./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje --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 f0e5700e5ac9932bdfeab3e919620f637ada74ab4466fc53a192536a8538b28f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:50:58,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:50:59,028 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:50:59,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:50:59,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:50:59,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:50:59,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:50:59,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:50:59,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:50:59,087 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:50:59,087 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:50:59,088 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:50:59,088 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:50:59,089 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:50:59,091 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:50:59,092 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:50:59,092 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:50:59,093 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:50:59,093 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:50:59,093 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:50:59,094 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:50:59,094 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:50:59,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:50:59,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:50:59,100 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:50:59,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:50:59,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:50:59,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:50:59,101 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:50:59,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:50:59,102 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:50:59,102 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:50:59,104 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:50:59,104 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:50:59,104 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:50:59,105 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:50:59,106 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:50:59,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:50:59,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:50:59,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:50:59,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:50:59,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:50:59,108 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:50:59,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:50:59,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:50:59,110 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:50:59,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:50:59,110 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_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0e5700e5ac9932bdfeab3e919620f637ada74ab4466fc53a192536a8538b28f [2024-11-09 06:50:59,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:50:59,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:50:59,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:50:59,519 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:50:59,520 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:50:59,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c Unable to find full path for "g++" [2024-11-09 06:51:01,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:51:02,652 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:51:02,653 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c [2024-11-09 06:51:02,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/data/e6f2e8cbd/35a49c60182f41679b808546d0743b90/FLAG3a9a26cc3 [2024-11-09 06:51:02,759 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/data/e6f2e8cbd/35a49c60182f41679b808546d0743b90 [2024-11-09 06:51:02,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:51:02,766 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:51:02,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:51:02,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:51:02,777 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:51:02,778 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:51:02" (1/1) ... [2024-11-09 06:51:02,779 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6163fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:02, skipping insertion in model container [2024-11-09 06:51:02,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:51:02" (1/1) ... [2024-11-09 06:51:03,094 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:51:05,593 WARN L250 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_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c[381679,381692] [2024-11-09 06:51:05,630 WARN L250 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_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c[383339,383352] [2024-11-09 06:51:06,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:51:06,020 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:51:07,405 WARN L250 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_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c[381679,381692] [2024-11-09 06:51:07,411 WARN L250 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_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.12.cil-2.c[383339,383352] [2024-11-09 06:51:07,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:51:07,551 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:51:07,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07 WrapperNode [2024-11-09 06:51:07,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:51:07,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:51:07,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:51:07,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:51:07,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:07,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,162 INFO L138 Inliner]: procedures = 68, calls = 77, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 13217 [2024-11-09 06:51:08,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:51:08,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:51:08,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:51:08,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:51:08,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,322 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,322 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,575 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,643 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,693 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,758 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:51:08,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:51:08,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:51:08,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:51:08,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (1/1) ... [2024-11-09 06:51:08,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:51:08,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:08,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:51:08,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:51:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:51:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 06:51:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 06:51:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 06:51:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 06:51:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 06:51:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 06:51:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 06:51:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 06:51:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 06:51:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 06:51:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 06:51:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 06:51:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:51:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:51:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:51:09,085 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:51:09,088 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:51:20,849 INFO L? ?]: Removed 1755 outVars from TransFormulas that were not future-live. [2024-11-09 