./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh --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 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:02:09,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:02:09,353 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:02:09,357 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:02:09,358 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:02:09,383 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:02:09,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:02:09,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:02:09,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:02:09,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:02:09,385 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:02:09,386 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:02:09,386 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:02:09,387 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:02:09,387 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:02:09,388 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:02:09,388 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:02:09,389 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:02:09,389 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:02:09,390 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:02:09,390 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:02:09,391 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:02:09,392 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:02:09,392 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:02:09,393 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:02:09,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:02:09,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:02:09,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:02:09,394 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:02:09,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:02:09,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:02:09,396 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:02:09,396 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:02:09,396 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:02:09,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:02:09,397 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:02:09,397 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:02:09,397 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:02:09,397 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:02:09,398 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:02:09,398 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:02:09,398 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:02:09,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:02:09,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:02:09,399 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:02:09,399 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:02:09,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:02:09,399 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_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 [2023-12-02 14:02:09,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:02:09,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:02:09,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:02:09,634 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:02:09,635 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:02:09,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2023-12-02 14:02:12,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:02:12,576 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:02:12,577 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2023-12-02 14:02:12,593 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/data/87fe7bdf0/bfa6c22672c54d828b635dab67a405ee/FLAGb77fd9ce5 [2023-12-02 14:02:12,605 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/data/87fe7bdf0/bfa6c22672c54d828b635dab67a405ee [2023-12-02 14:02:12,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:02:12,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:02:12,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:02:12,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:02:12,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:02:12,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:02:12" (1/1) ... [2023-12-02 14:02:12,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f668cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:12, skipping insertion in model container [2023-12-02 14:02:12,616 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:02:12" (1/1) ... [2023-12-02 14:02:12,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:02:12,785 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_0992c0be-f786-4fa0-968d-29ff4307b24a/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2023-12-02 14:02:12,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:02:12,916 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:02:12,925 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_0992c0be-f786-4fa0-968d-29ff4307b24a/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2023-12-02 14:02:12,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:02:13,005 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:02:13,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13 WrapperNode [2023-12-02 14:02:13,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:02:13,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:02:13,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:02:13,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:02:13,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,076 INFO L138 Inliner]: procedures = 50, calls = 65, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 825 [2023-12-02 14:02:13,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:02:13,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:02:13,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:02:13,078 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:02:13,088 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,129 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:02:13,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:02:13,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:02:13,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:02:13,142 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (1/1) ... [2023-12-02 14:02:13,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:02:13,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:13,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:02:13,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:02:13,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:02:13,205 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 14:02:13,206 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 14:02:13,206 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 14:02:13,206 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 14:02:13,206 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 14:02:13,206 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 14:02:13,206 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-12-02 14:02:13,206 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-12-02 14:02:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 14:02:13,207 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 14:02:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 14:02:13,207 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 14:02:13,207 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 14:02:13,207 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 14:02:13,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:02:13,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:02:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:02:13,328 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:02:13,331 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:02:13,992 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:02:14,489 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:02:14,489 INFO L309 CfgBuilder]: Removed 14 assume(true) statements. [2023-12-02 14:02:14,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:02:14 BoogieIcfgContainer [2023-12-02 14:02:14,491 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:02:14,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:02:14,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:02:14,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:02:14,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:02:12" (1/3) ... [2023-12-02 14:02:14,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5dfbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:02:14, skipping insertion in model container [2023-12-02 14:02:14,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:02:13" (2/3) ... [2023-12-02 14:02:14,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5dfbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:02:14, skipping insertion in model container [2023-12-02 14:02:14,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:02:14" (3/3) ... [2023-12-02 14:02:14,500 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-1.c [2023-12-02 14:02:14,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:02:14,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:02:14,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:02:14,582 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;@21c1d2e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:02:14,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:02:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 159 states have (on average 1.5220125786163523) internal successors, (242), 163 