./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/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_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/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_6409b2c0-cce8-4296-a58e-51aa8426eb2a/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 7337e3db834e57315ee73ddaf50a0d2f544bd41ddf080ac302a0a29c062196b8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:14:03,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:14:03,414 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:14:03,419 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:14:03,420 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:14:03,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:14:03,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:14:03,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:14:03,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:14:03,448 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:14:03,449 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:14:03,449 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:14:03,450 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:14:03,450 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:14:03,451 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:14:03,451 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:14:03,452 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:14:03,452 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:14:03,453 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:14:03,453 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:14:03,454 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:14:03,456 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:14:03,457 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:14:03,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:14:03,457 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:14:03,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:14:03,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:14:03,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:14:03,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:14:03,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:14:03,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:14:03,460 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:14:03,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:14:03,461 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:14:03,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:14:03,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:14:03,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:14:03,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:14:03,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:14:03,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:14:03,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:14:03,462 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:14:03,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:14:03,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:14:03,463 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:14:03,463 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:14:03,463 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:14:03,463 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_6409b2c0-cce8-4296-a58e-51aa8426eb2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7337e3db834e57315ee73ddaf50a0d2f544bd41ddf080ac302a0a29c062196b8 [2023-12-02 18:14:03,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:14:03,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:14:03,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:14:03,709 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:14:03,709 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:14:03,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c [2023-12-02 18:14:06,552 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:14:07,234 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:14:07,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c [2023-12-02 18:14:07,293 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/data/9d6dda784/f2f434c388cb452e893c9953902879a4/FLAG50559aafe [2023-12-02 18:14:07,308 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/data/9d6dda784/f2f434c388cb452e893c9953902879a4 [2023-12-02 18:14:07,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:14:07,312 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:14:07,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:14:07,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:14:07,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:14:07,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:14:07" (1/1) ... [2023-12-02 18:14:07,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d124b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:07, skipping insertion in model container [2023-12-02 18:14:07,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:14:07" (1/1) ... [2023-12-02 18:14:07,575 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:14:09,341 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_6409b2c0-cce8-4296-a58e-51aa8426eb2a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c[382357,382370] [2023-12-02 18:14:09,366 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_6409b2c0-cce8-4296-a58e-51aa8426eb2a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c[383339,383352] [2023-12-02 18:14:09,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:14:09,725 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:14:10,704 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_6409b2c0-cce8-4296-a58e-51aa8426eb2a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c[382357,382370] [2023-12-02 18:14:10,707 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_6409b2c0-cce8-4296-a58e-51aa8426eb2a/sv-benchmarks/c/combinations/Problem05_label46+token_ring.12.cil-2.c[383339,383352] [2023-12-02 18:14:10,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:14:10,829 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:14:10,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10 WrapperNode [2023-12-02 18:14:10,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:14:10,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:14:10,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:14:10,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:14:10,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:10,901 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,346 INFO L138 Inliner]: procedures = 68, calls = 77, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 13228 [2023-12-02 18:14:11,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:14:11,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:14:11,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:14:11,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:14:11,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,476 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,476 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,703 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,726 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,776 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:14:11,777 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:14:11,777 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:14:11,778 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:14:11,778 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (1/1) ... [2023-12-02 18:14:11,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:14:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:11,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:14:11,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:14:11,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:14:11,844 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 18:14:11,845 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 18:14:11,845 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 18:14:11,845 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 18:14:11,845 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 18:14:11,845 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 18:14:11,846 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 18:14:11,846 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 18:14:11,846 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 18:14:11,846 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 18:14:11,846 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 18:14:11,846 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 18:14:11,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:14:11,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:14:11,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:14:11,993 