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:18:44,628 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:18:44,629 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:18:44,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:18:44,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:18:44,631 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:18:44,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:18:44,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:18:44,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:18:44,632 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:18:44,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:18:44,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:18:44,634 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:18:44,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:18:44,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:18:44,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:18:44,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:18:44,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:18:44,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:18:44,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:18:44,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:18:44,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:18:44,638 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:18:44,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:18:44,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:18:44,639 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:18:44,639 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:18:44,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:18:44,640 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_5c251675-ffab-46d9-84df-4b2394388205/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d46cc80a8d21eeff79ba02488456fda09c76eb75ff8eedd6b93124365a06d1f9 [2023-11-24 23:18:44,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:18:44,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:18:44,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:18:44,954 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:18:44,955 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:18:44,956 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c [2023-11-24 23:18:48,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:18:48,925 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:18:48,927 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c [2023-11-24 23:18:48,996 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/data/f42b33533/164209310e9d415e992782d2544ca517/FLAGef032ebd5 [2023-11-24 23:18:49,011 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/data/f42b33533/164209310e9d415e992782d2544ca517 [2023-11-24 23:18:49,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:18:49,019 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:18:49,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:18:49,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:18:49,029 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:18:49,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:18:49" (1/1) ... [2023-11-24 23:18:49,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff771e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:49, skipping insertion in model container [2023-11-24 23:18:49,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:18:49" (1/1) ... [2023-11-24 23:18:49,370 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:18:51,543 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_5c251675-ffab-46d9-84df-4b2394388205/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[377612,377625] [2023-11-24 23:18:51,582 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_5c251675-ffab-46d9-84df-4b2394388205/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[383339,383352] [2023-11-24 23:18:51,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:18:51,926 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:18:53,248 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_5c251675-ffab-46d9-84df-4b2394388205/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[377612,377625] [2023-11-24 23:18:53,260 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_5c251675-ffab-46d9-84df-4b2394388205/sv-benchmarks/c/combinations/Problem05_label47+token_ring.09.cil-1.c[383339,383352] [2023-11-24 23:18:53,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:18:53,388 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:18:53,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53 WrapperNode [2023-11-24 23:18:53,389 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:18:53,390 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:18:53,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:18:53,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:18:53,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:53,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:53,962 INFO L138 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13048 [2023-11-24 23:18:53,963 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:18:53,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:18:53,964 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:18:53,964 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:18:53,973 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:53,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,303 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,574 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:18:54,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:18:54,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:18:54,725 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:18:54,726 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (1/1) ... [2023-11-24 23:18:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:18:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:18:54,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:18:54,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:18:54,830 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:18:54,830 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:18:54,830 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:18:54,830 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:18:54,831 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:18:54,831 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:18:54,831 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:18:54,831 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:18:54,831 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:18:54,832 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:18:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:18:54,832 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:18:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:18:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:18:54,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:18:54,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:18:55,019 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:18:55,021 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:19:05,560 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:19:08,633 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:19:08,633 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-24 23:19:08,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:08 BoogieIcfgContainer [2023-11-24 23:19:08,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:19:08,641 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:19:08,641 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:19:08,645 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:19:08,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:18:49" (1/3) ... [2023-11-24 23:19:08,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1722d92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:08, skipping insertion in model container [2023-11-24 23:19:08,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:53" (2/3) ... [2023-11-24 23:19:08,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1722d92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:08, skipping insertion in model container [2023-11-24 23:19:08,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:08" (3/3) ... [2023-11-24 23:19:08,650 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.09.cil-1.c [2023-11-24 23:19:08,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:19:08,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 23:19:08,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:19:08,832 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;@53c922ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:19:08,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 23:19:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-24 23:19:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-24 23:19:08,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:08,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:08,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:08,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash -326476706, now seen corresponding path program 1 times [2023-11-24 23:19:08,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:08,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430575527] [2023-11-24 23:19:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:08,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:09,703 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 23:19:09,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430575527] [2023-11-24 