states have internal predecessors, (242), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-02 14:02:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 14:02:14,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:14,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:14,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:14,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1717771517, now seen corresponding path program 1 times [2023-12-02 14:02:14,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:14,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223878700] [2023-12-02 14:02:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:14,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:02:15,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:15,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223878700] [2023-12-02 14:02:15,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223878700] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:15,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:15,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:02:15,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399896397] [2023-12-02 14:02:15,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:15,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:02:15,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:02:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:02:15,096 INFO L87 Difference]: Start difference. First operand has 195 states, 159 states have (on average 1.5220125786163523) internal successors, (242), 163 states have internal predecessors, (242), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-12-02 14:02:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:15,583 INFO L93 Difference]: Finished difference Result 561 states and 882 transitions. [2023-12-02 14:02:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:02:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 64 [2023-12-02 14:02:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:15,599 INFO L225 Difference]: With dead ends: 561 [2023-12-02 14:02:15,599 INFO L226 Difference]: Without dead ends: 367 [2023-12-02 14:02:15,605 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 [2023-12-02 14:02:15,609 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 507 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:15,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 814 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:02:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-12-02 14:02:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 366. [2023-12-02 14:02:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 305 states have (on average 1.4754098360655739) internal successors, (450), 308 states have internal predecessors, (450), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 14:02:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 544 transitions. [2023-12-02 14:02:15,689 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 544 transitions. Word has length 64 [2023-12-02 14:02:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:15,690 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 544 transitions. [2023-12-02 14:02:15,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-12-02 14:02:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 544 transitions. [2023-12-02 14:02:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 14:02:15,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:15,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:15,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:02:15,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:15,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:15,701 INFO L85 PathProgramCache]: Analyzing trace with hash 930675013, now seen corresponding path program 1 times [2023-12-02 14:02:15,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:15,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445180638] [2023-12-02 14:02:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:15,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:16,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:16,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445180638] [2023-12-02 14:02:16,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445180638] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:16,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617853167] [2023-12-02 14:02:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:16,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:16,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:16,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:16,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:02:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:16,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:16,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 14:02:16,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617853167] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:16,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:16,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581370317] [2023-12-02 14:02:16,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:16,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:16,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:16,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:16,370 INFO L87 Difference]: Start difference. First operand 366 states and 544 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:16,549 INFO L93 Difference]: Finished difference Result 1081 states and 1633 transitions. [2023-12-02 14:02:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:16,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2023-12-02 14:02:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:16,558 INFO L225 Difference]: With dead ends: 1081 [2023-12-02 14:02:16,558 INFO L226 Difference]: Without dead ends: 720 [2023-12-02 14:02:16,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:16,562 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 263 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:16,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 525 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-12-02 14:02:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 714. [2023-12-02 14:02:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 601 states have (on average 1.4725457570715474) internal successors, (885), 605 states have internal predecessors, (885), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2023-12-02 14:02:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1059 transitions. [2023-12-02 14:02:16,618 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1059 transitions. Word has length 130 [2023-12-02 14:02:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:16,618 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1059 transitions. [2023-12-02 14:02:16,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 14:02:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1059 transitions. [2023-12-02 14:02:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 14:02:16,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:16,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:16,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:02:16,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:16,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:16,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash 474809411, now seen corresponding path program 1 times [2023-12-02 14:02:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:16,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759945318] [2023-12-02 14:02:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:16,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:17,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:17,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759945318] [2023-12-02 14:02:17,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759945318] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:17,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114188045] [2023-12-02 14:02:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:17,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:17,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:17,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:17,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:02:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:17,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:17,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 14:02:17,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114188045] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:17,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:17,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:17,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865085042] [2023-12-02 14:02:17,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:17,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:17,319 INFO L87 Difference]: Start difference. First operand 714 states and 1059 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2023-12-02 14:02:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:17,498 INFO L93 Difference]: Finished difference Result 2119 states and 3194 transitions. [2023-12-02 14:02:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 130 [2023-12-02 14:02:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:17,510 INFO L225 Difference]: With dead ends: 2119 [2023-12-02 14:02:17,511 INFO L226 Difference]: Without dead ends: 1410 [2023-12-02 14:02:17,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:17,516 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 260 