./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ --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 216404335c43b82447a03ad9d88ac8bc18e7528b04f40169d87fb26955d8753c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:09:54,008 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:09:54,157 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:09:54,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:09:54,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:09:54,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:09:54,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:09:54,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:09:54,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:09:54,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:09:54,208 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:09:54,210 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:09:54,210 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:09:54,212 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:09:54,212 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:09:54,212 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:09:54,213 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:09:54,213 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:09:54,214 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:09:54,214 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:09:54,215 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:09:54,215 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:09:54,216 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:09:54,217 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:09:54,217 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:09:54,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:09:54,218 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:09:54,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:09:54,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:09:54,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:09:54,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:09:54,221 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:09:54,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:09:54,221 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:09:54,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:09:54,222 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:09:54,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:09:54,222 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:09:54,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:09:54,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:09:54,223 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:09:54,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:09:54,224 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:09:54,224 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:09:54,225 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:09:54,225 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_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 216404335c43b82447a03ad9d88ac8bc18e7528b04f40169d87fb26955d8753c [2023-11-19 05:09:54,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:09:54,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:09:54,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:09:54,575 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:09:54,576 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:09:54,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c [2023-11-19 05:09:57,563 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:09:58,403 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:09:58,404 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c [2023-11-19 05:09:58,457 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/data/41a4e957b/9c295468f16e44d7aeeb7d6306a3f430/FLAGba6623b43 [2023-11-19 05:09:58,474 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/data/41a4e957b/9c295468f16e44d7aeeb7d6306a3f430 [2023-11-19 05:09:58,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:09:58,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:09:58,481 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:09:58,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:09:58,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:09:58,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:58" (1/1) ... [2023-11-19 05:09:58,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9048a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:58, skipping insertion in model container [2023-11-19 05:09:58,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:58" (1/1) ... [2023-11-19 05:09:58,901 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:10:01,268 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c[378560,378573] [2023-11-19 05:10:01,302 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c[383339,383352] [2023-11-19 05:10:01,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:10:01,682 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:10:02,926 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c[378560,378573] [2023-11-19 05:10:02,934 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/sv-benchmarks/c/combinations/Problem05_label42+token_ring.13.cil-2.c[383339,383352] [2023-11-19 05:10:02,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:10:03,038 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:10:03,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03 WrapperNode [2023-11-19 05:10:03,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:10:03,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:10:03,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:10:03,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:10:03,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:03,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:03,600 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13288 [2023-11-19 05:10:03,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:10:03,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:10:03,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:10:03,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:10:03,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:03,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:03,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:03,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:03,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:04,017 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:04,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:04,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:04,299 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:10:04,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:10:04,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:10:04,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:10:04,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (1/1) ... [2023-11-19 05:10:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:10:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:04,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:10:04,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:10:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:10:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:10:04,465 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:10:04,467 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:10:04,467 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:10:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:10:04,468 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:10:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:10:04,468 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:10:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:10:04,468 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:10:04,469 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:10:04,469 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:10:04,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:10:04,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:10:04,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:10:04,674 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:10:04,676 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:10:13,984 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:10:17,156 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:10:17,156 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-19 05:10:17,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:17 BoogieIcfgContainer [2023-11-19 05:10:17,172 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:10:17,176 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:10:17,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:10:17,179 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:10:17,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:09:58" (1/3) ... [2023-11-19 05:10:17,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f92691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:17, skipping insertion in model container [2023-11-19 05:10:17,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:03" (2/3) ... [2023-11-19 05:10:17,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f92691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:17, skipping insertion in model container [2023-11-19 05:10:17,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:17" (3/3) ... [2023-11-19 05:10:17,182 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.13.cil-2.c [2023-11-19 05:10:17,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:10:17,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:10:17,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:10:17,340 