./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire --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 22315e954f625a92454f179210263631b555d33fa4f07d11e85c64617a347172 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:40,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:40,602 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:34:40,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:40,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:40,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:40,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:40,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:40,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:40,656 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:40,657 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:40,658 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:40,658 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:40,660 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:40,660 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:40,661 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:40,661 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:40,662 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:40,662 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:40,663 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:40,663 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:40,664 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:40,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:40,666 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:40,666 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:34:40,667 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:40,667 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:34:40,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:40,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:40,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:40,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:40,670 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:34:40,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:40,671 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:40,671 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:40,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:40,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:40,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:40,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:40,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:40,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:40,673 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:40,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:40,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:40,675 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:40,675 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:40,675 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:40,675 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_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22315e954f625a92454f179210263631b555d33fa4f07d11e85c64617a347172 [2023-11-23 20:34:41,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:41,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:41,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:41,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:41,077 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:41,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c [2023-11-23 20:34:44,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:45,122 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:45,123 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c [2023-11-23 20:34:45,182 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/data/cc9866946/409a300529134b2a83012cd6fbca38c8/FLAG7d9dc0923 [2023-11-23 20:34:45,199 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/data/cc9866946/409a300529134b2a83012cd6fbca38c8 [2023-11-23 20:34:45,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:45,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:45,210 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:45,210 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:45,216 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:45,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:45" (1/1) ... [2023-11-23 20:34:45,218 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5424aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:45, skipping insertion in model container [2023-11-23 20:34:45,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:45" (1/1) ... [2023-11-23 20:34:45,571 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:48,032 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_e5a4a9b3-3848-4449-bfc7-058b36eea219/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[380593,380606] [2023-11-23 20:34:48,068 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_e5a4a9b3-3848-4449-bfc7-058b36eea219/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[383339,383352] [2023-11-23 20:34:48,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:48,274 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:49,482 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_e5a4a9b3-3848-4449-bfc7-058b36eea219/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[380593,380606] [2023-11-23 20:34:49,489 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_e5a4a9b3-3848-4449-bfc7-058b36eea219/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[383339,383352] [2023-11-23 20:34:49,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:49,650 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:49,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49 WrapperNode [2023-11-23 20:34:49,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:49,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:49,652 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:49,652 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:49,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:49,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,286 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12814 [2023-11-23 20:34:50,287 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:50,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:50,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:50,288 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:50,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,482 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,732 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,806 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,894 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:50,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:50,896 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:50,897 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:50,898 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (1/1) ... [2023-11-23 20:34:50,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:50,931 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:51,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 20:34:51,069 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 20:34:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:34:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:34:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 20:34:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 20:34:51,070 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-23 20:34:51,070 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-23 20:34:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 20:34:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 20:34:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 20:34:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 20:34:51,071 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 20:34:51,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 20:34:51,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:51,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:51,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:51,238 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:51,241 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:35:01,146 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:35:03,479 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:35:03,479 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-23 20:35:03,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:03 BoogieIcfgContainer [2023-11-23 20:35:03,482 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:35:03,486 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:35:03,486 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:35:03,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:35:03,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:45" (1/3) ... [2023-11-23 20:35:03,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ebfc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:03, skipping insertion in model container [2023-11-23 20:35:03,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:49" (2/3) ... [2023-11-23 20:35:03,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ebfc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:03, skipping insertion in model container [2023-11-23 20:35:03,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:03" (3/3) ... [2023-11-23 20:35:03,493 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.05.cil-2.c [2023-11-23 20:35:03,515 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:35:03,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:35:03,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:35:03,622 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;@2f5aee05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:35:03,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:35:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 1766 states, 1735 states have (on average 1.9671469740634007) internal successors, (3413), 1740 states have internal predecessors, (3413), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-23 20:35:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 20:35:03,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:03,651 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] [2023-11-23 20:35:03,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:03,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash -317380772, now seen corresponding path program 1 times [2023-11-23 20:35:03,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:03,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105783142] [2023-11-23 20:35:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:04,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105783142] [2023-11-23 20:35:04,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105783142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:04,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:04,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992365271] [2023-11-23 20:35:04,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:04,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:35:04,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:35:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:35:04,255 INFO L87 Difference]: Start difference. First operand has 1766 states, 1735 states have (on average 1.9671469740634007) internal successors, (3413), 1740 states have internal predecessors, (3413), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2023-11-23 20:35:05,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:05,321 INFO L93 Difference]: Finished difference Result 3631 states and 7073 transitions. [2023-11-23 20:35:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:35:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 47 [2023-11-23 20:35:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:05,349 INFO L225 Difference]: With dead ends: 3631 [2023-11-23 20:35:05,350 INFO L226 Difference]: Without dead ends: 1864 [2023-11-23 20:35:05,358 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 [2023-11-23 20:35:05,362 INFO L413 NwaCegarLoop]: 3320 mSDtfsCounter, 3568 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 6568 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:05,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 6568 Invalid, 632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:35:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2023-11-23 20:35:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1863. [2023-11-23 20:35:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1813 states have (on average 1.9382239382239381) internal successors, (3514), 1817 states have internal predecessors, (3514), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 20:35:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3584 transitions. [2023-11-23 20:35:05,525 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3584 transitions. Word has length 47 [2023-11-23 20:35:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:05,526 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 3584 transitions. [2023-11-23 20:35:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2023-11-23 20:35:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3584 transitions. [2023-11-23 20:35:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 20:35:05,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:05,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:05,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:35:05,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:05,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1818823773, now seen corresponding path program 1 times [2023-11-23 20:35:05,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:05,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982566464] [2023-11-23 20:35:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:05,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:05,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982566464] [2023-11-23 20:35:05,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982566464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793688471] [2023-11-23 20:35:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:05,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:05,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:05,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:35:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:06,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:06,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 20:35:06,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:06,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793688471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:06,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:06,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:35:06,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404870882] [2023-11-23 20:35:06,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:06,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:06,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:06,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:06,160 INFO L87 Difference]: Start difference. First operand 1863 states and 3584 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2023-11-23 20:35:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:06,730 INFO L93 Difference]: Finished difference Result 2290 states and 4205 transitions. [2023-11-23 20:35:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 89 [2023-11-23 20:35:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:06,748 INFO L225 Difference]: With dead ends: 2290 [2023-11-23 20:35:06,748 INFO L226 Difference]: Without dead ends: 2073 [2023-11-23 20:35:06,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:06,752 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 3413 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:06,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3413 Valid, 3376 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:06,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2023-11-23 20:35:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2067. [2023-11-23 20:35:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1977 states have (on average 1.8942842690945878) internal successors, (3745), 1982 states have internal predecessors, (3745), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-23 20:35:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3871 transitions. [2023-11-23 20:35:06,849 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3871 transitions. Word has length 89 [2023-11-23 20:35:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:06,849 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 3871 transitions. [2023-11-23 20:35:06,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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) [2023-11-23 20:35:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3871 transitions. [2023-11-23 20:35:06,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 20:35:06,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:06,854 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:06,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:07,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:07,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:07,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2037214629, now seen corresponding path program 1 times [2023-11-23 20:35:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:07,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954542138] [2023-11-23 20:35:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:07,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954542138] [2023-11-23 20:35:07,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954542138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:07,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152056391] [2023-11-23 20:35:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:07,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:07,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:07,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:07,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:35:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:07,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:07,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:35:07,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:07,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152056391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:07,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:07,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:35:07,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658059851] [2023-11-23 20:35:07,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:07,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:07,715 