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:17,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2023-12-02 14:02:17,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1402. [2023-12-02 14:02:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1187 states have (on average 1.468407750631845) internal successors, (1743), 1193 states have internal predecessors, (1743), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2023-12-02 14:02:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 2073 transitions. [2023-12-02 14:02:17,602 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 2073 transitions. Word has length 130 [2023-12-02 14:02:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:17,602 INFO L495 AbstractCegarLoop]: Abstraction has 1402 states and 2073 transitions. [2023-12-02 14:02:17,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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) [2023-12-02 14:02:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 2073 transitions. [2023-12-02 14:02:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 14:02:17,607 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:17,607 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:17,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:02:17,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:17,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:17,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:17,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1440156165, now seen corresponding path program 1 times [2023-12-02 14:02:17,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:17,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566899331] [2023-12-02 14:02:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:17,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:17,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:17,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566899331] [2023-12-02 14:02:17,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566899331] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:17,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951629092] [2023-12-02 14:02:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:17,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:17,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:17,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:17,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:02:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:18,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:18,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 14:02:18,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:18,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951629092] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:18,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:18,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857388337] [2023-12-02 14:02:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:18,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:18,256 INFO L87 Difference]: Start difference. First operand 1402 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2023-12-02 14:02:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:18,501 INFO L93 Difference]: Finished difference Result 4171 states and 6266 transitions. [2023-12-02 14:02:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:18,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 130 [2023-12-02 14:02:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:18,520 INFO L225 Difference]: With dead ends: 4171 [2023-12-02 14:02:18,521 INFO L226 Difference]: Without dead ends: 2774 [2023-12-02 14:02:18,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:18,528 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 248 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:18,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:18,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2023-12-02 14:02:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2762. [2023-12-02 14:02:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2347 states have (on average 1.4635705155517682) internal successors, (3435), 2357 states have internal predecessors, (3435), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2023-12-02 14:02:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 4069 transitions. [2023-12-02 14:02:18,676 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 4069 transitions. Word has length 130 [2023-12-02 14:02:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:18,677 INFO L495 AbstractCegarLoop]: Abstraction has 2762 states and 4069 transitions. [2023-12-02 14:02:18,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2023-12-02 14:02:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 4069 transitions. [2023-12-02 14:02:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 14:02:18,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:18,686 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:18,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 14:02:18,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:18,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:18,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:18,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1543888185, now seen corresponding path program 1 times [2023-12-02 14:02:18,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:18,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673939807] [2023-12-02 14:02:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:18,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:19,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:19,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673939807] [2023-12-02 14:02:19,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673939807] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:19,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264807562] [2023-12-02 14:02:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:19,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:19,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:19,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:19,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:02:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:19,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:19,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 14:02:19,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:19,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264807562] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:19,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905090050] [2023-12-02 14:02:19,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:19,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:19,373 INFO L87 Difference]: Start difference. First operand 2762 states and 4069 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (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) [2023-12-02 14:02:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:19,701 INFO L93 Difference]: Finished difference Result 8227 states and 12310 transitions. [2023-12-02 14:02:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (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 130 [2023-12-02 14:02:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:19,736 INFO L225 Difference]: With dead ends: 8227 [2023-12-02 14:02:19,736 INFO L226 Difference]: Without dead ends: 5470 [2023-12-02 14:02:19,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:19,747 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 254 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:19,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2023-12-02 14:02:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 5450. [2023-12-02 14:02:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 4643 states have (on average 1.4583243592504846) internal successors, (6771), 4661 states have internal predecessors, (6771), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2023-12-02 14:02:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 7997 transitions. [2023-12-02 14:02:20,031 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 7997 transitions. Word has length 130 [2023-12-02 14:02:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:20,031 INFO L495 AbstractCegarLoop]: Abstraction has 5450 states and 7997 transitions. [2023-12-02 14:02:20,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (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) [2023-12-02 14:02:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 7997 transitions. [2023-12-02 14:02:20,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 14:02:20,046 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:20,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:20,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:02:20,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:20,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:20,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:20,282 INFO L85 PathProgramCache]: Analyzing trace with hash 937697801, now seen corresponding path program 1 times [2023-12-02 14:02:20,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:20,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684878254] [2023-12-02 14:02:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:20,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:20,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684878254] [2023-12-02 14:02:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684878254] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275654225] [2023-12-02 