23:19:09,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430575527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:09,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:09,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:09,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360954498] [2023-11-24 23:19:09,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:09,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:19:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:19:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:19:09,781 INFO L87 Difference]: Start difference. First operand has 1808 states, 1776 states have (on average 1.9566441441441442) internal successors, (3475), 1779 states have internal predecessors, (3475), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:19:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:11,108 INFO L93 Difference]: Finished difference Result 3764 states and 7289 transitions. [2023-11-24 23:19:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:19:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2023-11-24 23:19:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:11,157 INFO L225 Difference]: With dead ends: 3764 [2023-11-24 23:19:11,158 INFO L226 Difference]: Without dead ends: 1955 [2023-11-24 23:19:11,173 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 23:19:11,181 INFO L413 NwaCegarLoop]: 3441 mSDtfsCounter, 3700 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 6796 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:11,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 6796 Invalid, 692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:19:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2023-11-24 23:19:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1954. [2023-11-24 23:19:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1954 states, 1898 states have (on average 1.9199157007376186) internal successors, (3644), 1901 states have internal predecessors, (3644), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2023-11-24 23:19:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3728 transitions. [2023-11-24 23:19:11,482 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3728 transitions. Word has length 58 [2023-11-24 23:19:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:11,483 INFO L495 AbstractCegarLoop]: Abstraction has 1954 states and 3728 transitions. [2023-11-24 23:19:11,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:19:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3728 transitions. [2023-11-24 23:19:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:19:11,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:11,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:11,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:19:11,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:11,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1242125018, now seen corresponding path program 1 times [2023-11-24 23:19:11,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:11,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856007742] [2023-11-24 23:19:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:19:11,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:11,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856007742] [2023-11-24 23:19:11,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856007742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:11,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372704232] [2023-11-24 23:19:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:11,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:11,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:11,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:11,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:19:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:12,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:19:12,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:19:12,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:12,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372704232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:12,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:19:12,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:19:12,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431850193] [2023-11-24 23:19:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:12,367 INFO L87 Difference]: Start difference. First operand 1954 states and 3728 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:13,005 INFO L93 Difference]: Finished difference Result 2563 states and 4645 transitions. [2023-11-24 23:19:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:19:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:13,030 INFO L225 Difference]: With dead ends: 2563 [2023-11-24 23:19:13,030 INFO L226 Difference]: Without dead ends: 2255 [2023-11-24 23:19:13,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:13,036 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3463 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:13,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3491 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2023-11-24 23:19:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2251. [2023-11-24 23:19:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2147 states have (on average 1.8653935724266417) internal successors, (4005), 2151 states have internal predecessors, (4005), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-24 23:19:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 4161 transitions. [2023-11-24 23:19:13,167 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 4161 transitions. Word has length 116 [2023-11-24 23:19:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:13,169 INFO L495 AbstractCegarLoop]: Abstraction has 2251 states and 4161 transitions. [2023-11-24 23:19:13,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 4161 transitions. [2023-11-24 23:19:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:19:13,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:13,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:13,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:13,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:13,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:13,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1718545380, now seen corresponding path program 1 times [2023-11-24 23:19:13,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:13,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205996358] [2023-11-24 23:19:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:19:13,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205996358] [2023-11-24 23:19:13,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205996358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452419625] [2023-11-24 23:19:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:13,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:13,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:13,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:13,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:19:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:13,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:19:13,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 23:19:13,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452419625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:13,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:19:13,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:19:13,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650949271] [2023-11-24 23:19:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:13,947 INFO L87 Difference]: Start difference. First operand 2251 states and 4161 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:14,663 INFO L93 Difference]: Finished difference Result 3448 states and 5956 transitions. [2023-11-24 23:19:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:19:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:14,684 INFO L225 Difference]: With dead ends: 3448 [2023-11-24 23:19:14,684 INFO L226 Difference]: Without dead ends: 2843 [2023-11-24 23:19:14,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:14,690 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3481 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3481 SdHoareTripleChecker+Valid, 3489 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:14,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3481 Valid, 3489 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:19:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2843 states. [2023-11-24 23:19:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2837. [2023-11-24 23:19:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2639 states have (on average 1.786661614247821) internal successors, (4715), 2645 states have internal predecessors, (4715), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2023-11-24 23:19:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 5011 transitions. [2023-11-24 23:19:14,807 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 5011 transitions. Word has length 116 [2023-11-24 23:19:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:14,808 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 5011 transitions. [2023-11-24 23:19:14,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 5011 transitions. [2023-11-24 