INFO L87 Difference]: Start difference. First operand 2067 states and 3871 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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) [2023-11-23 20:35:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:08,296 INFO L93 Difference]: Finished difference Result 2896 states and 5070 transitions. [2023-11-23 20:35:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 89 [2023-11-23 20:35:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:08,314 INFO L225 Difference]: With dead ends: 2896 [2023-11-23 20:35:08,315 INFO L226 Difference]: Without dead ends: 2475 [2023-11-23 20:35:08,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:08,319 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3407 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:08,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3407 Valid, 3330 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2023-11-23 20:35:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2467. [2023-11-23 20:35:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2299 states have (on average 1.8247063940843846) internal successors, (4195), 2306 states have internal predecessors, (4195), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-23 20:35:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4429 transitions. [2023-11-23 20:35:08,565 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4429 transitions. Word has length 89 [2023-11-23 20:35:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:08,567 INFO L495 AbstractCegarLoop]: Abstraction has 2467 states and 4429 transitions. [2023-11-23 20:35:08,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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) [2023-11-23 20:35:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4429 transitions. [2023-11-23 20:35:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 20:35:08,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:08,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:08,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:08,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:08,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:08,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash 941625639, now seen corresponding path program 1 times [2023-11-23 20:35:08,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:08,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565258837] [2023-11-23 20:35:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:08,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565258837] [2023-11-23 20:35:08,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565258837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359314924] [2023-11-23 20:35:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:08,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:08,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:08,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:08,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:35:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:09,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:09,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 20:35:09,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:09,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359314924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:09,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:35:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586716463] [2023-11-23 20:35:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:09,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:09,169 INFO L87 Difference]: Start difference. First operand 2467 states and 4429 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-11-23 20:35:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:09,763 INFO L93 Difference]: Finished difference Result 4084 states and 6750 transitions. [2023-11-23 20:35:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 89 [2023-11-23 20:35:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:09,788 INFO L225 Difference]: With dead ends: 4084 [2023-11-23 20:35:09,789 INFO L226 Difference]: Without dead ends: 3263 [2023-11-23 20:35:09,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:09,798 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3416 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3416 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:09,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3416 Valid, 3330 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2023-11-23 20:35:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3251. [2023-11-23 20:35:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2931 states have (on average 1.7301262367792563) internal successors, (5071), 2942 states have internal predecessors, (5071), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-23 20:35:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 5513 transitions. [2023-11-23 20:35:09,981 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 5513 transitions. Word has length 89 [2023-11-23 20:35:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:09,981 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 5513 transitions. [2023-11-23 20:35:09,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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) [2023-11-23 20:35:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 5513 transitions. [2023-11-23 20:35:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 20:35:09,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:09,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:10,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:10,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:10,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1308606491, now seen corresponding path program 1 times [2023-11-23 20:35:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:10,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746129626] [2023-11-23 20:35:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:10,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 20:35:10,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:10,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746129626] [2023-11-23 20:35:10,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746129626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:10,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:10,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:10,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529942841] [2023-11-23 20:35:10,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:10,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:10,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:10,321 INFO L87 Difference]: Start difference. First operand 3251 states and 5513 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:35:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:10,908 INFO L93 Difference]: Finished difference Result 4527 states and 7340 transitions. [2023-11-23 20:35:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:10,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2023-11-23 20:35:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:10,934 INFO L225 Difference]: With dead ends: 4527 [2023-11-23 20:35:10,934 INFO L226 Difference]: Without dead ends: 3691 [2023-11-23 20:35:10,938 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 [2023-11-23 20:35:10,939 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 69 mSDsluCounter, 3203 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 6474 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:10,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 6474 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3691 states. [2023-11-23 20:35:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3691 to 3543. [2023-11-23 20:35:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3207 states have (on average 1.7159338946055505) internal successors, (5503), 3218 states have internal predecessors, (5503), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-23 20:35:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 5961 transitions. [2023-11-23 20:35:11,091 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 5961 transitions. Word has length 89 [2023-11-23 20:35:11,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:11,092 INFO L495 AbstractCegarLoop]: Abstraction has 3543 states and 5961 transitions. [2023-11-23 20:35:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:35:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 5961 transitions. [2023-11-23 20:35:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-23 20:35:11,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:11,100 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:35:11,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:35:11,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:11,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1809433943, now seen corresponding path program 1 times [2023-11-23 20:35:11,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:11,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470906108] [2023-11-23 20:35:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:11,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 20:35:11,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:11,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470906108] [2023-11-23 