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:14:11,995 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:14:20,341 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:14:22,249 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:14:22,249 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-02 18:14:22,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:14:22 BoogieIcfgContainer [2023-12-02 18:14:22,251 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:14:22,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:14:22,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:14:22,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:14:22,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:14:07" (1/3) ... [2023-12-02 18:14:22,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f795727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:14:22, skipping insertion in model container [2023-12-02 18:14:22,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:14:10" (2/3) ... [2023-12-02 18:14:22,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f795727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:14:22, skipping insertion in model container [2023-12-02 18:14:22,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:14:22" (3/3) ... [2023-12-02 18:14:22,260 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.12.cil-2.c [2023-12-02 18:14:22,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:14:22,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 18:14:22,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:14:22,359 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;@274cf9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:14:22,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 18:14:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 1844 states, 1809 states have (on average 1.94914317302377) internal successors, (3526), 1812 states have internal predecessors, (3526), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-02 18:14:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 18:14:22,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:22,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:14:22,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:22,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1538345893, now seen corresponding path program 1 times [2023-12-02 18:14:22,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:22,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356638288] [2023-12-02 18:14:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:22,861 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 18:14:22,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356638288] [2023-12-02 18:14:22,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356638288] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:22,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:14:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:14:22,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522528378] [2023-12-02 18:14:22,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:22,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:14:22,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:14:22,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:14:22,903 INFO L87 Difference]: Start difference. First operand has 1844 states, 1809 states have (on average 1.94914317302377) internal successors, (3526), 1812 states have internal predecessors, (3526), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:14:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:23,883 INFO L93 Difference]: Finished difference Result 3872 states and 7466 transitions. [2023-12-02 18:14:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:14:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2023-12-02 18:14:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:23,912 INFO L225 Difference]: With dead ends: 3872 [2023-12-02 18:14:23,912 INFO L226 Difference]: Without dead ends: 2027 [2023-12-02 18:14:23,921 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 18:14:23,925 INFO L413 NwaCegarLoop]: 3537 mSDtfsCounter, 3805 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 6976 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:23,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3805 Valid, 6976 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:14:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2023-12-02 18:14:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2026. [2023-12-02 18:14:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 1964 states have (on average 1.9073319755600815) internal successors, (3746), 1967 states have internal predecessors, (3746), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-02 18:14:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3842 transitions. [2023-12-02 18:14:24,068 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3842 transitions. Word has length 67 [2023-12-02 18:14:24,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:24,068 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 3842 transitions. [2023-12-02 18:14:24,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:14:24,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3842 transitions. [2023-12-02 18:14:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:24,079 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:24,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:24,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:14:24,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:24,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:24,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1049912646, now seen corresponding path program 1 times [2023-12-02 18:14:24,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:24,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992026598] [2023-12-02 18:14:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:24,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:14:24,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992026598] [2023-12-02 18:14:24,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992026598] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:24,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677560729] [2023-12-02 18:14:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:24,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:24,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:14:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:24,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:24,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 18:14:24,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:24,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677560729] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:24,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:24,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:14:24,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181923375] [2023-12-02 18:14:24,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:24,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:24,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:24,783 INFO L87 Difference]: Start difference. First operand 2026 states and 3842 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:25,314 INFO L93 Difference]: Finished difference Result 2779 states and 4993 transitions. [2023-12-02 18:14:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 18:14:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:25,331 INFO L225 Difference]: With dead ends: 2779 [2023-12-02 18:14:25,331 INFO L226 Difference]: Without dead ends: 2399 [2023-12-02 18:14:25,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:25,334 INFO L413 NwaCegarLoop]: 3355 mSDtfsCounter, 3520 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3520 SdHoareTripleChecker+Valid, 3593 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:25,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3520 Valid, 3593 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:14:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2023-12-02 18:14:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2395. [2023-12-02 18:14:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2279 states have (on average 1.8468626590609916) internal successors, (4209), 2283 states have internal predecessors, (4209), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2023-12-02 18:14:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4389 transitions. [2023-12-02 18:14:25,413 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4389 transitions. Word has length 137 [2023-12-02 18:14:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:25,414 INFO