./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/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_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/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_397d4a76-8f43-4f60-8aa9-b03d3ade505b/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 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:07:37,223 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:07:37,367 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:07:37,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:07:37,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:07:37,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:07:37,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:07:37,426 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:07:37,427 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:07:37,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:07:37,433 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:07:37,434 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:07:37,434 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:07:37,436 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:07:37,437 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:07:37,437 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:07:37,438 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:07:37,438 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:07:37,439 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:07:37,439 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:07:37,440 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:07:37,441 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:07:37,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:07:37,442 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:07:37,443 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:07:37,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:07:37,444 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:07:37,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:07:37,445 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:07:37,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:07:37,447 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:07:37,447 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:07:37,447 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:07:37,448 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:07:37,448 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:07:37,448 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:07:37,448 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:07:37,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:07:37,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:07:37,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:07:37,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:07:37,450 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:07:37,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:07:37,450 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:07:37,451 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:07:37,451 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:07:37,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:07:37,452 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_397d4a76-8f43-4f60-8aa9-b03d3ade505b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb [2023-11-25 00:07:37,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:07:37,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:07:37,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:07:37,838 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:07:37,839 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:07:37,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2023-11-25 00:07:41,454 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:07:42,473 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:07:42,489 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2023-11-25 00:07:42,554 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/data/374c4e714/6b68fabff8cf451ab16de8cd74939d08/FLAG9e3e1a9a5 [2023-11-25 00:07:42,577 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/data/374c4e714/6b68fabff8cf451ab16de8cd74939d08 [2023-11-25 00:07:42,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:07:42,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:07:42,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:42,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:07:42,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:07:42,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:42" (1/1) ... [2023-11-25 00:07:42,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f64295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:42, skipping insertion in model container [2023-11-25 00:07:42,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:07:42" (1/1) ... [2023-11-25 00:07:42,902 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:07:45,942 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_397d4a76-8f43-4f60-8aa9-b03d3ade505b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2023-11-25 00:07:45,983 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_397d4a76-8f43-4f60-8aa9-b03d3ade505b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2023-11-25 00:07:46,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:46,460 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:07:47,836 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_397d4a76-8f43-4f60-8aa9-b03d3ade505b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2023-11-25 00:07:47,846 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_397d4a76-8f43-4f60-8aa9-b03d3ade505b/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2023-11-25 00:07:47,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:07:47,976 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:07:47,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47 WrapperNode [2023-11-25 00:07:47,977 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:07:47,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:47,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:07:47,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:07:47,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:48,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:48,661 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13114 [2023-11-25 00:07:48,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:07:48,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:07:48,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:07:48,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:07:48,677 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:48,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:48,812 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:48,812 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:49,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:49,268 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:49,353 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:49,377 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:49,508 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:07:49,509 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:07:49,509 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:07:49,510 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:07:49,511 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (1/1) ... [2023-11-25 00:07:49,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:07:49,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:49,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:07:49,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:07:49,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:07:49,598 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-25 00:07:49,598 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-25 00:07:49,599 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-25 00:07:49,599 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-25 00:07:49,599 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-25 00:07:49,599 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-25 00:07:49,599 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-25 00:07:49,599 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-25 00:07:49,600 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-25 00:07:49,600 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-25 00:07:49,600 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-25 00:07:49,600 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-25 00:07:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-25 00:07:49,601 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-25 00:07:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:07:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:07:49,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:07:49,742 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:07:49,745 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:08:01,785 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:08:05,353 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:08:05,353 INFO L309 CfgBuilder]: Removed 14 assume(true) statements. [2023-11-25 00:08:05,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:05 BoogieIcfgContainer [2023-11-25 00:08:05,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:08:05,360 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:08:05,361 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:08:05,365 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:08:05,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:07:42" (1/3) ... [2023-11-25 00:08:05,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c7d27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:05, skipping insertion in model container [2023-11-25 00:08:05,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:07:47" (2/3) ... [2023-11-25 00:08:05,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c7d27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:05, skipping insertion in model container [2023-11-25 00:08:05,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:05" (3/3) ... [2023-11-25 00:08:05,369 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.10.cil-1.c [2023-11-25 00:08:05,394 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:08:05,394 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-25 00:08:05,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:08:05,513 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;@62087e90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:08:05,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-25 00:08:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-25 00:08:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-25 00:08:05,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:05,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:05,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:05,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash -896001101, now seen corresponding path program 1 times [2023-11-25 00:08:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404823486] [2023-11-25 00:08:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:05,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:08:06,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:06,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404823486] [2023-11-25 00:08:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404823486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:06,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:06,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:08:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293232012] [2023-11-25 