14:02:20,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:20,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:20,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:20,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:20,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:02:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:20,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:20,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 14:02:20,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:20,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275654225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:20,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:20,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007612260] [2023-12-02 14:02:20,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:20,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:20,724 INFO L87 Difference]: Start difference. First operand 5450 states and 7997 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2023-12-02 14:02:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:21,215 INFO L93 Difference]: Finished difference Result 16243 states and 24198 transitions. [2023-12-02 14:02:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 130 [2023-12-02 14:02:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:21,288 INFO L225 Difference]: With dead ends: 16243 [2023-12-02 14:02:21,288 INFO L226 Difference]: Without dead ends: 10798 [2023-12-02 14:02:21,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:21,311 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 242 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:21,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10798 states. [2023-12-02 14:02:21,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10798 to 10762. [2023-12-02 14:02:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10762 states, 9187 states have (on average 1.452813758571895) internal successors, (13347), 9221 states have internal predecessors, (13347), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2023-12-02 14:02:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10762 states to 10762 states and 15725 transitions. [2023-12-02 14:02:21,857 INFO L78 Accepts]: Start accepts. Automaton has 10762 states and 15725 transitions. Word has length 130 [2023-12-02 14:02:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:21,857 INFO L495 AbstractCegarLoop]: Abstraction has 10762 states and 15725 transitions. [2023-12-02 14:02:21,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2023-12-02 14:02:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10762 states and 15725 transitions. [2023-12-02 14:02:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 14:02:21,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:21,909 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:21,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 14:02:22,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 14:02:22,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:22,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1097954379, now seen corresponding path program 1 times [2023-12-02 14:02:22,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:22,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904208170] [2023-12-02 14:02:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 14:02:22,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904208170] [2023-12-02 14:02:22,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904208170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060196801] [2023-12-02 14:02:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:22,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:22,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:02:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:22,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:22,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 14:02:22,508 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:22,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060196801] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:22,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:22,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 14:02:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072411318] [2023-12-02 14:02:22,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:22,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:22,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:22,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:22,511 INFO L87 Difference]: Start difference. First operand 10762 states and 15725 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2023-12-02 14:02:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:23,127 INFO L93 Difference]: Finished difference Result 32083 states and 47574 transitions. [2023-12-02 14:02:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:23,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 130 [2023-12-02 14:02:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:23,209 INFO L225 Difference]: With dead ends: 32083 [2023-12-02 14:02:23,209 INFO L226 Difference]: Without dead ends: 21326 [2023-12-02 14:02:23,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:23,239 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 236 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:23,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21326 states. [2023-12-02 14:02:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21326 to 21258. [2023-12-02 14:02:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21258 states, 18179 states have (on average 1.4471093019418009) internal successors, (26307), 18245 states have internal predecessors, (26307), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2023-12-02 14:02:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21258 states to 21258 states and 30925 transitions. [2023-12-02 14:02:23,969 INFO L78 Accepts]: Start accepts. Automaton has 21258 states and 30925 transitions. Word has length 130 [2023-12-02 14:02:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:23,969 INFO L495 AbstractCegarLoop]: Abstraction has 21258 states and 30925 transitions. [2023-12-02 14:02:23,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2023-12-02 14:02:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 21258 states and 30925 transitions. [2023-12-02 14:02:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 14:02:24,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:24,001 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:24,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:02:24,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 14:02:24,202 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:24,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1963843571, now seen corresponding path program 1 times [2023-12-02 14:02:24,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:24,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982412957] [2023-12-02 14:02:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 14:02:24,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:24,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982412957] [2023-12-02 14:02:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982412957] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:24,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:02:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719476141] [2023-12-02 14:02:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:02:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:02:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:24,789 INFO L87 Difference]: Start difference. First operand 21258 states and 30925 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:02:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:26,307 INFO L93 Difference]: Finished difference Result 66002 states and 96659 transitions. [2023-12-02 14:02:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:02:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2023-12-02 14:02:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:26,566 INFO L225 Difference]: With dead ends: 66002 [2023-12-02 14:02:26,566 INFO L226 Difference]: Without dead ends: 44750 [2023-12-02 14:02:26,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:02:26,614 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 775 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:26,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 710 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:02:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44750 states. [2023-12-02 14:02:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44750 to 41738. [2023-12-02 14:02:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41738 states, 35715 states have (on average 1.4408231835363292) internal successors, (51459), 35845 states have internal predecessors, (51459), 4486 states have call successors, (4486), 1537 states have call predecessors, (4486), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2023-12-02 14:02:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41738 states to 41738 states and 60429 transitions. [2023-12-02 14:02:28,561 INFO L78 Accepts]: Start accepts. Automaton has 41738 states and 60429 transitions. Word has length 130 [2023-12-02 14:02:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:28,562 INFO L495 AbstractCegarLoop]: Abstraction has 41738 states and 60429 transitions. [2023-12-02 14:02:28,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:02:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 41738 states and 60429 transitions. [2023-12-02 14:02:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 14:02:28,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:28,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:28,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 