./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 343a266e04a35949615e598ecd53205cd1ef95f44fcd29af6bf4976fff243198 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:39:37,024 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:39:37,157 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:39:37,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:39:37,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:39:37,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:39:37,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:39:37,210 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:39:37,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:39:37,216 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:39:37,217 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:39:37,218 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:39:37,219 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:39:37,221 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:39:37,221 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:39:37,222 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:39:37,222 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:39:37,223 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:39:37,223 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:39:37,224 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:39:37,224 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:39:37,225 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:39:37,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:39:37,227 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:39:37,227 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:39:37,228 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:39:37,228 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:39:37,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:39:37,229 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:39:37,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:39:37,232 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:39:37,232 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:39:37,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:39:37,233 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:39:37,233 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:39:37,234 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:39:37,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:39:37,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:37,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:39:37,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:39:37,236 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:39:37,237 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:39:37,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:39:37,237 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:39:37,238 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:39:37,238 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:39:37,239 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:39:37,239 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_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 343a266e04a35949615e598ecd53205cd1ef95f44fcd29af6bf4976fff243198 [2023-11-23 20:39:37,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:39:37,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:39:37,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:39:37,620 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:39:37,620 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:39:37,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c [2023-11-23 20:39:40,691 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:39:41,498 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:39:41,499 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c [2023-11-23 20:39:41,567 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/data/1030a65b1/fd7d0b2f5a4c40a1a5c1855f365c0644/FLAG64797f422 [2023-11-23 20:39:41,590 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/data/1030a65b1/fd7d0b2f5a4c40a1a5c1855f365c0644 [2023-11-23 20:39:41,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:39:41,597 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:39:41,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:41,601 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:39:41,607 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:39:41,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:41" (1/1) ... [2023-11-23 20:39:41,609 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30137b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:41, skipping insertion in model container [2023-11-23 20:39:41,609 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:41" (1/1) ... [2023-11-23 20:39:41,885 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:39:44,339 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_07a9c499-4438-412e-8552-956b48cfa15d/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[381679,381692] [2023-11-23 20:39:44,368 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_07a9c499-4438-412e-8552-956b48cfa15d/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[383339,383352] [2023-11-23 20:39:44,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:44,687 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:39:46,046 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_07a9c499-4438-412e-8552-956b48cfa15d/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[381679,381692] [2023-11-23 20:39:46,050 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_07a9c499-4438-412e-8552-956b48cfa15d/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[383339,383352] [2023-11-23 20:39:46,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:46,150 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:39:46,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46 WrapperNode [2023-11-23 20:39:46,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:46,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:46,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:39:46,153 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:39:46,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:46,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:46,693 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 12994 [2023-11-23 20:39:46,694 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:46,695 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:39:46,695 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:39:46,695 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:39:46,705 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:46,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:46,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:46,888 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:47,256 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:47,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:47,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:47,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:47,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:39:47,590 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:39:47,590 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:39:47,590 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:39:47,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (1/1) ... [2023-11-23 20:39:47,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:47,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:47,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:39:47,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:39:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:39:47,670 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 20:39:47,671 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 20:39:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:39:47,671 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:39:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 20:39:47,671 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 20:39:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-23 20:39:47,672 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-23 20:39:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 20:39:47,672 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 20:39:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 20:39:47,672 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 