06:51:20,850 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:51:24,063 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:51:24,063 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-09 06:51:24,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:51:24 BoogieIcfgContainer [2024-11-09 06:51:24,064 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:51:24,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:51:24,067 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:51:24,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:51:24,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:51:02" (1/3) ... [2024-11-09 06:51:24,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6ed00e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:51:24, skipping insertion in model container [2024-11-09 06:51:24,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:51:07" (2/3) ... [2024-11-09 06:51:24,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6ed00e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:51:24, skipping insertion in model container [2024-11-09 06:51:24,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:51:24" (3/3) ... [2024-11-09 06:51:24,074 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.12.cil-2.c [2024-11-09 06:51:24,097 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:51:24,097 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 06:51:24,224 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:51:24,230 INFO L333 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, 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;@1aa6441d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:51:24,231 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 06:51:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 1844 states, 1809 states have (on average 1.94914317302377) internal successors, (3526), 1812 states have internal predecessors, (3526), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-09 06:51:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 06:51:24,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:24,258 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:51:24,258 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:24,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash -5997692, now seen corresponding path program 1 times [2024-11-09 06:51:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:24,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209918754] [2024-11-09 06:51:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:24,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:51:24,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:24,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209918754] [2024-11-09 06:51:24,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209918754] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:24,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:51:24,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:51:24,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350028733] [2024-11-09 06:51:24,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:24,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:51:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:51:24,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:51:24,973 INFO L87 Difference]: Start difference. First operand has 1844 states, 1809 states have (on average 1.94914317302377) internal successors, (3526), 1812 states have internal predecessors, (3526), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:51:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:26,302 INFO L93 Difference]: Finished difference Result 3872 states and 7466 transitions. [2024-11-09 06:51:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:51:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2024-11-09 06:51:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:26,329 INFO L225 Difference]: With dead ends: 3872 [2024-11-09 06:51:26,329 INFO L226 Difference]: Without dead ends: 2027 [2024-11-09 06:51:26,339 INFO L431 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 [2024-11-09 06:51:26,342 INFO L432 NwaCegarLoop]: 3537 mSDtfsCounter, 3805 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 6976 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:26,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3805 Valid, 6976 Invalid, 740 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:51:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2024-11-09 06:51:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2026. [2024-11-09 06:51:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 1964 states have (on average 1.9073319755600815) internal successors, (3746), 1967 states have internal predecessors, (3746), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 06:51:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3842 transitions. [2024-11-09 06:51:26,500 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3842 transitions. Word has length 67 [2024-11-09 06:51:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:26,501 INFO L471 AbstractCegarLoop]: Abstraction has 2026 states and 3842 transitions. [2024-11-09 06:51:26,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 06:51:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3842 transitions. [2024-11-09 06:51:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:26,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:26,512 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:26,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:51:26,513 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:26,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 758903363, now seen corresponding path program 1 times [2024-11-09 06:51:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:26,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740447184] [2024-11-09 06:51:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:26,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:51:27,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740447184] [2024-11-09 06:51:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740447184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501134676] [2024-11-09 06:51:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:27,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:27,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:27,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:27,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:51:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:27,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:27,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 06:51:27,489 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:27,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501134676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:27,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:27,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:51:27,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289930468] [2024-11-09 06:51:27,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:27,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:27,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:27,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:27,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:27,494 INFO L87 Difference]: Start difference. First operand 2026 states and 3842 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:28,150 INFO L93 Difference]: Finished difference Result 2779 states and 4993 transitions. [2024-11-09 06:51:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:51:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2024-11-09 06:51:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:28,167 INFO L225 Difference]: With dead ends: 2779 [2024-11-09 06:51:28,168 INFO L226 Difference]: Without dead ends: 2399 [2024-11-09 06:51:28,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:28,172 INFO L432 NwaCegarLoop]: 3355 mSDtfsCounter, 3520 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 3593 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:28,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3520 Valid, 3593 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:51:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2024-11-09 06:51:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2395. [2024-11-09 06:51:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2279 states have (on average 1.8468626590609916) internal successors, (4209), 2283 states have internal predecessors, (4209), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2024-11-09 