L495 AbstractCegarLoop]: Abstraction has 2395 states and 4389 transitions. [2023-12-02 18:14:25,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4389 transitions. [2023-12-02 18:14:25,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:25,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:25,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:25,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:14:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:25,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:25,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1021026406, now seen corresponding path program 1 times [2023-12-02 18:14:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:25,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537381063] [2023-12-02 18:14:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:25,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:14:25,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:25,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537381063] [2023-12-02 18:14:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537381063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983733412] [2023-12-02 18:14:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:25,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:25,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:14:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:26,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:26,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 18:14:26,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:26,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983733412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:26,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:26,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:14:26,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867177764] [2023-12-02 18:14:26,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:26,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:26,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:26,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:26,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:26,196 INFO L87 Difference]: Start difference. First operand 2395 states and 4389 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:26,762 INFO L93 Difference]: Finished difference Result 3880 states and 6652 transitions. [2023-12-02 18:14:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 18:14:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:26,783 INFO L225 Difference]: With dead ends: 3880 [2023-12-02 18:14:26,783 INFO L226 Difference]: Without dead ends: 3131 [2023-12-02 18:14:26,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:26,789 INFO L413 NwaCegarLoop]: 3353 mSDtfsCounter, 3538 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:26,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3591 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:14:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2023-12-02 18:14:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3125. [2023-12-02 18:14:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 2903 states have (on average 1.764726145366862) internal successors, (5123), 2909 states have internal predecessors, (5123), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2023-12-02 18:14:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5467 transitions. [2023-12-02 18:14:26,919 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5467 transitions. Word has length 137 [2023-12-02 18:14:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:26,919 INFO L495 AbstractCegarLoop]: Abstraction has 3125 states and 5467 transitions. [2023-12-02 18:14:26,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5467 transitions. [2023-12-02 18:14:26,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:26,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:26,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:26,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:14:27,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:27,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:27,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 784968826, now seen corresponding path program 1 times [2023-12-02 18:14:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:27,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904997681] [2023-12-02 18:14:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:27,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:14:27,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904997681] [2023-12-02 18:14:27,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904997681] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012957483] [2023-12-02 18:14:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:27,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:27,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:27,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:14:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:27,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:27,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 18:14:27,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:27,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012957483] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:27,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:14:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112997128] [2023-12-02 18:14:27,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:27,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:27,615 INFO L87 Difference]: Start difference. First operand 3125 states and 5467 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:28,210 INFO L93 Difference]: Finished difference Result 6058 states and 9920 transitions. [2023-12-02 18:14:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 18:14:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:28,239 INFO L225 Difference]: With dead ends: 6058 [2023-12-02 18:14:28,239 INFO L226 Difference]: Without dead ends: 4579 [2023-12-02 18:14:28,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:28,247 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 3532 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3532 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:28,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3532 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:14:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2023-12-02 18:14:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4569. [2023-12-02 18:14:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4139 states have (on average 1.673592655230732) internal successors, (6927), 4149 states have internal predecessors, (6927), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2023-12-02 18:14:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 7591 transitions. [2023-12-02 18:14:28,426 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 7591 transitions. Word has length 137 [2023-12-02 18:14:28,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:28,427 INFO L495 AbstractCegarLoop]: Abstraction has 4569 states and 7591 transitions. [2023-12-02 18:14:28,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:28,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 7591 transitions. [2023-12-02 18:14:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:28,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:28,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:28,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:14:28,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:28,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:28,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:28,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1612849498, now seen corresponding path program 1 times [2023-12-02 18:14:28,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:28,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748942220] [2023-12-02 18:14:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:28,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:14:28,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:28,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748942220] [2023-12-02 18:14:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748942220] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:28,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463441769] [2023-12-02 18:14:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:28,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:28,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:28,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:28,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:14:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:29,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:29,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 