20:35:11,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470906108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:11,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:11,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:11,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268666626] [2023-11-23 20:35:11,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:11,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:11,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:11,190 INFO L87 Difference]: Start difference. First operand 3543 states and 5961 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:11,758 INFO L93 Difference]: Finished difference Result 7264 states and 11306 transitions. [2023-11-23 20:35:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 119 [2023-11-23 20:35:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:11,800 INFO L225 Difference]: With dead ends: 7264 [2023-11-23 20:35:11,800 INFO L226 Difference]: Without dead ends: 5367 [2023-11-23 20:35:11,808 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 [2023-11-23 20:35:11,809 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 3406 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:11,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3406 Valid, 3332 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2023-11-23 20:35:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5339. [2023-11-23 20:35:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 4691 states have (on average 1.6147942869324239) internal successors, (7575), 4710 states have internal predecessors, (7575), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-23 20:35:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 8449 transitions. [2023-11-23 20:35:12,070 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 8449 transitions. Word has length 119 [2023-11-23 20:35:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:12,072 INFO L495 AbstractCegarLoop]: Abstraction has 5339 states and 8449 transitions. [2023-11-23 20:35:12,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 8449 transitions. [2023-11-23 20:35:12,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-23 20:35:12,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:12,088 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:35:12,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:35:12,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:12,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash 805816638, now seen corresponding path program 1 times [2023-11-23 20:35:12,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:12,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556228310] [2023-11-23 20:35:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:12,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 20:35:12,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:12,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556228310] [2023-11-23 20:35:12,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556228310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:12,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:12,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573109231] [2023-11-23 20:35:12,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:12,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:12,186 INFO L87 Difference]: Start difference. First operand 5339 states and 8449 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:12,986 INFO L93 Difference]: Finished difference Result 12580 states and 18730 transitions. [2023-11-23 20:35:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 119 [2023-11-23 20:35:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:13,057 INFO L225 Difference]: With dead ends: 12580 [2023-11-23 20:35:13,057 INFO L226 Difference]: Without dead ends: 8887 [2023-11-23 20:35:13,076 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 [2023-11-23 20:35:13,077 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3409 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3357 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:13,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3357 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2023-11-23 20:35:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8835. [2023-11-23 20:35:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8835 states, 7579 states have (on average 1.5251352421163742) internal successors, (11559), 7614 states have internal predecessors, (11559), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2023-11-23 20:35:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8835 states to 8835 states and 13233 transitions. [2023-11-23 20:35:13,784 INFO L78 Accepts]: Start accepts. Automaton has 8835 states and 13233 transitions. Word has length 119 [2023-11-23 20:35:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:13,784 INFO L495 AbstractCegarLoop]: Abstraction has 8835 states and 13233 transitions. [2023-11-23 20:35:13,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:13,785 INFO L276 IsEmpty]: Start isEmpty. Operand 8835 states and 13233 transitions. [2023-11-23 20:35:13,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-23 20:35:13,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:13,815 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, 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] [2023-11-23 20:35:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:35:13,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:13,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash -895073137, now seen corresponding path program 1 times [2023-11-23 20:35:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481453858] [2023-11-23 20:35:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-23 20:35:13,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:13,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481453858] [2023-11-23 20:35:13,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481453858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:13,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768285962] [2023-11-23 20:35:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:13,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:14,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:14,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:35:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:14,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:14,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 20:35:14,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:14,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768285962] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:14,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:14,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:35:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127197649] [2023-11-23 20:35:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:14,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:14,263 INFO L87 Difference]: Start difference. First operand 8835 states and 13233 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:35:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:15,145 INFO L93 Difference]: Finished difference Result 14891 states and 21879 transitions. [2023-11-23 20:35:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2023-11-23 20:35:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:15,206 INFO L225 Difference]: With dead ends: 14891 [2023-11-23 20:35:15,207 INFO L226 Difference]: Without dead ends: 11199 [2023-11-23 20:35:15,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:15,222 INFO L413 NwaCegarLoop]: 3267 mSDtfsCounter, 84 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 6469 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:15,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 6469 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11199 states. [2023-11-23 20:35:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11199 to 10363. [2023-11-23 20:35:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 9011 states have (on average 1.526023748751526) internal successors, (13751), 9046 states have internal predecessors, (13751), 886 states have call successors, (886), 465 states have call predecessors, (886), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2023-11-23 20:35:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 15521 transitions. [2023-11-23 20:35:15,695 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 15521 transitions. Word has length 135 [2023-11-23 20:35:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:15,697 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 15521 transitions. [2023-11-23 20:35:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:35:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 15521 transitions. [2023-11-23 20:35:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-23 20:35:15,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:15,737 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, 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] [2023-11-23 20:35:15,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:15,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:15,961 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:15,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2055099916, now seen corresponding path program 1 times [2023-11-23 20:35:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:15,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860429255] [2023-11-23 