06:51:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4389 transitions. [2024-11-09 06:51:28,266 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4389 transitions. Word has length 137 [2024-11-09 06:51:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:28,268 INFO L471 AbstractCegarLoop]: Abstraction has 2395 states and 4389 transitions. [2024-11-09 06:51:28,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4389 transitions. [2024-11-09 06:51:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:28,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:28,275 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:28,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:51:28,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:28,476 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:28,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 787789603, now seen corresponding path program 1 times [2024-11-09 06:51:28,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:28,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688564637] [2024-11-09 06:51:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:51:28,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688564637] [2024-11-09 06:51:28,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688564637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:28,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060609542] [2024-11-09 06:51:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:28,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:28,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:28,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:51:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:29,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:29,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 06:51:29,186 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:29,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060609542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:29,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:29,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:51:29,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553798605] [2024-11-09 06:51:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:29,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:29,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:29,190 INFO L87 Difference]: Start difference. First operand 2395 states and 4389 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:29,993 INFO L93 Difference]: Finished difference Result 3880 states and 6652 transitions. [2024-11-09 06:51:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:51:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2024-11-09 06:51:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:30,014 INFO L225 Difference]: With dead ends: 3880 [2024-11-09 06:51:30,014 INFO L226 Difference]: Without dead ends: 3131 [2024-11-09 06:51:30,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:30,020 INFO L432 NwaCegarLoop]: 3335 mSDtfsCounter, 3538 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3573 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:30,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3573 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:51:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2024-11-09 06:51:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3125. [2024-11-09 06:51:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 2903 states have (on average 1.764726145366862) internal successors, (5123), 2909 states have internal predecessors, (5123), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2024-11-09 06:51:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5467 transitions. [2024-11-09 06:51:30,142 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5467 transitions. Word has length 137 [2024-11-09 06:51:30,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:30,143 INFO L471 AbstractCegarLoop]: Abstraction has 3125 states and 5467 transitions. [2024-11-09 06:51:30,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:30,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5467 transitions. [2024-11-09 06:51:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:30,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:30,149 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:30,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:51:30,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:30,353 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:30,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:30,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1701182461, now seen corresponding path program 1 times [2024-11-09 06:51:30,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:30,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208744949] [2024-11-09 06:51:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:30,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:51:30,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208744949] [2024-11-09 06:51:30,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208744949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155055673] [2024-11-09 06:51:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:30,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:30,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:30,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:30,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:51:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:30,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:30,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:51:30,945 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:30,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155055673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:30,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:30,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:51:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081787871] [2024-11-09 06:51:30,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:30,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:30,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:30,950 INFO L87 Difference]: Start difference. First operand 3125 states and 5467 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:31,642 INFO L93 Difference]: Finished difference Result 6058 states and 9920 transitions. [2024-11-09 06:51:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:51:31,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2024-11-09 06:51:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:31,670 INFO L225 Difference]: With dead ends: 6058 [2024-11-09 06:51:31,670 INFO L226 Difference]: Without dead ends: 4579 [2024-11-09 06:51:31,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:31,680 INFO L432 NwaCegarLoop]: 3320 mSDtfsCounter, 3532 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3532 SdHoareTripleChecker+Valid, 3558 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:31,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3532 Valid, 3558 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:51:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2024-11-09 06:51:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4569. [2024-11-09 06:51:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4139 states have (on average 1.673592655230732) internal successors, (6927), 4149 states have internal predecessors, (6927), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2024-11-09 06:51:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 7591 transitions. [2024-11-09 06:51:31,891 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 7591 transitions. Word has length 137 [2024-11-09 06:51:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:31,891 INFO L471 AbstractCegarLoop]: Abstraction has 4569 states and 7591 transitions. [2024-11-09 06:51:31,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 7591 transitions. [2024-11-09 06:51:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:31,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:31,903 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:31,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:51:32,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:32,106 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:32,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:32,106 INFO L85 PathProgramCache]: Analyzing trace with hash -873301789, now seen corresponding path program 1 times [2024-11-09 06:51:32,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:32,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139045140] [2024-11-09 