18:14:29,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:29,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463441769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:29,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:29,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:14:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407558872] [2023-12-02 18:14:29,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:29,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:29,112 INFO L87 Difference]: Start difference. First operand 4569 states and 7591 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:29,723 INFO L93 Difference]: Finished difference Result 10366 states and 16356 transitions. [2023-12-02 18:14:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:29,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 18:14:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:29,774 INFO L225 Difference]: With dead ends: 10366 [2023-12-02 18:14:29,775 INFO L226 Difference]: Without dead ends: 7443 [2023-12-02 18:14:29,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:29,792 INFO L413 NwaCegarLoop]: 3349 mSDtfsCounter, 3541 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:29,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3587 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:14:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7443 states. [2023-12-02 18:14:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7443 to 7425. [2023-12-02 18:14:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7425 states, 6587 states have (on average 1.5920752998330043) internal successors, (10487), 6605 states have internal predecessors, (10487), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2023-12-02 18:14:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 11775 transitions. [2023-12-02 18:14:30,112 INFO L78 Accepts]: Start accepts. Automaton has 7425 states and 11775 transitions. Word has length 137 [2023-12-02 18:14:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:30,112 INFO L495 AbstractCegarLoop]: Abstraction has 7425 states and 11775 transitions. [2023-12-02 18:14:30,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 7425 states and 11775 transitions. [2023-12-02 18:14:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:30,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:30,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:30,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:14:30,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:30,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:30,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash 961489018, now seen corresponding path program 1 times [2023-12-02 18:14:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:30,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781101971] [2023-12-02 18:14:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:14:30,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:30,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781101971] [2023-12-02 18:14:30,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781101971] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:30,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597306151] [2023-12-02 18:14:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:30,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:30,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:30,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:30,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:14:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:30,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:30,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:14:30,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:30,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597306151] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:30,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:30,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:14:30,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813511807] [2023-12-02 18:14:30,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:30,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:30,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:30,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:30,824 INFO L87 Difference]: Start difference. First operand 7425 states and 11775 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:31,569 INFO L93 Difference]: Finished difference Result 18886 states and 29028 transitions. [2023-12-02 18:14:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 18:14:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:31,638 INFO L225 Difference]: With dead ends: 18886 [2023-12-02 18:14:31,638 INFO L226 Difference]: Without dead ends: 13107 [2023-12-02 18:14:31,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:31,663 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 3511 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3511 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:31,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3511 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:14:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13107 states. [2023-12-02 18:14:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13107 to 13073. [2023-12-02 18:14:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13073 states, 11435 states have (on average 1.5313511149978136) internal successors, (17511), 11469 states have internal predecessors, (17511), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2023-12-02 18:14:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13073 states to 13073 states and 20015 transitions. [2023-12-02 18:14:32,172 INFO L78 Accepts]: Start accepts. Automaton has 13073 states and 20015 transitions. Word has length 137 [2023-12-02 18:14:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:32,172 INFO L495 AbstractCegarLoop]: Abstraction has 13073 states and 20015 transitions. [2023-12-02 18:14:32,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13073 states and 20015 transitions. [2023-12-02 18:14:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:32,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:32,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:32,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:14:32,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:32,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:32,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:32,395 INFO L85 PathProgramCache]: Analyzing trace with hash -652515430, now seen corresponding path program 1 times [2023-12-02 18:14:32,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:32,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736930180] [2023-12-02 18:14:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:32,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:14:32,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736930180] [2023-12-02 18:14:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736930180] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797340489] [2023-12-02 18:14:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:32,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:32,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:32,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:14:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:32,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:32,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:14:32,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797340489] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:14:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213527698] [2023-12-02 18:14:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:32,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:32,823 INFO L87 Difference]: Start difference. First operand 13073 states and 20015 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:33,797 INFO L93 Difference]: Finished difference Result 35734 states and 53972 transitions. [2023-12-02 18:14:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:33,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 18:14:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:33,876 INFO L225 Difference]: With dead ends: 35734 [2023-12-02 18:14:33,877 INFO L226 Difference]: Without dead ends: 24307 [2023-12-02 18:14:33,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:33,914 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 3514 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3514 