20:39:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 20:39:47,673 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 20:39:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:39:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:39:47,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:39:47,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:39:47,842 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:39:57,362 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:40:00,051 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:40:00,051 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-23 20:40:00,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:00 BoogieIcfgContainer [2023-11-23 20:40:00,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:40:00,057 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:40:00,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:40:00,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:40:00,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:39:41" (1/3) ... [2023-11-23 20:40:00,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbde7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:00, skipping insertion in model container [2023-11-23 20:40:00,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:46" (2/3) ... [2023-11-23 20:40:00,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bbde7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:00, skipping insertion in model container [2023-11-23 20:40:00,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:00" (3/3) ... [2023-11-23 20:40:00,066 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.08.cil-2.c [2023-11-23 20:40:00,087 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:40:00,087 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:40:00,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:40:00,197 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;@2f015d16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:40:00,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:40:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 1802 states, 1768 states have (on average 1.9592760180995474) internal successors, (3464), 1773 states have internal predecessors, (3464), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:40:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:40:00,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:00,225 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] [2023-11-23 20:40:00,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:00,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1936149253, now seen corresponding path program 1 times [2023-11-23 20:40:00,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:00,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344931431] [2023-11-23 20:40:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:00,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:40:00,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:00,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344931431] [2023-11-23 20:40:00,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344931431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:00,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:40:00,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:40:00,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009712227] [2023-11-23 20:40:00,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:00,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:40:00,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:00,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:40:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:40:00,958 INFO L87 Difference]: Start difference. First operand has 1802 states, 1768 states have (on average 1.9592760180995474) internal successors, (3464), 1773 states have internal predecessors, (3464), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:40:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:02,110 INFO L93 Difference]: Finished difference Result 3739 states and 7250 transitions. [2023-11-23 20:40:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:40:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2023-11-23 20:40:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:02,138 INFO L225 Difference]: With dead ends: 3739 [2023-11-23 20:40:02,138 INFO L226 Difference]: Without dead ends: 1936 [2023-11-23 20:40:02,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:40:02,151 INFO L413 NwaCegarLoop]: 3416 mSDtfsCounter, 3673 mSDsluCounter, 3332 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3673 SdHoareTripleChecker+Valid, 6748 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:02,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3673 Valid, 6748 Invalid, 680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:40:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2023-11-23 20:40:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1935. [2023-11-23 20:40:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1879 states have (on average 1.9244278871740288) internal successors, (3616), 1883 states have internal predecessors, (3616), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-23 20:40:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 3698 transitions. [2023-11-23 20:40:02,306 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 3698 transitions. Word has length 56 [2023-11-23 20:40:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:02,307 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 3698 transitions. [2023-11-23 20:40:02,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:40:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 3698 transitions. [2023-11-23 20:40:02,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 20:40:02,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:02,316 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:02,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:40:02,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:02,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash 751198590, now seen corresponding path program 1 times [2023-11-23 20:40:02,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:02,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37848677] [2023-11-23 20:40:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:02,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:40:02,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37848677] [2023-11-23 20:40:02,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37848677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467165637] [2023-11-23 20:40:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:02,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:02,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:02,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:02,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:40:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:02,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:40:02,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 20:40:02,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:40:02,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467165637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:02,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:40:02,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:40:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306717554] [2023-11-23 20:40:02,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:02,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:02,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:02,957 INFO L87 Difference]: Start difference. First operand 1935 states and 3698 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:03,514 INFO L93 Difference]: Finished difference Result 2506 states and 4553 transitions. [2023-11-23 20:40:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:03,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-23 20:40:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:03,532 INFO L225 Difference]: With dead ends: 2506 [2023-11-23 20:40:03,532 INFO L226 Difference]: Without dead ends: 2217 [2023-11-23 20:40:03,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:03,536 INFO L413 NwaCegarLoop]: 3297 mSDtfsCounter, 3470 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3470 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:03,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3470 