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4fedcf3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:10:17,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:10:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 1856 states, 1820 states have (on average 1.9467032967032967) internal successors, (3543), 1823 states have internal predecessors, (3543), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 05:10:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:10:17,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:17,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:17,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:17,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:17,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2141965996, now seen corresponding path program 1 times [2023-11-19 05:10:17,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:17,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571201135] [2023-11-19 05:10:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:17,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:10:18,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571201135] [2023-11-19 05:10:18,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571201135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:18,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:18,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:10:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364380948] [2023-11-19 05:10:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:18,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:10:18,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:10:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:10:18,340 INFO L87 Difference]: Start difference. First operand has 1856 states, 1820 states have (on average 1.9467032967032967) internal successors, (3543), 1823 states have internal predecessors, (3543), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:10:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:19,483 INFO L93 Difference]: Finished difference Result 3908 states and 7525 transitions. [2023-11-19 05:10:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:10:19,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 70 [2023-11-19 05:10:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:19,511 INFO L225 Difference]: With dead ends: 3908 [2023-11-19 05:10:19,511 INFO L226 Difference]: Without dead ends: 2051 [2023-11-19 05:10:19,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:10:19,524 INFO L413 NwaCegarLoop]: 3569 mSDtfsCounter, 3840 mSDsluCounter, 3467 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3840 SdHoareTripleChecker+Valid, 7036 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:19,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3840 Valid, 7036 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:10:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2023-11-19 05:10:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 2050. [2023-11-19 05:10:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1986 states have (on average 1.903323262839879) internal successors, (3780), 1989 states have internal predecessors, (3780), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 05:10:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3880 transitions. [2023-11-19 05:10:19,704 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3880 transitions. Word has length 70 [2023-11-19 05:10:19,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:19,704 INFO L495 AbstractCegarLoop]: Abstraction has 2050 states and 3880 transitions. [2023-11-19 05:10:19,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:10:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3880 transitions. [2023-11-19 05:10:19,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:19,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:19,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:19,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:10:19,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2097695014, now seen corresponding path program 1 times [2023-11-19 05:10:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:19,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921520255] [2023-11-19 05:10:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:19,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:10:20,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:20,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921520255] [2023-11-19 05:10:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921520255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532366486] [2023-11-19 05:10:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:20,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:20,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:20,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:10:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:20,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:10:20,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:10:20,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:20,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532366486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:20,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:10:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400812427] [2023-11-19 05:10:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:20,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:20,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:20,524 INFO L87 Difference]: Start difference. First operand 2050 states and 3880 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:21,090 INFO L93 Difference]: Finished difference Result 2851 states and 5109 transitions. [2023-11-19 05:10:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 144 [2023-11-19 05:10:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:21,109 INFO L225 Difference]: With dead ends: 2851 [2023-11-19 05:10:21,110 INFO L226 Difference]: Without dead ends: 2447 [2023-11-19 05:10:21,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:21,114 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 3539 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3539 SdHoareTripleChecker+Valid, 3627 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:21,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3539 Valid, 3627 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:10:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2023-11-19 05:10:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2443. [2023-11-19 05:10:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2323 states have (on average 1.8411536805854498) internal successors, (4277), 2327 states have internal predecessors, (4277), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-19 05:10:21,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 4465 transitions. [2023-11-19 05:10:21,213 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 4465 transitions. Word has length 144 [2023-11-19 05:10:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:21,214 INFO L495 AbstractCegarLoop]: Abstraction has 2443 states and 4465 transitions. [2023-11-19 05:10:21,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 4465 transitions. [2023-11-19 05:10:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:21,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:21,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:21,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:10:21,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 05:10:21,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:21,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1210589976, now seen corresponding path program 1 times [2023-11-19 05:10:21,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:21,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078570335] [2023-11-19 05:10:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:21,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:10:21,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:21,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078570335] [2023-11-19 05:10:21,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078570335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788864758] [2023-11-19 05:10:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:21,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:21,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:21,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:10:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:22,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:10:22,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:10:22,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:22,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788864758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:22,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:10:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396277893] [2023-11-19 05:10:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:22,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:22,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:22,111 INFO L87 Difference]: Start difference. First operand 2443 states and 4465 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:22,704 INFO L93 Difference]: Finished difference Result 4024 states and 6884 transitions. [2023-11-19 05:10:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:22,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:10:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:22,727 INFO L225 Difference]: With dead ends: 4024 [2023-11-19 05:10:22,727 INFO L226 Difference]: Without dead ends: 3227 [2023-11-19 05:10:22,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:22,733 INFO L413 NwaCegarLoop]: 3371 mSDtfsCounter, 3551 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:22,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3551 