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:33,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3514 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:14:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24307 states. [2023-12-02 18:14:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24307 to 24241. [2023-12-02 18:14:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24241 states, 21035 states have (on average 1.4911813643926788) internal successors, (31367), 21101 states have internal predecessors, (31367), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2023-12-02 18:14:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24241 states to 24241 states and 36239 transitions. [2023-12-02 18:14:34,757 INFO L78 Accepts]: Start accepts. Automaton has 24241 states and 36239 transitions. Word has length 137 [2023-12-02 18:14:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:34,758 INFO L495 AbstractCegarLoop]: Abstraction has 24241 states and 36239 transitions. [2023-12-02 18:14:34,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 24241 states and 36239 transitions. [2023-12-02 18:14:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:34,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:34,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:34,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:14:35,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:35,003 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:35,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1300147078, now seen corresponding path program 1 times [2023-12-02 18:14:35,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:35,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349151323] [2023-12-02 18:14:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:35,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:14:35,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:35,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349151323] [2023-12-02 18:14:35,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349151323] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:35,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962073150] [2023-12-02 18:14:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:35,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:35,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:35,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:35,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:14:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:35,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:35,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:14:35,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962073150] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:35,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:35,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 18:14:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241246926] [2023-12-02 18:14:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:35,470 INFO L87 Difference]: Start difference. First operand 24241 states and 36239 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:36,632 INFO L93 Difference]: Finished difference Result 69046 states and 103060 transitions. [2023-12-02 18:14:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:36,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 137 [2023-12-02 18:14:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:36,744 INFO L225 Difference]: With dead ends: 69046 [2023-12-02 18:14:36,744 INFO L226 Difference]: Without dead ends: 46451 [2023-12-02 18:14:36,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:36,799 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 3526 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:36,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3526 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:14:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46451 states. [2023-12-02 18:14:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46451 to 46321. [2023-12-02 18:14:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46321 states, 40043 states have (on average 1.4657992657892764) internal successors, (58695), 40173 states have internal predecessors, (58695), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2023-12-02 18:14:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46321 states to 46321 states and 68175 transitions. [2023-12-02 18:14:38,353 INFO L78 Accepts]: Start accepts. Automaton has 46321 states and 68175 transitions. Word has length 137 [2023-12-02 18:14:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:38,354 INFO L495 AbstractCegarLoop]: Abstraction has 46321 states and 68175 transitions. [2023-12-02 18:14:38,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 18:14:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 46321 states and 68175 transitions. [2023-12-02 18:14:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 18:14:38,407 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:38,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:38,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 18:14:38,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:38,608 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:38,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash 420147546, now seen corresponding path program 1 times [2023-12-02 18:14:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:38,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698939418] [2023-12-02 18:14:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 18:14:39,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:39,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698939418] [2023-12-02 18:14:39,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698939418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:39,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:14:39,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:14:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997572279] [2023-12-02 18:14:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:39,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:14:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:14:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:14:39,161 INFO L87 Difference]: Start difference. First operand 46321 states and 68175 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:14:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:42,089 INFO L93 Difference]: Finished difference Result 145781 states and 213585 transitions. [2023-12-02 18:14:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:14:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2023-12-02 18:14:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:42,441 INFO L225 Difference]: With dead ends: 145781 [2023-12-02 18:14:42,441 INFO L226 Difference]: Without dead ends: 101107 [2023-12-02 18:14:42,514 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 18:14:42,515 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 4131 mSDsluCounter, 6594 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4152 SdHoareTripleChecker+Valid, 9918 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:42,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4152 Valid, 9918 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:14:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101107 states. [2023-12-02 18:14:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101107 to 89457. [2023-12-02 18:14:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89457 states, 77163 states have (on average 1.4490753340331506) internal successors, (111815), 77421 states have internal predecessors, (111815), 9220 states have call successors, (9220), 3072 states have call predecessors, (9220), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2023-12-02 18:14:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89457 states to 89457 states and 130255 transitions. [2023-12-02 18:14:45,965 INFO L78 Accepts]: Start accepts. Automaton has 89457 states and 130255 transitions. Word has length 137 [2023-12-02 18:14:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:45,966 INFO L495 AbstractCegarLoop]: Abstraction has 89457 states and 130255 transitions. [2023-12-02 18:14:45,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 18:14:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 89457 states and 130255 transitions. [2023-12-02 18:14:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 18:14:46,055 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:46,056 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, 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 18:14:46,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 