06:51:32,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:32,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:51:32,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:32,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139045140] [2024-11-09 06:51:32,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139045140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:32,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945117261] [2024-11-09 06:51:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:32,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:32,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:32,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:32,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:51:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:32,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:32,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 06:51:32,628 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:32,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945117261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:32,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:32,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:51:32,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594284052] [2024-11-09 06:51:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:32,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:32,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:32,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:32,631 INFO L87 Difference]: Start difference. First operand 4569 states and 7591 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:33,400 INFO L93 Difference]: Finished difference Result 10366 states and 16356 transitions. [2024-11-09 06:51:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:51:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2024-11-09 06:51:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:33,443 INFO L225 Difference]: With dead ends: 10366 [2024-11-09 06:51:33,443 INFO L226 Difference]: Without dead ends: 7443 [2024-11-09 06:51:33,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:33,459 INFO L432 NwaCegarLoop]: 3349 mSDtfsCounter, 3541 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:33,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3587 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:51:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7443 states. [2024-11-09 06:51:33,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7443 to 7425. [2024-11-09 06:51:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7425 states, 6587 states have (on average 1.5920752998330043) internal successors, (10487), 6605 states have internal predecessors, (10487), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2024-11-09 06:51:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 11775 transitions. [2024-11-09 06:51:33,775 INFO L78 Accepts]: Start accepts. Automaton has 7425 states and 11775 transitions. Word has length 137 [2024-11-09 06:51:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:33,776 INFO L471 AbstractCegarLoop]: Abstraction has 7425 states and 11775 transitions. [2024-11-09 06:51:33,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7425 states and 11775 transitions. [2024-11-09 06:51:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:33,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:33,789 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:33,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:51:33,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:33,994 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:33,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1524662269, now seen corresponding path program 1 times [2024-11-09 06:51:33,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268612333] [2024-11-09 06:51:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:33,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:51:34,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268612333] [2024-11-09 06:51:34,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268612333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117322933] [2024-11-09 06:51:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:34,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:34,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:34,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:34,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:51:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:34,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:34,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:51:34,724 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:34,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117322933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:34,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:34,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:51:34,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627024650] [2024-11-09 06:51:34,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:34,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:34,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:34,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:34,727 INFO L87 Difference]: Start difference. First operand 7425 states and 11775 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:35,626 INFO L93 Difference]: Finished difference Result 18886 states and 29028 transitions. [2024-11-09 06:51:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:51:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2024-11-09 06:51:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:35,720 INFO L225 Difference]: With dead ends: 18886 [2024-11-09 06:51:35,720 INFO L226 Difference]: Without dead ends: 13107 [2024-11-09 06:51:35,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:35,747 INFO L432 NwaCegarLoop]: 3302 mSDtfsCounter, 3511 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3511 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:35,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3511 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:51:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13107 states. [2024-11-09 06:51:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13107 to 13073. [2024-11-09 06:51:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13073 states, 11435 states have (on average 1.5313511149978136) internal successors, (17511), 11469 states have internal predecessors, (17511), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2024-11-09 06:51:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13073 states to 13073 states and 20015 transitions. [2024-11-09 06:51:36,319 INFO L78 Accepts]: Start accepts. Automaton has 13073 states and 20015 transitions. Word has length 137 [2024-11-09 06:51:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:36,319 INFO L471 AbstractCegarLoop]: Abstraction has 13073 states and 20015 transitions. [2024-11-09 06:51:36,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13073 states and 20015 transitions. [2024-11-09 06:51:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:36,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:36,342 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:36,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 06:51:36,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:36,543 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:36,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:36,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1156300579, now seen corresponding path program 1 times [2024-11-09 06:51:36,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:36,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607477358] [2024-11-09 06:51:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:36,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:51:36,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:36,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607477358] [2024-11-09 06:51:36,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607477358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:36,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717521723] [2024-11-09 06:51:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:36,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:36,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:36,754 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:36,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:51:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:37,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:37,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:51:37,126 