Valid, 3625 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:10:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2023-11-19 05:10:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3221. [2023-11-19 05:10:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2991 states have (on average 1.7582748244734203) internal successors, (5259), 2997 states have internal predecessors, (5259), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-19 05:10:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 5619 transitions. [2023-11-19 05:10:22,902 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 5619 transitions. Word has length 144 [2023-11-19 05:10:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:22,903 INFO L495 AbstractCegarLoop]: Abstraction has 3221 states and 5619 transitions. [2023-11-19 05:10:22,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 5619 transitions. [2023-11-19 05:10:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:22,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:22,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:22,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:23,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 05:10:23,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:23,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash -808312234, now seen corresponding path program 1 times [2023-11-19 05:10:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:23,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121963307] [2023-11-19 05:10:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:23,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:10:23,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:23,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121963307] [2023-11-19 05:10:23,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121963307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:23,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092971813] [2023-11-19 05:10:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:23,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:23,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:23,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:23,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:10:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:23,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:10:23,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-19 05:10:23,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092971813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:23,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:23,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:10:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640747583] [2023-11-19 05:10:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:23,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:23,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:23,823 INFO L87 Difference]: Start difference. First operand 3221 states and 5619 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:24,437 INFO L93 Difference]: Finished difference Result 6346 states and 10384 transitions. [2023-11-19 05:10:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:10:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:24,467 INFO L225 Difference]: With dead ends: 6346 [2023-11-19 05:10:24,467 INFO L226 Difference]: Without dead ends: 4771 [2023-11-19 05:10:24,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:24,476 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 3557 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3557 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3557 Valid, 3605 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:10:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2023-11-19 05:10:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 4761. [2023-11-19 05:10:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 4315 states have (on average 1.6683661645422942) internal successors, (7199), 4325 states have internal predecessors, (7199), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-19 05:10:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 7895 transitions. [2023-11-19 05:10:24,675 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 7895 transitions. Word has length 144 [2023-11-19 05:10:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:24,675 INFO L495 AbstractCegarLoop]: Abstraction has 4761 states and 7895 transitions. [2023-11-19 05:10:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 7895 transitions. [2023-11-19 05:10:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:24,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:24,686 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:24,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:24,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 05:10:24,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:24,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1501772564, now seen corresponding path program 1 times [2023-11-19 05:10:24,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:24,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319015813] [2023-11-19 05:10:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:10:25,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:25,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319015813] [2023-11-19 05:10:25,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319015813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:25,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043839815] [2023-11-19 05:10:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:25,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:25,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:25,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:10:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:25,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:10:25,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 05:10:25,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043839815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:25,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:25,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:10:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176675615] [2023-11-19 05:10:25,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:25,515 INFO L87 Difference]: Start difference. First operand 4761 states and 7895 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:26,176 INFO L93 Difference]: Finished difference Result 10942 states and 17284 transitions. [2023-11-19 05:10:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:26,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 144 [2023-11-19 05:10:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:26,229 INFO L225 Difference]: With dead ends: 10942 [2023-11-19 05:10:26,229 INFO L226 Difference]: Without dead ends: 7827 [2023-11-19 05:10:26,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:26,243 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3545 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3545 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:26,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3545 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:10:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7827 states. [2023-11-19 05:10:26,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7827 to 7809. [2023-11-19 05:10:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6939 states have (on average 1.5897103329009943) internal successors, (11031), 6957 states have internal predecessors, (11031), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-19 05:10:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 12383 transitions. [2023-11-19 05:10:26,587 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 12383 transitions. Word has length 144 [2023-11-19 05:10:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:26,588 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 12383 transitions. [2023-11-19 05:10:26,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 12383 transitions. [2023-11-19 05:10:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:26,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:26,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:26,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:26,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:26,817 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:26,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1802830034, now seen corresponding path program 1 times [2023-11-19 05:10:26,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:26,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123668769] [2023-11-19 05:10:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:26,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:10:27,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:27,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123668769] [2023-11-19 05:10:27,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123668769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:27,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581398377] [2023-11-19 05:10:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:27,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:27,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:27,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:10:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:27,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:10:27,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 05:10:27,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581398377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:27,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:27,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:10:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538686237] [2023-11-19 