00:08:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:06,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:08:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:08:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:08:06,530 INFO L87 Difference]: Start difference. First operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-25 00:08:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:07,956 INFO L93 Difference]: Finished difference Result 3811 states and 7368 transitions. [2023-11-25 00:08:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:08:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2023-11-25 00:08:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:07,992 INFO L225 Difference]: With dead ends: 3811 [2023-11-25 00:08:07,992 INFO L226 Difference]: Without dead ends: 1984 [2023-11-25 00:08:08,007 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 [2023-11-25 00:08:08,013 INFO L413 NwaCegarLoop]: 3480 mSDtfsCounter, 3743 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:08,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 6868 Invalid, 712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:08:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2023-11-25 00:08:08,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2023-11-25 00:08:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1923 states have (on average 1.9157566302652107) internal successors, (3684), 1927 states have internal predecessors, (3684), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-25 00:08:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3774 transitions. [2023-11-25 00:08:08,216 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3774 transitions. Word has length 62 [2023-11-25 00:08:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:08,217 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 3774 transitions. [2023-11-25 00:08:08,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-25 00:08:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3774 transitions. [2023-11-25 00:08:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:08:08,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:08,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:08,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:08:08,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:08,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1443875493, now seen corresponding path program 1 times [2023-11-25 00:08:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:08,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3214836] [2023-11-25 00:08:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:08,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:08:08,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:08,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3214836] [2023-11-25 00:08:08,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3214836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:08,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514656905] [2023-11-25 00:08:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:08,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:08,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:08,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:08,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:08:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:09,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:09,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-25 00:08:09,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:09,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514656905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:09,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:09,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:08:09,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500686663] [2023-11-25 00:08:09,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:09,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:09,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:09,279 INFO L87 Difference]: Start difference. First operand 1983 states and 3774 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:10,067 INFO L93 Difference]: Finished difference Result 2650 states and 4785 transitions. [2023-11-25 00:08:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-25 00:08:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:10,089 INFO L225 Difference]: With dead ends: 2650 [2023-11-25 00:08:10,089 INFO L226 Difference]: Without dead ends: 2313 [2023-11-25 00:08:10,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:10,093 INFO L413 NwaCegarLoop]: 3333 mSDtfsCounter, 3490 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:10,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 3546 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:08:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2023-11-25 00:08:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2023-11-25 00:08:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2197 states have (on average 1.859353664087392) internal successors, (4085), 2202 states have internal predecessors, (4085), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-25 00:08:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4251 transitions. [2023-11-25 00:08:10,224 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4251 transitions. Word has length 124 [2023-11-25 00:08:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:10,227 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 4251 transitions. [2023-11-25 00:08:10,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4251 transitions. [2023-11-25 00:08:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:08:10,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:10,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:10,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:10,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:10,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:10,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash -877722363, now seen corresponding path program 1 times [2023-11-25 00:08:10,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:10,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750072855] [2023-11-25 00:08:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:10,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:08:10,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750072855] [2023-11-25 00:08:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750072855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466349427] [2023-11-25 00:08:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:10,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:10,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:10,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:08:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:11,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:11,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-25 00:08:11,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:11,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466349427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:11,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:11,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:08:11,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495180574] [2023-11-25 00:08:11,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:11,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:11,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:11,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:11,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:11,097 INFO L87 Difference]: Start difference. First operand 2307 states and 4251 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:11,833 INFO L93 Difference]: Finished difference Result 3616 states and 6230 transitions. [2023-11-25 00:08:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-25 00:08:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:11,855 INFO L225 Difference]: With dead ends: 3616 [2023-11-25 00:08:11,856 INFO L226 Difference]: Without dead ends: 2955 [2023-11-25 00:08:11,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:11,861 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 3508 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3508 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:11,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3508 Valid, 3526 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:08:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2023-11-25 00:08:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2023-11-25 00:08:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2739 states have (on average 1.7798466593647317) internal successors, (4875), 2746 states have internal predecessors, (4875), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-25 00:08:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5189 transitions. [2023-11-25 00:08:11,990 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5189 transitions. Word has length 124 [2023-11-25 00:08:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:11,990 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5189 transitions. [2023-11-25 00:08:11,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5189 transitions. [2023-11-25 00:08:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:08:11,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:11,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:12,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:08:12,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:12,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:12,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:12,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1905813349, now seen corresponding path program 1 times [2023-11-25 00:08:12,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:12,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564092287] [2023-11-25 00:08:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:12,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:08:12,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:12,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564092287] [2023-11-25 00:08:12,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564092287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:12,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605704984] [2023-11-25 00:08:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:12,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:12,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:12,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:08:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:12,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:12,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-25 00:08:12,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:12,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605704984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:12,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:12,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:08:12,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675704958] [2023-11-25 00:08:12,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:12,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:12,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:12,729 INFO L87 Difference]: Start difference. First operand 2947 states and 5189 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:13,351 INFO L93 Difference]: Finished difference Result 5524 states and 9070 transitions. [2023-11-25 00:08:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:13,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-25 