14:02:28,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:28,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash -32510232, now seen corresponding path program 1 times [2023-12-02 14:02:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:28,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281074945] [2023-12-02 14:02:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:28,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 14:02:29,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:29,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281074945] [2023-12-02 14:02:29,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281074945] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:29,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:02:29,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 14:02:29,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447358877] [2023-12-02 14:02:29,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:29,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:02:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:02:29,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:02:29,263 INFO L87 Difference]: Start difference. First operand 41738 states and 60429 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:02:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:31,805 INFO L93 Difference]: Finished difference Result 134418 states and 195475 transitions. [2023-12-02 14:02:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:02:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2023-12-02 14:02:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:32,051 INFO L225 Difference]: With dead ends: 134418 [2023-12-02 14:02:32,051 INFO L226 Difference]: Without dead ends: 92686 [2023-12-02 14:02:32,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:02:32,111 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 821 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:32,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 850 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:02:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92686 states. [2023-12-02 14:02:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92686 to 81930. [2023-12-02 14:02:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81930 states, 70147 states have (on average 1.434287995210059) internal successors, (100611), 70405 states have internal predecessors, (100611), 8710 states have call successors, (8710), 3073 states have call predecessors, (8710), 3072 states have return successors, (8708), 8452 states have call predecessors, (8708), 8708 states have call successors, (8708) [2023-12-02 14:02:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81930 states to 81930 states and 118029 transitions. [2023-12-02 14:02:35,377 INFO L78 Accepts]: Start accepts. Automaton has 81930 states and 118029 transitions. Word has length 132 [2023-12-02 14:02:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:35,377 INFO L495 AbstractCegarLoop]: Abstraction has 81930 states and 118029 transitions. [2023-12-02 14:02:35,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:02:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 81930 states and 118029 transitions. [2023-12-02 14:02:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-02 14:02:35,442 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:35,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:02:35,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:02:35,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:35,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:35,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1192191925, now seen corresponding path program 1 times [2023-12-02 14:02:35,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:35,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286263785] [2023-12-02 14:02:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:35,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 14:02:35,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286263785] [2023-12-02 14:02:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286263785] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350665302] [2023-12-02 14:02:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:35,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:35,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:35,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:02:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:35,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:35,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 14:02:35,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:35,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350665302] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:35,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:35,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 14:02:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404333831] [2023-12-02 14:02:35,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:35,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:35,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:35,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:02:35,919 INFO L87 Difference]: Start difference. First operand 81930 states and 118029 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:02:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:39,422 INFO L93 Difference]: Finished difference Result 146702 states and 214032 transitions. [2023-12-02 14:02:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 156 [2023-12-02 14:02:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:39,870 INFO L225 Difference]: With dead ends: 146702 [2023-12-02 14:02:39,871 INFO L226 Difference]: Without dead ends: 104714 [2023-12-02 14:02:39,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:02:39,947 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 125 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:39,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 620 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104714 states. [2023-12-02 14:02:43,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104714 to 99082. [2023-12-02 14:02:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99082 states, 86787 states have (on average 1.463110834571998) internal successors, (126979), 87045 states have internal predecessors, (126979), 8966 states have call successors, (8966), 3329 states have call predecessors, (8966), 3328 states have return successors, (8964), 8708 states have call predecessors, (8964), 8964 states have call successors, (8964) [2023-12-02 14:02:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99082 states to 99082 states and 144909 transitions. [2023-12-02 14:02:43,804 INFO L78 Accepts]: Start accepts. Automaton has 99082 states and 144909 transitions. Word has length 156 [2023-12-02 14:02:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:43,805 INFO L495 AbstractCegarLoop]: Abstraction has 99082 states and 144909 transitions. [2023-12-02 14:02:43,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 14:02:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 99082 states and 144909 transitions. [2023-12-02 14:02:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-12-02 14:02:44,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:44,225 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 14:02:44,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:02:44,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 14:02:44,425 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:44,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2100710503, now seen corresponding path program 1 times [2023-12-02 14:02:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903199840] [2023-12-02 14:02:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 14:02:44,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:44,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903199840] [2023-12-02 14:02:44,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903199840] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:44,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171229938] [2023-12-02 14:02:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:44,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:44,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:44,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:44,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:02:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:44,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:44,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-02 14:02:45,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:45,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171229938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:45,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:45,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 14:02:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025942802] [2023-12-02 14:02:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:45,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:45,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:02:45,209 INFO L87 Difference]: Start difference. First operand 99082 states and 144909 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:02:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:02:50,564 INFO L93 Difference]: Finished difference Result 295699 states and 437270 transitions. [2023-12-02 14:02:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:02:50,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 204 [2023-12-02 14:02:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:02:51,045 