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:37,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717521723] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:37,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:37,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:51:37,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913383607] [2024-11-09 06:51:37,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:37,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:37,133 INFO L87 Difference]: Start difference. First operand 13073 states and 20015 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:38,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:38,757 INFO L93 Difference]: Finished difference Result 35734 states and 53972 transitions. [2024-11-09 06:51:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:51:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2024-11-09 06:51:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:38,908 INFO L225 Difference]: With dead ends: 35734 [2024-11-09 06:51:38,909 INFO L226 Difference]: Without dead ends: 24307 [2024-11-09 06:51:38,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:38,966 INFO L432 NwaCegarLoop]: 3302 mSDtfsCounter, 3514 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3514 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:38,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3514 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:51:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24307 states. [2024-11-09 06:51:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24307 to 24241. [2024-11-09 06:51:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24241 states, 21035 states have (on average 1.4911813643926788) internal successors, (31367), 21101 states have internal predecessors, (31367), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2024-11-09 06:51:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24241 states to 24241 states and 36239 transitions. [2024-11-09 06:51:40,319 INFO L78 Accepts]: Start accepts. Automaton has 24241 states and 36239 transitions. Word has length 137 [2024-11-09 06:51:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:40,319 INFO L471 AbstractCegarLoop]: Abstraction has 24241 states and 36239 transitions. [2024-11-09 06:51:40,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 24241 states and 36239 transitions. [2024-11-09 06:51:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:40,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:40,355 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:40,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:51:40,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:40,555 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:40,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash 508668931, now seen corresponding path program 1 times [2024-11-09 06:51:40,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:40,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42639610] [2024-11-09 06:51:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:40,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:51:40,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:40,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42639610] [2024-11-09 06:51:40,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42639610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:40,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597733620] [2024-11-09 06:51:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:40,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:40,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:40,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:40,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:51:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:41,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:41,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 06:51:41,265 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:41,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597733620] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:41,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:41,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:51:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991679420] [2024-11-09 06:51:41,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:41,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:41,267 INFO L87 Difference]: Start difference. First operand 24241 states and 36239 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:43,488 INFO L93 Difference]: Finished difference Result 69046 states and 103060 transitions. [2024-11-09 06:51:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:51:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2024-11-09 06:51:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:43,762 INFO L225 Difference]: With dead ends: 69046 [2024-11-09 06:51:43,762 INFO L226 Difference]: Without dead ends: 46451 [2024-11-09 06:51:43,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:43,832 INFO L432 NwaCegarLoop]: 3302 mSDtfsCounter, 3526 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:43,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3526 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:51:43,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46451 states. [2024-11-09 06:51:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46451 to 46321. [2024-11-09 06:51:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46321 states, 40043 states have (on average 1.4657992657892764) internal successors, (58695), 40173 states have internal predecessors, (58695), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2024-11-09 06:51:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46321 states to 46321 states and 68175 transitions. [2024-11-09 06:51:46,504 INFO L78 Accepts]: Start accepts. Automaton has 46321 states and 68175 transitions. Word has length 137 [2024-11-09 06:51:46,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:46,505 INFO L471 AbstractCegarLoop]: Abstraction has 46321 states and 68175 transitions. [2024-11-09 06:51:46,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:51:46,505 INFO L276 IsEmpty]: Start isEmpty. Operand 46321 states and 68175 transitions. [2024-11-09 06:51:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 06:51:46,568 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:46,569 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 06:51:46,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:51:46,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:46,771 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:46,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2066003741, now seen corresponding path program 1 times [2024-11-09 06:51:46,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:46,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419520104] [2024-11-09 06:51:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:46,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 06:51:47,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:47,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419520104] [2024-11-09 06:51:47,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419520104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:47,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:51:47,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:51:47,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970667607] [2024-11-09 06:51:47,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:47,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:51:47,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:51:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:51:47,543 INFO L87 Difference]: Start difference. First operand 46321 states and 68175 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 06:51:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:51:52,353 INFO L93 Difference]: Finished difference Result 145781 states and 213585 transitions. [2024-11-09 06:51:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:51:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2024-11-09 06:51:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:51:52,930 INFO L225 Difference]: With dead ends: 145781 [2024-11-09 06:51:52,931 INFO L226 Difference]: Without dead ends: 101107 [2024-11-09 06:51:53,062 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:51:53,063 INFO L432 NwaCegarLoop]: 3304 mSDtfsCounter, 4145 mSDsluCounter, 6590 