18:14:46,056 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:46,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash 662117402, now seen corresponding path program 1 times [2023-12-02 18:14:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:46,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092523990] [2023-12-02 18:14:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:46,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 18:14:46,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:46,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092523990] [2023-12-02 18:14:46,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092523990] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:46,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178382513] [2023-12-02 18:14:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:46,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:46,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:46,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:14:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:46,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:46,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 18:14:46,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178382513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:46,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:46,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:14:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494166844] [2023-12-02 18:14:46,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:46,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:46,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:14:46,813 INFO L87 Difference]: Start difference. First operand 89457 states and 130255 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:14:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:14:49,938 INFO L93 Difference]: Finished difference Result 158963 states and 233808 transitions. [2023-12-02 18:14:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:14:49,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 160 [2023-12-02 18:14:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:14:50,293 INFO L225 Difference]: With dead ends: 158963 [2023-12-02 18:14:50,293 INFO L226 Difference]: Without dead ends: 114417 [2023-12-02 18:14:50,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:14:50,361 INFO L413 NwaCegarLoop]: 3445 mSDtfsCounter, 137 mSDsluCounter, 3314 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 6759 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:14:50,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 6759 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:14:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114417 states. [2023-12-02 18:14:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114417 to 108529. [2023-12-02 18:14:54,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108529 states, 95723 states have (on average 1.4783385393270165) internal successors, (141511), 95981 states have internal predecessors, (141511), 9476 states have call successors, (9476), 3328 states have call predecessors, (9476), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2023-12-02 18:14:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108529 states to 108529 states and 160463 transitions. [2023-12-02 18:14:54,456 INFO L78 Accepts]: Start accepts. Automaton has 108529 states and 160463 transitions. Word has length 160 [2023-12-02 18:14:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:54,457 INFO L495 AbstractCegarLoop]: Abstraction has 108529 states and 160463 transitions. [2023-12-02 18:14:54,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:14:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 108529 states and 160463 transitions. [2023-12-02 18:14:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-12-02 18:14:54,605 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:54,605 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:14:54,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:14:54,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 18:14:54,806 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:54,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash -81136680, now seen corresponding path program 1 times [2023-12-02 18:14:54,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:54,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028934956] [2023-12-02 18:14:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:54,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-02 18:14:55,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028934956] [2023-12-02 18:14:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028934956] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141252100] [2023-12-02 18:14:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:55,098 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:55,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:14:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:55,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:14:55,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 18:14:55,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:14:55,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141252100] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:14:55,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:14:55,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 18:14:55,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554858468] [2023-12-02 18:14:55,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:14:55,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:14:55,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:14:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:14:55,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:14:55,489 INFO L87 Difference]: Start difference. First operand 108529 states and 160463 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:15:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:15:01,453 INFO L93 Difference]: Finished difference Result 320758 states and 477908 transitions. [2023-12-02 18:15:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:15:01,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 211 [2023-12-02 18:15:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:15:02,012 INFO L225 Difference]: With dead ends: 320758 [2023-12-02 18:15:02,012 INFO L226 Difference]: Without dead ends: 213875 [2023-12-02 18:15:02,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 213 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 18:15:02,162 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 3464 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:15:02,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:15:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213875 states. [2023-12-02 18:15:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213875 to 213105. [2023-12-02 18:15:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213105 states, 188011 states have (on average 1.4688874587125222) internal successors, (276167), 188525 states have internal predecessors, (276167), 18436 states have call successors, (18436), 6656 states have call predecessors, (18436), 6656 states have return successors, (18436), 17924 states have call predecessors, (18436), 18436 states have call successors, (18436) [2023-12-02 18:15:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213105 states to 213105 states and 313039 transitions. [2023-12-02 18:15:09,616 INFO L78 Accepts]: Start accepts. Automaton has 213105 states and 313039 transitions. Word has length 211 [2023-12-02 18:15:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:15:09,616 INFO L495 AbstractCegarLoop]: Abstraction has 213105 states and 313039 transitions. [2023-12-02 18:15:09,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:15:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 213105 states and 313039 transitions. [2023-12-02 18:15:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-12-02 18:15:09,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:15:09,900 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:15:09,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:15:10,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 18:15:10,101 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:15:10,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:15:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1796313034, now seen corresponding path program 1 times [2023-12-02 18:15:10,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:15:10,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337878485] [2023-12-02 18:15:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:15:10,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:15:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:15:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-02 18:15:10,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:15:10,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337878485] [2023-12-02 18:15:10,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337878485] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:15:10,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869539273] [2023-12-02 18:15:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:15:10,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:15:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:15:10,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:15:10,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:15:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:15:11,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:15:11,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:15:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 18:15:11,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:15:11,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869539273] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:15:11,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:15:11,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 18:15:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865159555] [2023-12-02 18:15:11,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:15:11,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:15:11,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:15:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:15:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:15:11,274 INFO L87 Difference]: Start difference. First operand 213105 states and 313039 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:15:22,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:15:22,130 INFO L93 Difference]: Finished difference Result 632950 states and 938196 transitions. [2023-12-02 18:15:22,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:15:22,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 211 [2023-12-02 18:15:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:15:23,537 INFO L225 Difference]: With dead ends: 632950 [2023-12-02 18:15:23,537 INFO L226 Difference]: Without dead ends: 421491 [2023-12-02 18:15:23,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 213 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 18:15:23,839 INFO L413 NwaCegarLoop]: 3302 mSDtfsCounter, 3464 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:15:23,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3540 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:15:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421491 states. [2023-12-02 18:15:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421491 to 419953. [2023-12-02 18:15:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419953 states, 370795 states have (on average 1.4614409579417198) internal successors, (541895), 371821 states have internal predecessors, (541895), 35844 states have call successors, (35844), 13312 states have call predecessors, (35844), 13312 states have return successors, (35844), 34820 states have call predecessors, (35844), 35844 states have call successors, (35844) [2023-12-02 18:15:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419953 states to 419953 states and 613583 transitions. [2023-12-02 18:15:38,788 INFO L78 Accepts]: Start accepts. Automaton has 419953 states and 613583 transitions. Word has length 211 [2023-12-02 18:15:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:15:38,788 INFO L495 AbstractCegarLoop]: Abstraction has 419953 states and 613583 transitions. [2023-12-02 18:15:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:15:38,789 INFO L276 IsEmpty]: Start isEmpty. Operand 419953 states and 613583 transitions. [2023-12-02 18:15:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-12-02 18:15:39,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:15:39,399 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:15:39,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:15:39,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 18:15:39,600 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:15:39,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:15:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash -446400054, now seen corresponding path program 1 times [2023-12-02 18:15:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:15:39,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250119278] [2023-12-02 18:15:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:15:39,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:15:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:15:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-02 18:15:39,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:15:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250119278] [2023-12-02 18:15:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250119278] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:15:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802796405] [2023-12-02 18:15:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:15:39,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:15:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:15:39,972 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:15:39,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6409b2c0-cce8-4296-a58e-51aa8426eb2a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:15:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:15:40,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:15:40,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:15:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 18:15:40,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:15:40,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802796405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:15:40,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:15:40,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 18:15:40,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538522828] [2023-12-02 18:15:40,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:15:40,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:15:40,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:15:40,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:15:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:15:40,569 INFO L87 Difference]: Start difference. First operand 419953 states and 613583 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:16:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:16:02,758 INFO L93 Difference]: Finished difference Result 1250422 states and 1844436 transitions. [2023-12-02 18:16:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:16:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 211 [2023-12-02 18:16:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:16:05,316 INFO L225 Difference]: With dead ends: 1250422 [2023-12-02 18:16:05,316 INFO L226 Difference]: Without dead ends: 832115 [2023-12-02 18:16:06,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 213 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 18:16:06,031 INFO L413 NwaCegarLoop]: 3315 mSDtfsCounter, 3464 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:16:06,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3553 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:16:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832115 states. [2023-12-02 18:16:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832115 to 829041. [2023-12-02 18:16:31,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829041 states, 732779 states have (on average 1.4549857460434865) internal successors, (1066183), 734829 states have internal predecessors, (1066183), 69636 states have call successors, (69636), 26624 states have call predecessors, (69636), 26624 states have return successors, (69636), 67588 states have call predecessors, (69636), 69636 states have call successors, (69636) [2023-12-02 18:16:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829041 states to 829041 states and 1205455 transitions. [2023-12-02 18:16:35,433 INFO L78 Accepts]: Start accepts. Automaton has 829041 states and 1205455 transitions. Word has length 211 [2023-12-02 18:16:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:16:35,433 INFO L495 AbstractCegarLoop]: Abstraction has 829041 states and 1205455 transitions. [2023-12-02 18:16:35,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 18:16:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 829041 states and 1205455 transitions.