Valid, 3478 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:40:03,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2023-11-23 20:40:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2211. [2023-11-23 20:40:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2109 states have (on average 1.8724513987671882) internal successors, (3949), 2114 states have internal predecessors, (3949), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-23 20:40:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4099 transitions. [2023-11-23 20:40:03,626 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4099 transitions. Word has length 110 [2023-11-23 20:40:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:03,627 INFO L495 AbstractCegarLoop]: Abstraction has 2211 states and 4099 transitions. [2023-11-23 20:40:03,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4099 transitions. [2023-11-23 20:40:03,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 20:40:03,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:03,631 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:03,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:03,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:03,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:03,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash -159725794, now seen corresponding path program 1 times [2023-11-23 20:40:03,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:03,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135361645] [2023-11-23 20:40:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:40:04,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:04,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135361645] [2023-11-23 20:40:04,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135361645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:04,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600102857] [2023-11-23 20:40:04,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:04,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:04,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:40:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:04,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:40:04,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 20:40:04,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:40:04,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600102857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:04,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:40:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:40:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520816855] [2023-11-23 20:40:04,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:04,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:04,425 INFO L87 Difference]: Start difference. First operand 2211 states and 4099 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:05,098 INFO L93 Difference]: Finished difference Result 3328 states and 5766 transitions. [2023-11-23 20:40:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:05,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-23 20:40:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:05,117 INFO L225 Difference]: With dead ends: 3328 [2023-11-23 20:40:05,118 INFO L226 Difference]: Without dead ends: 2763 [2023-11-23 20:40:05,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:05,122 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3464 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:05,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3426 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:40:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2023-11-23 20:40:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2755. [2023-11-23 20:40:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2563 states have (on average 1.795942255169723) internal successors, (4603), 2570 states have internal predecessors, (4603), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-23 20:40:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4885 transitions. [2023-11-23 20:40:05,237 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4885 transitions. Word has length 110 [2023-11-23 20:40:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:05,238 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4885 transitions. [2023-11-23 20:40:05,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4885 transitions. [2023-11-23 20:40:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 20:40:05,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:05,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:05,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:05,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:05,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:05,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1571560258, now seen corresponding path program 1 times [2023-11-23 20:40:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091309721] [2023-11-23 20:40:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:40:05,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:05,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091309721] [2023-11-23 20:40:05,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091309721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959214541] [2023-11-23 20:40:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:05,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:05,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:05,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:05,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:40:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:05,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:40:05,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 20:40:05,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:40:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959214541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:05,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:40:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:40:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421741338] [2023-11-23 20:40:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:05,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:05,876 INFO L87 Difference]: Start difference. First operand 2755 states and 4885 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:06,467 INFO L93 Difference]: Finished difference Result 4948 states and 8142 transitions. [2023-11-23 20:40:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-23 20:40:06,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:06,496 INFO L225 Difference]: With dead ends: 4948 [2023-11-23 20:40:06,496 INFO L226 Difference]: Without dead ends: 3839 [2023-11-23 20:40:06,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:06,508 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3473 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:06,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 3426 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:40:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2023-11-23 20:40:06,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3827. [2023-11-23 20:40:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3459 states have (on average 1.7019369760046257) internal successors, (5887), 3470 states have internal predecessors, (5887), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2023-11-23 20:40:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 6425 transitions. [2023-11-23 20:40:06,714 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 6425 transitions. Word has length 110 [2023-11-23 20:40:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:06,715 INFO L495 AbstractCegarLoop]: Abstraction has 3827 states and 6425 transitions. [2023-11-23 20:40:06,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 6425 transitions. [2023-11-23 20:40:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 20:40:06,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:06,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:06,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:06,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:06,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash 978459422, now seen corresponding path program 1 times [2023-11-23 