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4166 SdHoareTripleChecker+Valid, 9894 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:51:53,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4166 Valid, 9894 Invalid, 1044 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [132 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 06:51:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101107 states. [2024-11-09 06:51:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101107 to 89457. [2024-11-09 06:51:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89457 states, 77163 states have (on average 1.4490753340331506) internal successors, (111815), 77421 states have internal predecessors, (111815), 9220 states have call successors, (9220), 3072 states have call predecessors, (9220), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2024-11-09 06:51:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89457 states to 89457 states and 130255 transitions. [2024-11-09 06:51:57,452 INFO L78 Accepts]: Start accepts. Automaton has 89457 states and 130255 transitions. Word has length 137 [2024-11-09 06:51:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:51:57,454 INFO L471 AbstractCegarLoop]: Abstraction has 89457 states and 130255 transitions. [2024-11-09 06:51:57,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 06:51:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 89457 states and 130255 transitions. [2024-11-09 06:51:57,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-09 06:51:57,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:51:57,586 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:51:57,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:51:57,587 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:51:57,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:51:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -453430494, now seen corresponding path program 1 times [2024-11-09 06:51:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:51:57,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568157464] [2024-11-09 06:51:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:57,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:51:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 06:51:57,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:51:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568157464] [2024-11-09 06:51:57,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568157464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:51:57,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937620565] [2024-11-09 06:51:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:51:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:51:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:51:57,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:51:57,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:51:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:51:58,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:51:58,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:51:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 06:51:58,247 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:51:58,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937620565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:51:58,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:51:58,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 06:51:58,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523000608] [2024-11-09 06:51:58,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:51:58,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:51:58,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:51:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:51:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:51:58,249 INFO L87 Difference]: Start difference. First operand 89457 states and 130255 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:52:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:52:02,487 INFO L93 Difference]: Finished difference Result 158963 states and 233808 transitions. [2024-11-09 06:52:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:52:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 160 [2024-11-09 06:52:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:52:03,353 INFO L225 Difference]: With dead ends: 158963 [2024-11-09 06:52:03,353 INFO L226 Difference]: Without dead ends: 114417 [2024-11-09 06:52:03,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:52:03,494 INFO L432 NwaCegarLoop]: 3445 mSDtfsCounter, 137 mSDsluCounter, 3314 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 6759 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:52:03,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 6759 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:52:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114417 states. [2024-11-09 06:52:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114417 to 108529. [2024-11-09 06:52:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108529 states, 95723 states have (on average 1.4783385393270165) internal successors, (141511), 95981 states have internal predecessors, (141511), 9476 states have call successors, (9476), 3328 states have call predecessors, (9476), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2024-11-09 06:52:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108529 states to 108529 states and 160463 transitions. [2024-11-09 06:52:08,808 INFO L78 Accepts]: Start accepts. Automaton has 108529 states and 160463 transitions. Word has length 160 [2024-11-09 06:52:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:52:08,808 INFO L471 AbstractCegarLoop]: Abstraction has 108529 states and 160463 transitions. [2024-11-09 06:52:08,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:52:08,809 INFO L276 IsEmpty]: Start isEmpty. Operand 108529 states and 160463 transitions. [2024-11-09 06:52:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-09 06:52:09,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:52:09,112 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:52:09,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:52:09,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:52:09,314 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:52:09,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:52:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1020320991, now seen corresponding path program 1 times [2024-11-09 06:52:09,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:52:09,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42292290] [2024-11-09 06:52:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:52:09,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:52:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:52:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-09 06:52:09,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:52:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42292290] [2024-11-09 06:52:09,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42292290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:52:09,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132749594] [2024-11-09 06:52:09,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:52:09,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:52:09,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:52:09,704 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:52:09,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d05ccd9-dc0d-4ccb-9d28-f130aea1137a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:52:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:52:10,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:52:10,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:52:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 06:52:10,265 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:52:10,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132749594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:52:10,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:52:10,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-09 06:52:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693131110] [2024-11-09 06:52:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:52:10,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:52:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:52:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:52:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:52:10,267 INFO L87 Difference]: Start difference. First operand 108529 states and 160463 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)