23:19:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:19:14,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:14,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:14,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:15,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:15,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash -787990750, now seen corresponding path program 1 times [2023-11-24 23:19:15,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914077689] [2023-11-24 23:19:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:19:15,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914077689] [2023-11-24 23:19:15,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914077689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659420187] [2023-11-24 23:19:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:15,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:15,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:19:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:15,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:19:15,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 23:19:15,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659420187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:15,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:19:15,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:19:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485674607] [2023-11-24 23:19:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:15,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:15,615 INFO L87 Difference]: Start difference. First operand 2837 states and 5011 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:16,317 INFO L93 Difference]: Finished difference Result 5194 states and 8528 transitions. [2023-11-24 23:19:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:19:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:16,347 INFO L225 Difference]: With dead ends: 5194 [2023-11-24 23:19:16,348 INFO L226 Difference]: Without dead ends: 4003 [2023-11-24 23:19:16,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:16,356 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3475 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:16,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3475 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2023-11-24 23:19:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3993. [2023-11-24 23:19:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3993 states, 3611 states have (on average 1.6923289947382996) internal successors, (6111), 3621 states have internal predecessors, (6111), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-24 23:19:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3993 states to 3993 states and 6679 transitions. [2023-11-24 23:19:16,718 INFO L78 Accepts]: Start accepts. Automaton has 3993 states and 6679 transitions. Word has length 116 [2023-11-24 23:19:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:16,719 INFO L495 AbstractCegarLoop]: Abstraction has 3993 states and 6679 transitions. [2023-11-24 23:19:16,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3993 states and 6679 transitions. [2023-11-24 23:19:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:19:16,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:16,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:16,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:16,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:16,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:16,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:16,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1314015456, now seen corresponding path program 1 times [2023-11-24 23:19:16,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:16,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450642572] [2023-11-24 23:19:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:19:17,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:17,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450642572] [2023-11-24 23:19:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450642572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719985395] [2023-11-24 23:19:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:17,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:17,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:17,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:19:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:17,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:19:17,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-24 23:19:17,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:17,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719985395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:17,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:19:17,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:19:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825425642] [2023-11-24 23:19:17,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:17,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:17,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:17,428 INFO L87 Difference]: Start difference. First operand 3993 states and 6679 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:18,185 INFO L93 Difference]: Finished difference Result 8638 states and 13572 transitions. [2023-11-24 23:19:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:19:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:18,231 INFO L225 Difference]: With dead ends: 8638 [2023-11-24 23:19:18,232 INFO L226 Difference]: Without dead ends: 6291 [2023-11-24 23:19:18,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:18,244 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3484 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3484 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:18,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3484 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2023-11-24 23:19:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 6273. [2023-11-24 23:19:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5531 states have (on average 1.6009763153136864) internal successors, (8855), 5549 states have internal predecessors, (8855), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2023-11-24 23:19:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9951 transitions. [2023-11-24 23:19:18,531 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9951 transitions. Word has length 116 [2023-11-24 23:19:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:18,531 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9951 transitions. [2023-11-24 23:19:18,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9951 transitions. [2023-11-24 23:19:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:19:18,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:18,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:18,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:18,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:18,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:18,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1397574882, now seen corresponding path program 1 times [2023-11-24 23:19:18,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:18,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752948872] [2023-11-24 23:19:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:19:18,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752948872] [2023-11-24 23:19:18,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752948872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307599772] [2023-11-24 23:19:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:18,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:18,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:18,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:18,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:19:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:19,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:19:19,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:19:19,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307599772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:19,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:19:19,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:19:19,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414404564] [2023-11-24 23:19:19,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:19,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:19,208 INFO L87 Difference]: Start difference. First operand 6273 states and 9951 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:20,092 INFO L93 Difference]: Finished difference Result 15430 states and 23460 transitions. [2023-11-24 23:19:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-11-24 23:19:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:20,184 INFO L225 Difference]: With dead ends: 15430 [2023-11-24 23:19:20,184 INFO L226 Difference]: Without dead ends: 10803 [2023-11-24 23:19:20,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:20,205 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 3469 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:20,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3469 Valid, 3444 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10803 states. [2023-11-24 23:19:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10803 to 10769. [2023-11-24 23:19:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10769 states, 9323 states have (on average 1.5281561729057171) internal successors, (14247), 9357 states have internal predecessors, (14247), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2023-11-24 