00:08:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:13,379 INFO L225 Difference]: With dead ends: 5524 [2023-11-25 00:08:13,380 INFO L226 Difference]: Without dead ends: 4223 [2023-11-25 00:08:13,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:13,387 INFO L413 NwaCegarLoop]: 3277 mSDtfsCounter, 3502 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3502 SdHoareTripleChecker+Valid, 3490 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:13,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3502 Valid, 3490 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:08:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2023-11-25 00:08:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2023-11-25 00:08:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3811 states have (on average 1.6874836001049593) internal successors, (6431), 3822 states have internal predecessors, (6431), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2023-11-25 00:08:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7033 transitions. [2023-11-25 00:08:13,584 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7033 transitions. Word has length 124 [2023-11-25 00:08:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:13,584 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 7033 transitions. [2023-11-25 00:08:13,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7033 transitions. [2023-11-25 00:08:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:08:13,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:13,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:13,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:13,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:13,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:13,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:13,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1856826939, now seen corresponding path program 1 times [2023-11-25 00:08:13,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:13,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692506271] [2023-11-25 00:08:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:08:13,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692506271] [2023-11-25 00:08:13,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692506271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264422535] [2023-11-25 00:08:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:13,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:13,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:13,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:13,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:08:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:14,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:14,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-25 00:08:14,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264422535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:14,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:14,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:08:14,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414553158] [2023-11-25 00:08:14,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:14,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:14,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:14,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:14,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:14,388 INFO L87 Difference]: Start difference. First operand 4211 states and 7033 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:15,085 INFO L93 Difference]: Finished difference Result 9292 states and 14650 transitions. [2023-11-25 00:08:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:15,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-25 00:08:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:15,132 INFO L225 Difference]: With dead ends: 9292 [2023-11-25 00:08:15,132 INFO L226 Difference]: Without dead ends: 6727 [2023-11-25 00:08:15,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:15,147 INFO L413 NwaCegarLoop]: 3277 mSDtfsCounter, 3511 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3511 SdHoareTripleChecker+Valid, 3490 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:15,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3511 Valid, 3490 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:08:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2023-11-25 00:08:15,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2023-11-25 00:08:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5931 states have (on average 1.6009104704097117) internal successors, (9495), 5950 states have internal predecessors, (9495), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-25 00:08:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10657 transitions. [2023-11-25 00:08:15,456 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10657 transitions. Word has length 124 [2023-11-25 00:08:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:15,456 INFO L495 AbstractCegarLoop]: Abstraction has 6707 states and 10657 transitions. [2023-11-25 00:08:15,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10657 transitions. [2023-11-25 00:08:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:08:15,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:15,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:15,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-25 00:08:15,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:15,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:15,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:15,679 INFO L85 PathProgramCache]: Analyzing trace with hash -478014619, now seen corresponding path program 1 times [2023-11-25 00:08:15,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:15,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376481597] [2023-11-25 00:08:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:15,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:08:15,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376481597] [2023-11-25 00:08:15,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376481597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263838206] [2023-11-25 00:08:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:15,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:15,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:08:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:16,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:08:16,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-25 00:08:16,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263838206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:16,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:16,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:08:16,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586993589] [2023-11-25 00:08:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:16,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:08:16,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:16,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:08:16,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:16,223 INFO L87 Difference]: Start difference. First operand 6707 states and 10657 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:17,129 INFO L93 Difference]: Finished difference Result 16732 states and 25610 transitions. [2023-11-25 00:08:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:08:17,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-25 00:08:17,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:17,201 INFO L225 Difference]: With dead ends: 16732 [2023-11-25 00:08:17,201 INFO L226 Difference]: Without dead ends: 11671 [2023-11-25 00:08:17,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:17,225 INFO L413 NwaCegarLoop]: 3295 mSDtfsCounter, 3496 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3496 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:17,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3496 Valid, 3508 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:08:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2023-11-25 00:08:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2023-11-25 00:08:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10123 states have (on average 1.5338338437222168) internal successors, (15527), 10158 states have internal predecessors, (15527), 1126 states have call successors, (1126), 385 states have call predecessors, (1126), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2023-11-25 00:08:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 17777 transitions. [2023-11-25 00:08:17,978 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 17777 transitions. Word has length 124 [2023-11-25 00:08:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:17,980 INFO L495 AbstractCegarLoop]: Abstraction has 11635 states and 17777 transitions. [2023-11-25 00:08:17,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 17777 transitions. [2023-11-25 00:08:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:08:18,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:18,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:18,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:18,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_397d4a76-8f43-4f60-8aa9-b03d3ade505b/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-25 00:08:18,221 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:18,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:18,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1705248197, now seen corresponding path program 1 times [2023-11-25 00:08:18,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:18,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595695603] [2023-11-25 00:08:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:18,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-25 00:08:19,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:19,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595695603] [2023-11-25 00:08:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595695603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:19,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:19,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:08:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081823840] [2023-11-25 00:08:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:19,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:08:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:08:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:19,113 INFO L87 Difference]: Start difference. First operand 11635 states and 17777 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-25 00:08:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:21,197 INFO L93 Difference]: Finished difference Result 27019 states and 40343 transitions. [2023-11-25 00:08:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:08:21,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2023-11-25 00:08:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:21,300 INFO L225 Difference]: With dead ends: 27019 [2023-11-25 00:08:21,302 INFO L226 Difference]: Without dead ends: 17031 [2023-11-25 00:08:21,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:08:21,348 INFO L413 NwaCegarLoop]: 3280 mSDtfsCounter, 3978 mSDsluCounter, 9702 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3984 SdHoareTripleChecker+Valid, 12982 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:21,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3984 Valid, 12982 Invalid, 1299 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [118 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:08:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17031 states.