20:40:06,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:06,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110919250] [2023-11-23 20:40:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:40:07,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:07,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110919250] [2023-11-23 20:40:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110919250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:07,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689720781] [2023-11-23 20:40:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:07,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:07,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:07,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:07,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:40:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:07,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:40:07,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:40:07,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:40:07,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689720781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:07,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:40:07,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:40:07,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708528709] [2023-11-23 20:40:07,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:07,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:07,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:07,409 INFO L87 Difference]: Start difference. First operand 3827 states and 6425 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:08,060 INFO L93 Difference]: Finished difference Result 8140 states and 12794 transitions. [2023-11-23 20:40:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-23 20:40:08,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:08,100 INFO L225 Difference]: With dead ends: 8140 [2023-11-23 20:40:08,101 INFO L226 Difference]: Without dead ends: 5959 [2023-11-23 20:40:08,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:40:08,113 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3458 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:08,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3458 Valid, 3426 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:40:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5959 states. [2023-11-23 20:40:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5959 to 5939. [2023-11-23 20:40:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5227 states have (on average 1.6083795676296155) internal successors, (8407), 5246 states have internal predecessors, (8407), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2023-11-23 20:40:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9441 transitions. [2023-11-23 20:40:08,383 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9441 transitions. Word has length 110 [2023-11-23 20:40:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:08,384 INFO L495 AbstractCegarLoop]: Abstraction has 5939 states and 9441 transitions. [2023-11-23 20:40:08,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:40:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9441 transitions. [2023-11-23 20:40:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 20:40:08,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:08,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:08,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:08,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9c499-4438-412e-8552-956b48cfa15d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:08,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:08,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1875251010, now seen corresponding path program 1 times [2023-11-23 20:40:08,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:08,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991095694] [2023-11-23 20:40:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-23 20:40:08,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991095694] [2023-11-23 20:40:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991095694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:08,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:40:08,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:40:08,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153786213] [2023-11-23 20:40:08,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:08,772 INFO L87 Difference]: Start difference. First operand 5939 states and 9441 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:40:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:09,690 INFO L93 Difference]: Finished difference Result 9351 states and 14484 transitions. [2023-11-23 20:40:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:09,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2023-11-23 20:40:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:09,770 INFO L225 Difference]: With dead ends: 9351 [2023-11-23 20:40:09,771 INFO L226 Difference]: Without dead ends: 7139 [2023-11-23 20:40:09,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:09,782 INFO L413 NwaCegarLoop]: 3349 mSDtfsCounter, 99 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:09,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 6603 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:40:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2023-11-23 20:40:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 6803. [2023-11-23 20:40:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6803 states, 6059 states have (on average 1.606700775705562) internal successors, (9735), 6078 states have internal predecessors, (9735), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2023-11-23 20:40:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6803 states to 6803 states and 10801 transitions. [2023-11-23 20:40:10,103 INFO L78 Accepts]: Start accepts. Automaton has 6803 states and 10801 transitions. Word has length 110 [2023-11-23 20:40:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:10,104 INFO L495 AbstractCegarLoop]: Abstraction has 6803 states and 10801 transitions. [2023-11-23 20:40:10,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:40:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6803 states and 10801 transitions. [2023-11-23 20:40:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 20:40:10,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:10,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:10,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:40:10,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:10,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1483898030, now seen corresponding path program 1 times [2023-11-23 20:40:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:10,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167447881] [2023-11-23 20:40:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:10,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-23 20:40:10,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:10,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167447881] [2023-11-23 20:40:10,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167447881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:10,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:40:10,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:40:10,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389409499] [2023-11-23 20:40:10,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:10,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:10,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:10,261 INFO L87 Difference]: Start difference. First operand 6803 states and 10801 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:40:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:11,038 INFO L93 Difference]: Finished difference Result 16972 states and 25882 transitions. [2023-11-23 20:40:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-23 20:40:11,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:11,088 INFO L225 Difference]: With dead ends: 16972 [2023-11-23 20:40:11,089 INFO L226 Difference]: Without dead ends: 11815 [2023-11-23 20:40:11,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:11,109 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3459 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:11,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:40:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11815 