23:19:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10769 states to 10769 states and 16367 transitions. [2023-11-24 23:19:20,732 INFO L78 Accepts]: Start accepts. Automaton has 10769 states and 16367 transitions. Word has length 116 [2023-11-24 23:19:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:20,733 INFO L495 AbstractCegarLoop]: Abstraction has 10769 states and 16367 transitions. [2023-11-24 23:19:20,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:19:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 10769 states and 16367 transitions. [2023-11-24 23:19:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:19:20,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:20,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:20,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:20,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c251675-ffab-46d9-84df-4b2394388205/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:19:20,962 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:20,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:20,962 INFO L85 PathProgramCache]: Analyzing trace with hash -822147808, now seen corresponding path program 1 times [2023-11-24 23:19:20,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:20,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834349521] [2023-11-24 23:19:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:20,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-24 23:19:21,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834349521] [2023-11-24 23:19:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834349521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:21,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:21,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:19:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661355303] [2023-11-24 23:19:21,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:21,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:19:21,129 INFO L87 Difference]: Start difference. First operand 10769 states and 16367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:19:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:22,275 INFO L93 Difference]: Finished difference Result 18003 states and 27056 transitions. [2023-11-24 23:19:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-11-24 23:19:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:22,344 INFO L225 Difference]: With dead ends: 18003 [2023-11-24 23:19:22,344 INFO L226 Difference]: Without dead ends: 13361 [2023-11-24 23:19:22,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:19:22,368 INFO L413 NwaCegarLoop]: 3368 mSDtfsCounter, 109 mSDsluCounter, 3264 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6632 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:22,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6632 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:19:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13361 states. [2023-11-24 23:19:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13361 to 12673. [2023-11-24 23:19:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12673 states, 11163 states have (on average 1.5399982083669264) internal successors, (17191), 11197 states have internal predecessors, (17191), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2023-11-24 23:19:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12673 states to 12673 states and 19375 transitions. [2023-11-24 23:19:23,131 INFO L78 Accepts]: Start accepts. Automaton has 12673 states and 19375 transitions. Word has length 116 [2023-11-24 23:19:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:23,132 INFO L495 AbstractCegarLoop]: Abstraction has 12673 states and 19375 transitions. [2023-11-24 23:19:23,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:19:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 12673 states and 19375 transitions. [2023-11-24 23:19:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-24 23:19:23,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:23,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:23,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:19:23,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:23,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2104399420, now seen corresponding path program 1 times [2023-11-24 23:19:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:23,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083911094] [2023-11-24 23:19:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:23,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-24 23:19:23,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:23,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083911094] [2023-11-24 23:19:23,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083911094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:23,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:23,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:19:23,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721300378] [2023-11-24 23:19:23,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:23,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:23,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:19:23,361 INFO L87 Difference]: Start difference. First operand 12673 states and 19375 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:19:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:24,808 INFO L93 Difference]: Finished difference Result 34438 states and 51668 transitions. [2023-11-24 23:19:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-11-24 23:19:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:24,913 INFO L225 Difference]: With dead ends: 34438 [2023-11-24 23:19:24,913 INFO L226 Difference]: Without dead ends: 23411 [2023-11-24 23:19:24,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:19:24,963 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3470 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3470 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:24,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3470 Valid, 3446 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23411 states. [2023-11-24 23:19:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23411 to 23313. [2023-11-24 23:19:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23313 states, 20363 states have (on average 1.4963905122035064) internal successors, (30471), 20429 states have internal predecessors, (30471), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2023-11-24 23:19:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23313 states to 23313 states and 34703 transitions. [2023-11-24 23:19:26,302 INFO L78 Accepts]: Start accepts. Automaton has 23313 states and 34703 transitions. Word has length 158 [2023-11-24 23:19:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:26,303 INFO L495 AbstractCegarLoop]: Abstraction has 23313 states and 34703 transitions. [2023-11-24 23:19:26,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:19:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23313 states and 34703 transitions. [2023-11-24 23:19:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-24 23:19:26,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:26,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:26,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:19:26,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:26,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:26,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1984758067, now seen corresponding path program 1 times [2023-11-24 23:19:26,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:26,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309137227] [2023-11-24 23:19:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-11-24 23:19:26,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:26,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309137227] [2023-11-24 23:19:26,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309137227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:26,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:26,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:19:26,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275091891] [2023-11-24 23:19:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:26,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:19:26,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:26,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:19:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:19:26,556 INFO L87 Difference]: Start difference. First operand 23313 states and 34703 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:19:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:28,370 INFO L93 Difference]: Finished difference Result 66070 states and 97684 transitions. [2023-11-24 23:19:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:19:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-11-24 23:19:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:28,583 INFO L225 Difference]: With dead ends: 66070 [2023-11-24 23:19:28,583 INFO L226 Difference]: Without dead ends: 44403 [2023-11-24 23:19:28,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:19:28,680 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3472 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3472 SdHoareTripleChecker+Valid, 3446 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:28,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3472 Valid, 3446 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44403 states.