05:10:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:27,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:27,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:27,437 INFO L87 Difference]: Start difference. First operand 7809 states and 12383 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:28,237 INFO L93 Difference]: Finished difference Result 20038 states and 30884 transitions. [2023-11-19 05:10:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 144 [2023-11-19 05:10:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:28,327 INFO L225 Difference]: With dead ends: 20038 [2023-11-19 05:10:28,328 INFO L226 Difference]: Without dead ends: 13875 [2023-11-19 05:10:28,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:28,360 INFO L413 NwaCegarLoop]: 3365 mSDtfsCounter, 3560 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:28,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 3619 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:10:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13875 states. [2023-11-19 05:10:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13875 to 13841. [2023-11-19 05:10:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13841 states, 12139 states have (on average 1.5321690419309664) internal successors, (18599), 12173 states have internal predecessors, (18599), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2023-11-19 05:10:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 21231 transitions. [2023-11-19 05:10:28,970 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 21231 transitions. Word has length 144 [2023-11-19 05:10:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:28,970 INFO L495 AbstractCegarLoop]: Abstraction has 13841 states and 21231 transitions. [2023-11-19 05:10:28,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 21231 transitions. [2023-11-19 05:10:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:29,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:29,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:29,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:29,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:10:29,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:29,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:29,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1016903852, now seen corresponding path program 1 times [2023-11-19 05:10:29,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:29,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543137791] [2023-11-19 05:10:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:29,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:10:29,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543137791] [2023-11-19 05:10:29,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543137791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005260848] [2023-11-19 05:10:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:29,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:29,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:29,437 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:29,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:10:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:29,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:10:29,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:10:29,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:29,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005260848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:29,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:29,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:10:29,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57939991] [2023-11-19 05:10:29,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:29,792 INFO L87 Difference]: Start difference. First operand 13841 states and 21231 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:31,374 INFO L93 Difference]: Finished difference Result 38038 states and 57684 transitions. [2023-11-19 05:10:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:31,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 144 [2023-11-19 05:10:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:31,495 INFO L225 Difference]: With dead ends: 38038 [2023-11-19 05:10:31,496 INFO L226 Difference]: Without dead ends: 25843 [2023-11-19 05:10:31,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:31,555 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3530 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3530 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:31,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3530 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:10:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25843 states. [2023-11-19 05:10:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25843 to 25777. [2023-11-19 05:10:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 22443 states have (on average 1.494586285255982) internal successors, (33543), 22509 states have internal predecessors, (33543), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2023-11-19 05:10:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 38671 transitions. [2023-11-19 05:10:33,154 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 38671 transitions. Word has length 144 [2023-11-19 05:10:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:33,156 INFO L495 AbstractCegarLoop]: Abstraction has 25777 states and 38671 transitions. [2023-11-19 05:10:33,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 38671 transitions. [2023-11-19 05:10:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:33,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:33,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:33,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:10:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:10:33,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:33,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1753055914, now seen corresponding path program 1 times [2023-11-19 05:10:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:33,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296764581] [2023-11-19 05:10:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:10:33,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:33,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296764581] [2023-11-19 05:10:33,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296764581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:33,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670897029] [2023-11-19 05:10:33,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:33,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:33,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:33,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:33,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:10:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:34,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:10:34,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:10:34,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:34,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670897029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:34,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:34,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:10:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216123489] [2023-11-19 05:10:34,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:34,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:34,291 INFO L87 Difference]: Start difference. First operand 25777 states and 38671 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:36,383 INFO L93 Difference]: Finished difference Result 73654 states and 110484 transitions. [2023-11-19 05:10:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:10:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 144 [2023-11-19 05:10:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:36,608 INFO L225 Difference]: With dead ends: 73654 [2023-11-19 05:10:36,609 INFO L226 Difference]: Without dead ends: 49523 [2023-11-19 05:10:36,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:10:36,795 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3533 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:36,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:10:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49523 states. [2023-11-19 05:10:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49523 to 49393. [2023-11-19 05:10:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49393 states, 42859 states have (on average 1.4710329219067173) internal successors, (63047), 42989 states have internal predecessors, (63047), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2023-11-19 05:10:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49393 states to 49393 states and 73039 transitions. [2023-11-19 05:10:38,853 INFO L78 Accepts]: Start accepts. Automaton has 49393 states and 73039 transitions. Word has length 144 [2023-11-19 05:10:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:38,854 INFO L495 AbstractCegarLoop]: Abstraction has 49393 states and 73039 transitions. [2023-11-19 05:10:38,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:10:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 49393 states and 73039 transitions. [2023-11-19 05:10:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:10:38,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:38,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:38,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_876dbf8f-098d-420a-a4ff-ad5b2308eba6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0