states. [2023-11-23 20:40:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11815 to 11763. [2023-11-23 20:40:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 10315 states have (on average 1.5394086282113426) internal successors, (15879), 10350 states have internal predecessors, (15879), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2023-11-23 20:40:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 17937 transitions. [2023-11-23 20:40:11,633 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 17937 transitions. Word has length 149 [2023-11-23 20:40:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:11,635 INFO L495 AbstractCegarLoop]: Abstraction has 11763 states and 17937 transitions. [2023-11-23 20:40:11,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:40:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 17937 transitions. [2023-11-23 20:40:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 20:40:11,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:11,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:11,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:40:11,676 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:11,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1622544186, now seen corresponding path program 1 times [2023-11-23 20:40:11,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:11,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292599110] [2023-11-23 20:40:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:11,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-23 20:40:11,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:11,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292599110] [2023-11-23 20:40:11,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292599110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:11,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:40:11,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:40:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013195184] [2023-11-23 20:40:11,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:11,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:11,950 INFO L87 Difference]: Start difference. First operand 11763 states and 17937 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:40:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:13,273 INFO L93 Difference]: Finished difference Result 31708 states and 47290 transitions. [2023-11-23 20:40:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-23 20:40:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:13,374 INFO L225 Difference]: With dead ends: 31708 [2023-11-23 20:40:13,374 INFO L226 Difference]: Without dead ends: 21591 [2023-11-23 20:40:13,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:13,417 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3461 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:13,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:40:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21591 states. [2023-11-23 20:40:14,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21591 to 21491. [2023-11-23 20:40:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21491 states, 18667 states have (on average 1.4917769325547758) internal successors, (27847), 18734 states have internal predecessors, (27847), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2023-11-23 20:40:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21491 states to 21491 states and 31825 transitions. [2023-11-23 20:40:14,662 INFO L78 Accepts]: Start accepts. Automaton has 21491 states and 31825 transitions. Word has length 149 [2023-11-23 20:40:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:14,662 INFO L495 AbstractCegarLoop]: Abstraction has 21491 states and 31825 transitions. [2023-11-23 20:40:14,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:40:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 21491 states and 31825 transitions. [2023-11-23 20:40:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 20:40:14,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:14,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:40:14,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:14,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1499265648, now seen corresponding path program 1 times [2023-11-23 20:40:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566267953] [2023-11-23 20:40:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-23 20:40:14,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566267953] [2023-11-23 20:40:14,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566267953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:14,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:40:14,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:40:14,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773100691] [2023-11-23 20:40:14,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:14,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:14,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:14,845 INFO L87 Difference]: Start difference. First operand 21491 states and 31825 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:40:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:16,499 INFO L93 Difference]: Finished difference Result 60604 states and 88922 transitions. [2023-11-23 20:40:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:40:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-23 20:40:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:16,666 INFO L225 Difference]: With dead ends: 60604 [2023-11-23 20:40:16,666 INFO L226 Difference]: Without dead ends: 40759 [2023-11-23 20:40:16,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:16,724 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3463 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:16,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:40:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40759 states. [2023-11-23 20:40:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40759 to 40563. [2023-11-23 20:40:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40563 states, 35051 states have (on average 1.4591024507146728) internal successors, (51143), 35182 states have internal predecessors, (51143), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2023-11-23 20:40:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40563 states to 40563 states and 58833 transitions. [2023-11-23 20:40:18,392 INFO L78 Accepts]: Start accepts. Automaton has 40563 states and 58833 transitions. Word has length 149 [2023-11-23 20:40:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:18,392 INFO L495 AbstractCegarLoop]: Abstraction has 40563 states and 58833 transitions. [2023-11-23 20:40:18,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:40:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 40563 states and 58833 transitions. [2023-11-23 20:40:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 20:40:18,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:18,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:18,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:40:18,517 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:18,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1484956503, now seen corresponding path program 1 times [2023-11-23 20:40:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:18,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706163170] [2023-11-23 20:40:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-23 20:40:18,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:18,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706163170] [2023-11-23 20:40:18,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706163170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:40:18,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:40:18,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:40:18,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289672749] [2023-11-23 20:40:18,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:40:18,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:40:18,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:40:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:40:18,925 INFO L87 Difference]: Start difference. First operand 40563 states and 58833 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)