INFO L225 Difference]: With dead ends: 295699 [2023-12-02 14:02:51,045 INFO L226 Difference]: Without dead ends: 196622 [2023-12-02 14:02:51,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:02:51,178 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 188 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:02:51,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:02:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196622 states. [2023-12-02 14:02:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196622 to 195850. [2023-12-02 14:02:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195850 states, 171779 states have (on average 1.4575180901041453) internal successors, (250371), 172293 states have internal predecessors, (250371), 17414 states have call successors, (17414), 6657 states have call predecessors, (17414), 6656 states have return successors, (17412), 16900 states have call predecessors, (17412), 17412 states have call successors, (17412) [2023-12-02 14:02:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195850 states to 195850 states and 285197 transitions. [2023-12-02 14:02:58,435 INFO L78 Accepts]: Start accepts. Automaton has 195850 states and 285197 transitions. Word has length 204 [2023-12-02 14:02:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:02:58,435 INFO L495 AbstractCegarLoop]: Abstraction has 195850 states and 285197 transitions. [2023-12-02 14:02:58,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:02:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 195850 states and 285197 transitions. [2023-12-02 14:02:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-12-02 14:02:58,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:02:58,710 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 14:02:58,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 14:02:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 14:02:58,912 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:02:58,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:02:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1945821376, now seen corresponding path program 1 times [2023-12-02 14:02:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:02:58,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051908672] [2023-12-02 14:02:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:58,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:02:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 14:02:59,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:02:59,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051908672] [2023-12-02 14:02:59,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051908672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:02:59,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401973401] [2023-12-02 14:02:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:02:59,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:02:59,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:02:59,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:02:59,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:02:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:02:59,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:02:59,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:02:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 14:02:59,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:02:59,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401973401] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:02:59,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:02:59,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 14:02:59,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424596111] [2023-12-02 14:02:59,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:02:59,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:02:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:02:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:02:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:02:59,882 INFO L87 Difference]: Start difference. First operand 195850 states and 285197 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:03:10,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:03:10,751 INFO L93 Difference]: Finished difference Result 584467 states and 860182 transitions. [2023-12-02 14:03:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:03:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 204 [2023-12-02 14:03:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:03:11,801 INFO L225 Difference]: With dead ends: 584467 [2023-12-02 14:03:11,801 INFO L226 Difference]: Without dead ends: 388622 [2023-12-02 14:03:12,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:03:12,415 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 188 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:03:12,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:03:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388622 states. [2023-12-02 14:03:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388622 to 387082. [2023-12-02 14:03:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387082 states, 339971 states have (on average 1.451803242041233) internal successors, (493571), 340997 states have internal predecessors, (493571), 33798 states have call successors, (33798), 13313 states have call predecessors, (33798), 13312 states have return successors, (33796), 32772 states have call predecessors, (33796), 33796 states have call successors, (33796) [2023-12-02 14:03:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387082 states to 387082 states and 561165 transitions. [2023-12-02 14:03:26,960 INFO L78 Accepts]: Start accepts. Automaton has 387082 states and 561165 transitions. Word has length 204 [2023-12-02 14:03:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:03:26,961 INFO L495 AbstractCegarLoop]: Abstraction has 387082 states and 561165 transitions. [2023-12-02 14:03:26,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:03:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 387082 states and 561165 transitions. [2023-12-02 14:03:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-12-02 14:03:27,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:03:27,553 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 14:03:27,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 14:03:27,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 14:03:27,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:03:27,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:03:27,755 INFO L85 PathProgramCache]: Analyzing trace with hash -744943335, now seen corresponding path program 1 times [2023-12-02 14:03:27,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:03:27,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887879337] [2023-12-02 14:03:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:03:27,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:03:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:03:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 14:03:28,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:03:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887879337] [2023-12-02 14:03:28,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887879337] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:03:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828721972] [2023-12-02 14:03:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:03:28,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:03:28,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:03:28,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:03:28,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0992c0be-f786-4fa0-968d-29ff4307b24a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:03:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:03:28,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:03:28,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:03:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 14:03:28,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:03:28,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828721972] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:03:28,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:03:28,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 14:03:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805522488] [2023-12-02 14:03:28,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:03:28,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:03:28,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:03:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:03:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:03:28,411 INFO L87 Difference]: Start difference. First operand 387082 states and 561165 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 14:03:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:03:50,390 INFO L93 Difference]: Finished difference Result 1155091 states and 1691670 transitions. [2023-12-02 14:03:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:03:50,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 204 [2023-12-02 14:03:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:03:52,702 INFO L225 Difference]: With dead ends: 1155091 [2023-12-02 14:03:52,703 INFO L226 Difference]: Without dead ends: 768014 [2023-12-02 14:03:53,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:03:53,714 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 188 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:03:53,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 467 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:03:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768014 states.