20:35:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 20:35:16,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:16,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860429255] [2023-11-23 20:35:16,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860429255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:16,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981612596] [2023-11-23 20:35:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:16,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:16,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:16,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:16,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:35:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:16,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:16,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 20:35:16,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981612596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:16,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:16,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:35:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904899850] [2023-11-23 20:35:16,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:16,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:16,423 INFO L87 Difference]: Start difference. First operand 10363 states and 15521 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:35:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:17,387 INFO L93 Difference]: Finished difference Result 18051 states and 26527 transitions. [2023-11-23 20:35:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2023-11-23 20:35:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:17,440 INFO L225 Difference]: With dead ends: 18051 [2023-11-23 20:35:17,440 INFO L226 Difference]: Without dead ends: 13607 [2023-11-23 20:35:17,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:17,456 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 96 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 6500 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:17,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 6500 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13607 states. [2023-11-23 20:35:18,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13607 to 12547. [2023-11-23 20:35:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12547 states, 11051 states have (on average 1.5223056736946883) internal successors, (16823), 11086 states have internal predecessors, (16823), 958 states have call successors, (958), 537 states have call predecessors, (958), 536 states have return successors, (956), 924 states have call predecessors, (956), 956 states have call successors, (956) [2023-11-23 20:35:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12547 states to 12547 states and 18737 transitions. [2023-11-23 20:35:18,130 INFO L78 Accepts]: Start accepts. Automaton has 12547 states and 18737 transitions. Word has length 135 [2023-11-23 20:35:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:18,131 INFO L495 AbstractCegarLoop]: Abstraction has 12547 states and 18737 transitions. [2023-11-23 20:35:18,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:35:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 12547 states and 18737 transitions. [2023-11-23 20:35:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-23 20:35:18,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:18,165 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, 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] [2023-11-23 20:35:18,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:18,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:18,381 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:18,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash -66112587, now seen corresponding path program 1 times [2023-11-23 20:35:18,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843157141] [2023-11-23 20:35:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-23 20:35:18,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:18,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843157141] [2023-11-23 20:35:18,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843157141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:18,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550679872] [2023-11-23 20:35:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:18,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:18,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:18,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:18,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:35:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:18,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:18,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 20:35:18,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550679872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:18,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:18,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:35:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205100922] [2023-11-23 20:35:18,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:18,809 INFO L87 Difference]: Start difference. First operand 12547 states and 18737 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:35:19,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:19,980 INFO L93 Difference]: Finished difference Result 22531 states and 33139 transitions. [2023-11-23 20:35:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2023-11-23 20:35:19,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:20,049 INFO L225 Difference]: With dead ends: 22531 [2023-11-23 20:35:20,049 INFO L226 Difference]: Without dead ends: 16923 [2023-11-23 20:35:20,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:20,070 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 102 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:20,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6505 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16923 states. [2023-11-23 20:35:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16923 to 15751. [2023-11-23 20:35:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15751 states, 14039 states have (on average 1.5162760880404587) internal successors, (21287), 14074 states have internal predecessors, (21287), 1066 states have call successors, (1066), 645 states have call predecessors, (1066), 644 states have return successors, (1064), 1032 states have call predecessors, (1064), 1064 states have call successors, (1064) [2023-11-23 20:35:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15751 states to 15751 states and 23417 transitions. [2023-11-23 20:35:21,009 INFO L78 Accepts]: Start accepts. Automaton has 15751 states and 23417 transitions. Word has length 135 [2023-11-23 20:35:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:21,010 INFO L495 AbstractCegarLoop]: Abstraction has 15751 states and 23417 transitions. [2023-11-23 20:35:21,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:35:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 15751 states and 23417 transitions. [2023-11-23 20:35:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-23 20:35:21,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:21,061 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:21,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:21,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 20:35:21,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:21,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:21,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1996856850, now seen corresponding path program 1 times [2023-11-23 20:35:21,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:21,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751319215] [2023-11-23 20:35:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:21,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:35:22,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:22,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751319215] [2023-11-23 20:35:22,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751319215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:22,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249758689] [2023-11-23 20:35:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:22,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:22,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:22,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5a4a9b3-3848-4449-bfc7-058b36eea219/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:35:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:22,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 20:35:22,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:35:22,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-23 20:35:23,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249758689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:23,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [646181078] [2023-11-23 20:35:23,384 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2023-11-23 20:35:23,384 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:23,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:23,396 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:23,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs