./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:33:33,168 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:33:33,301 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:33:33,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:33:33,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:33:33,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:33:33,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:33:33,359 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:33:33,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:33:33,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:33:33,362 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:33:33,363 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:33:33,363 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:33:33,364 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:33:33,367 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:33:33,368 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:33:33,368 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:33:33,369 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:33:33,369 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:33:33,370 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:33:33,370 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:33:33,371 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:33:33,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:33:33,372 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:33:33,373 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:33:33,373 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:33:33,374 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:33:33,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:33:33,375 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:33:33,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:33:33,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:33:33,377 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:33:33,377 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:33:33,378 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:33:33,378 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:33:33,378 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:33:33,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:33:33,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:33:33,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:33:33,380 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:33:33,380 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:33:33,381 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:33:33,382 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:33:33,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:33:33,383 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:33:33,383 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:33:33,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:33:33,384 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_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 [2024-11-09 05:33:33,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:33:33,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:33:33,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:33:33,858 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:33:33,860 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:33:33,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c Unable to find full path for "g++" [2024-11-09 05:33:36,284 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:33:36,536 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:33:36,537 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2024-11-09 05:33:36,555 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/data/b4c132b67/f27e4cde1a224e639fa2b61d2c8cc571/FLAG2021cc34e [2024-11-09 05:33:36,586 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/data/b4c132b67/f27e4cde1a224e639fa2b61d2c8cc571 [2024-11-09 05:33:36,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:33:36,595 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:33:36,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:33:36,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:33:36,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:33:36,606 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:33:36" (1/1) ... [2024-11-09 05:33:36,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56fd6368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:36, skipping insertion in model container [2024-11-09 05:33:36,612 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:33:36" (1/1) ... [2024-11-09 05:33:36,681 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:33:36,898 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/sv-benchmarks/c/systemc/token_ring.05.cil-2.c[671,684] [2024-11-09 05:33:37,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:33:37,044 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:33:37,060 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/sv-benchmarks/c/systemc/token_ring.05.cil-2.c[671,684] [2024-11-09 05:33:37,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:33:37,147 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:33:37,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37 WrapperNode [2024-11-09 05:33:37,148 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:33:37,149 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:33:37,149 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:33:37,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:33:37,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,210 INFO L138 Inliner]: procedures = 38, calls = 47, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 457 [2024-11-09 05:33:37,211 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:33:37,212 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:33:37,212 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:33:37,212 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:33:37,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,252 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,302 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,314 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:33:37,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:33:37,315 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:33:37,315 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:33:37,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (1/1) ... [2024-11-09 05:33:37,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:33:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:37,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:33:37,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:33:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:33:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-09 05:33:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-09 05:33:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 05:33:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 05:33:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 05:33:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 05:33:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 05:33:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 05:33:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 05:33:37,452 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 05:33:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 05:33:37,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 05:33:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:33:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 05:33:37,453 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 05:33:37,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:33:37,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:33:37,577 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:33:37,580 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:33:38,434 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-11-09 05:33:38,434 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:33:38,838 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:33:38,838 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-09 05:33:38,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:33:38 BoogieIcfgContainer [2024-11-09 05:33:38,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:33:38,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:33:38,844 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:33:38,848 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:33:38,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:33:36" (1/3) ... [2024-11-09 05:33:38,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c26d617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:33:38, skipping insertion in model container [2024-11-09 05:33:38,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:33:37" (2/3) ... [2024-11-09 05:33:38,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c26d617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:33:38, skipping insertion in model container [2024-11-09 05:33:38,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:33:38" (3/3) ... [2024-11-09 05:33:38,855 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-2.c [2024-11-09 05:33:38,879 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:33:38,879 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:33:38,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:33:38,999 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c73459a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:33:39,000 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:33:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 97 states have internal predecessors, (140), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 05:33:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:33:39,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:39,022 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:39,023 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:39,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -302432579, now seen corresponding path program 1 times [2024-11-09 05:33:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:39,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489376575] [2024-11-09 05:33:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:33:39,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:39,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489376575] [2024-11-09 05:33:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489376575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:39,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:33:39,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:33:39,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617949927] [2024-11-09 05:33:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:39,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:33:39,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:33:39,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:33:39,827 INFO L87 Difference]: Start difference. First operand has 123 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 97 states have internal predecessors, (140), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:33:40,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:40,334 INFO L93 Difference]: Finished difference Result 345 states and 528 transitions. [2024-11-09 05:33:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:33:40,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2024-11-09 05:33:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:40,352 INFO L225 Difference]: With dead ends: 345 [2024-11-09 05:33:40,353 INFO L226 Difference]: Without dead ends: 223 [2024-11-09 05:33:40,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:33:40,369 INFO L432 NwaCegarLoop]: 263 mSDtfsCounter, 297 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:40,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 454 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:33:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-09 05:33:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2024-11-09 05:33:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 173 states have (on average 1.4219653179190752) internal successors, (246), 176 states have internal predecessors, (246), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-09 05:33:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 316 transitions. [2024-11-09 05:33:40,477 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 316 transitions. Word has length 46 [2024-11-09 05:33:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:40,481 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 316 transitions. [2024-11-09 05:33:40,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:33:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 316 transitions. [2024-11-09 05:33:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 05:33:40,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:40,491 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:40,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:33:40,492 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:40,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1460779056, now seen corresponding path program 1 times [2024-11-09 05:33:40,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:40,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170713203] [2024-11-09 05:33:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:40,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:33:40,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:40,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170713203] [2024-11-09 05:33:40,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170713203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:40,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962286283] [2024-11-09 05:33:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:40,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:40,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:40,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:40,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:33:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:41,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:33:41,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:33:41,287 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:41,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962286283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:41,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:41,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:33:41,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819541730] [2024-11-09 05:33:41,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:41,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:41,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:41,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:41,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:41,299 INFO L87 Difference]: Start difference. First operand 222 states and 316 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:33:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:41,515 INFO L93 Difference]: Finished difference Result 649 states and 937 transitions. [2024-11-09 05:33:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:41,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2024-11-09 05:33:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:41,526 INFO L225 Difference]: With dead ends: 649 [2024-11-09 05:33:41,529 INFO L226 Difference]: Without dead ends: 432 [2024-11-09 05:33:41,531 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:41,533 INFO L432 NwaCegarLoop]: 188 mSDtfsCounter, 149 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:41,534 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 321 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:33:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-11-09 05:33:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 426. [2024-11-09 05:33:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 337 states have (on average 1.4154302670623145) internal successors, (477), 341 states have internal predecessors, (477), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2024-11-09 05:33:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 603 transitions. [2024-11-09 05:33:41,636 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 603 transitions. Word has length 88 [2024-11-09 05:33:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:41,637 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 603 transitions. [2024-11-09 05:33:41,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:33:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 603 transitions. [2024-11-09 05:33:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 05:33:41,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:41,649 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:41,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:33:41,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 05:33:41,851 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:41,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash -789453074, now seen corresponding path program 1 times [2024-11-09 05:33:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:41,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974483549] [2024-11-09 05:33:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:33:42,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:42,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974483549] [2024-11-09 05:33:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974483549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489825660] [2024-11-09 05:33:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:42,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:42,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:42,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:42,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:33:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:42,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:33:42,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:33:42,424 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489825660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:42,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:42,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:33:42,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481711165] [2024-11-09 05:33:42,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:42,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:42,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:42,428 INFO L87 Difference]: Start difference. First operand 426 states and 603 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:33:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:42,610 INFO L93 Difference]: Finished difference Result 1255 states and 1802 transitions. [2024-11-09 05:33:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:42,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2024-11-09 05:33:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:42,622 INFO L225 Difference]: With dead ends: 1255 [2024-11-09 05:33:42,622 INFO L226 Difference]: Without dead ends: 834 [2024-11-09 05:33:42,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:42,627 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 146 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:42,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 275 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2024-11-09 05:33:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 826. [2024-11-09 05:33:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 659 states have (on average 1.4066767830045523) internal successors, (927), 665 states have internal predecessors, (927), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2024-11-09 05:33:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1161 transitions. [2024-11-09 05:33:42,739 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1161 transitions. Word has length 88 [2024-11-09 05:33:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:42,742 INFO L471 AbstractCegarLoop]: Abstraction has 826 states and 1161 transitions. [2024-11-09 05:33:42,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:33:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1161 transitions. [2024-11-09 05:33:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 05:33:42,748 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:42,748 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:42,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:33:42,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-09 05:33:42,950 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:42,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1228381968, now seen corresponding path program 1 times [2024-11-09 05:33:42,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:42,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139391275] [2024-11-09 05:33:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:42,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:33:43,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139391275] [2024-11-09 05:33:43,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139391275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:43,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37131695] [2024-11-09 05:33:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:43,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:43,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:43,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:43,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:33:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:43,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:33:43,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:33:43,445 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:43,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37131695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:43,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:43,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:33:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916670928] [2024-11-09 05:33:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:43,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:43,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:43,448 INFO L87 Difference]: Start difference. First operand 826 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:33:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:43,657 INFO L93 Difference]: Finished difference Result 2443 states and 3482 transitions. [2024-11-09 05:33:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2024-11-09 05:33:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:43,670 INFO L225 Difference]: With dead ends: 2443 [2024-11-09 05:33:43,671 INFO L226 Difference]: Without dead ends: 1622 [2024-11-09 05:33:43,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:43,676 INFO L432 NwaCegarLoop]: 142 mSDtfsCounter, 140 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:43,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 275 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2024-11-09 05:33:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1610. [2024-11-09 05:33:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1291 states have (on average 1.396591789310612) internal successors, (1803), 1301 states have internal predecessors, (1803), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2024-11-09 05:33:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2245 transitions. [2024-11-09 05:33:43,819 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2245 transitions. Word has length 88 [2024-11-09 05:33:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:43,820 INFO L471 AbstractCegarLoop]: Abstraction has 1610 states and 2245 transitions. [2024-11-09 05:33:43,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:33:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2245 transitions. [2024-11-09 05:33:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 05:33:43,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:43,826 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:43,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:33:44,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:44,027 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:44,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1970996338, now seen corresponding path program 1 times [2024-11-09 05:33:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398848738] [2024-11-09 05:33:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:33:44,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398848738] [2024-11-09 05:33:44,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398848738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:44,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:33:44,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:33:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500107963] [2024-11-09 05:33:44,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:44,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:44,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:44,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:33:44,187 INFO L87 Difference]: Start difference. First operand 1610 states and 2245 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:33:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:44,406 INFO L93 Difference]: Finished difference Result 2886 states and 4072 transitions. [2024-11-09 05:33:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2024-11-09 05:33:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:44,428 INFO L225 Difference]: With dead ends: 2886 [2024-11-09 05:33:44,428 INFO L226 Difference]: Without dead ends: 2050 [2024-11-09 05:33:44,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:33:44,436 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 69 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:44,438 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 364 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2024-11-09 05:33:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1902. [2024-11-09 05:33:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1567 states have (on average 1.4262922782386727) internal successors, (2235), 1577 states have internal predecessors, (2235), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2024-11-09 05:33:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2693 transitions. [2024-11-09 05:33:44,630 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2693 transitions. Word has length 88 [2024-11-09 05:33:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:44,632 INFO L471 AbstractCegarLoop]: Abstraction has 1902 states and 2693 transitions. [2024-11-09 05:33:44,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:33:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2693 transitions. [2024-11-09 05:33:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 05:33:44,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:44,644 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:44,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 05:33:44,645 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:44,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:44,645 INFO L85 PathProgramCache]: Analyzing trace with hash 446851701, now seen corresponding path program 1 times [2024-11-09 05:33:44,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:44,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876736521] [2024-11-09 05:33:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:44,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 05:33:44,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:44,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876736521] [2024-11-09 05:33:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876736521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:44,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:33:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:33:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917551913] [2024-11-09 05:33:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:44,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:44,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:33:44,779 INFO L87 Difference]: Start difference. First operand 1902 states and 2693 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:33:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:45,149 INFO L93 Difference]: Finished difference Result 5623 states and 8038 transitions. [2024-11-09 05:33:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2024-11-09 05:33:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:45,176 INFO L225 Difference]: With dead ends: 5623 [2024-11-09 05:33:45,176 INFO L226 Difference]: Without dead ends: 3726 [2024-11-09 05:33:45,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:33:45,186 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 139 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:45,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 277 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3726 states. [2024-11-09 05:33:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3726 to 3698. [2024-11-09 05:33:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3051 states have (on average 1.4116683054736152) internal successors, (4307), 3069 states have internal predecessors, (4307), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2024-11-09 05:33:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 5181 transitions. [2024-11-09 05:33:45,490 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 5181 transitions. Word has length 118 [2024-11-09 05:33:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:45,493 INFO L471 AbstractCegarLoop]: Abstraction has 3698 states and 5181 transitions. [2024-11-09 05:33:45,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:33:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 5181 transitions. [2024-11-09 05:33:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 05:33:45,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:45,506 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:45,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:33:45,506 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:45,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -836483802, now seen corresponding path program 1 times [2024-11-09 05:33:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:45,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440053473] [2024-11-09 05:33:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 05:33:45,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:45,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440053473] [2024-11-09 05:33:45,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440053473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:45,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:33:45,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:33:45,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151744089] [2024-11-09 05:33:45,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:45,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:45,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:45,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:33:45,614 INFO L87 Difference]: Start difference. First operand 3698 states and 5181 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:33:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:46,066 INFO L93 Difference]: Finished difference Result 10939 states and 15462 transitions. [2024-11-09 05:33:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2024-11-09 05:33:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:46,111 INFO L225 Difference]: With dead ends: 10939 [2024-11-09 05:33:46,112 INFO L226 Difference]: Without dead ends: 7246 [2024-11-09 05:33:46,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:33:46,129 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 142 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:46,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 280 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2024-11-09 05:33:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 7194. [2024-11-09 05:33:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 5939 states have (on average 1.3960262670483246) internal successors, (8291), 5973 states have internal predecessors, (8291), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2024-11-09 05:33:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 9965 transitions. [2024-11-09 05:33:46,662 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 9965 transitions. Word has length 118 [2024-11-09 05:33:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:46,662 INFO L471 AbstractCegarLoop]: Abstraction has 7194 states and 9965 transitions. [2024-11-09 05:33:46,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:33:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 9965 transitions. [2024-11-09 05:33:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 05:33:46,691 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:46,691 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:33:46,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 05:33:46,692 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:46,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:46,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1773968600, now seen corresponding path program 1 times [2024-11-09 05:33:46,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:46,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128911946] [2024-11-09 05:33:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:46,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-09 05:33:47,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128911946] [2024-11-09 05:33:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128911946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:47,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33711912] [2024-11-09 05:33:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:47,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:47,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:47,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:47,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:33:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:47,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:33:47,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:33:47,284 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:47,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33711912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:47,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:47,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:33:47,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753859577] [2024-11-09 05:33:47,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:47,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:47,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:33:47,288 INFO L87 Difference]: Start difference. First operand 7194 states and 9965 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:33:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:48,160 INFO L93 Difference]: Finished difference Result 17612 states and 24652 transitions. [2024-11-09 05:33:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:48,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2024-11-09 05:33:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:48,233 INFO L225 Difference]: With dead ends: 17612 [2024-11-09 05:33:48,233 INFO L226 Difference]: Without dead ends: 10424 [2024-11-09 05:33:48,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:33:48,255 INFO L432 NwaCegarLoop]: 159 mSDtfsCounter, 81 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:48,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 286 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10424 states. [2024-11-09 05:33:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10424 to 8274. [2024-11-09 05:33:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 6951 states have (on average 1.418932527693857) internal successors, (9863), 6986 states have internal predecessors, (9863), 872 states have call successors, (872), 451 states have call predecessors, (872), 450 states have return successors, (870), 837 states have call predecessors, (870), 870 states have call successors, (870) [2024-11-09 05:33:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11605 transitions. [2024-11-09 05:33:48,914 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11605 transitions. Word has length 134 [2024-11-09 05:33:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:48,915 INFO L471 AbstractCegarLoop]: Abstraction has 8274 states and 11605 transitions. [2024-11-09 05:33:48,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:33:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11605 transitions. [2024-11-09 05:33:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 05:33:48,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:48,947 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:33:48,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:49,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:49,148 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:49,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -213426617, now seen corresponding path program 2 times [2024-11-09 05:33:49,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:49,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258374711] [2024-11-09 05:33:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 05:33:49,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:49,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258374711] [2024-11-09 05:33:49,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258374711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:49,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949054694] [2024-11-09 05:33:49,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:33:49,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:49,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:49,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:49,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:33:49,571 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:33:49,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:33:49,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:33:49,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:33:49,622 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:49,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949054694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:49,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:49,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 05:33:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445169417] [2024-11-09 05:33:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:49,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:49,625 INFO L87 Difference]: Start difference. First operand 8274 states and 11605 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:33:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:50,434 INFO L93 Difference]: Finished difference Result 15418 states and 21851 transitions. [2024-11-09 05:33:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:50,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2024-11-09 05:33:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:50,543 INFO L225 Difference]: With dead ends: 15418 [2024-11-09 05:33:50,544 INFO L226 Difference]: Without dead ends: 11206 [2024-11-09 05:33:50,562 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:50,563 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 90 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:50,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 385 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11206 states. [2024-11-09 05:33:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11206 to 10258. [2024-11-09 05:33:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10258 states, 8807 states have (on average 1.439650278187805) internal successors, (12679), 8842 states have internal predecessors, (12679), 936 states have call successors, (936), 515 states have call predecessors, (936), 514 states have return successors, (934), 901 states have call predecessors, (934), 934 states have call successors, (934) [2024-11-09 05:33:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10258 states to 10258 states and 14549 transitions. [2024-11-09 05:33:51,507 INFO L78 Accepts]: Start accepts. Automaton has 10258 states and 14549 transitions. Word has length 134 [2024-11-09 05:33:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:51,508 INFO L471 AbstractCegarLoop]: Abstraction has 10258 states and 14549 transitions. [2024-11-09 05:33:51,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:33:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 10258 states and 14549 transitions. [2024-11-09 05:33:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 05:33:51,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:51,546 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:33:51,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:51,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 05:33:51,747 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:51,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash 192723372, now seen corresponding path program 1 times [2024-11-09 05:33:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:51,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800812971] [2024-11-09 05:33:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:51,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 05:33:51,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:51,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800812971] [2024-11-09 05:33:51,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800812971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:51,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339973267] [2024-11-09 05:33:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:51,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:51,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:51,946 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:51,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:33:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:52,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:33:52,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:33:52,196 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339973267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:52,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:52,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 05:33:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835680015] [2024-11-09 05:33:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:52,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:52,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:52,203 INFO L87 Difference]: Start difference. First operand 10258 states and 14549 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:33:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:53,034 INFO L93 Difference]: Finished difference Result 19402 states and 27723 transitions. [2024-11-09 05:33:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2024-11-09 05:33:53,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:53,107 INFO L225 Difference]: With dead ends: 19402 [2024-11-09 05:33:53,107 INFO L226 Difference]: Without dead ends: 14182 [2024-11-09 05:33:53,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:53,125 INFO L432 NwaCegarLoop]: 242 mSDtfsCounter, 96 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:53,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 392 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14182 states. [2024-11-09 05:33:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14182 to 13122. [2024-11-09 05:33:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13122 states, 11479 states have (on average 1.4530011325028314) internal successors, (16679), 11514 states have internal predecessors, (16679), 1032 states have call successors, (1032), 611 states have call predecessors, (1032), 610 states have return successors, (1030), 997 states have call predecessors, (1030), 1030 states have call successors, (1030) [2024-11-09 05:33:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13122 states to 13122 states and 18741 transitions. [2024-11-09 05:33:54,006 INFO L78 Accepts]: Start accepts. Automaton has 13122 states and 18741 transitions. Word has length 134 [2024-11-09 05:33:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:54,007 INFO L471 AbstractCegarLoop]: Abstraction has 13122 states and 18741 transitions. [2024-11-09 05:33:54,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:33:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 13122 states and 18741 transitions. [2024-11-09 05:33:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 05:33:54,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:54,054 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:33:54,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:54,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:33:54,256 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:54,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1460543093, now seen corresponding path program 1 times [2024-11-09 05:33:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881512601] [2024-11-09 05:33:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 05:33:54,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:54,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881512601] [2024-11-09 05:33:54,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881512601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894497171] [2024-11-09 05:33:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:54,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:54,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:54,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:33:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:54,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:33:54,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:33:54,695 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:33:54,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894497171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:33:54,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:33:54,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 05:33:54,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778277827] [2024-11-09 05:33:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:33:54,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:33:54,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:33:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:33:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:54,699 INFO L87 Difference]: Start difference. First operand 13122 states and 18741 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:33:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:33:55,927 INFO L93 Difference]: Finished difference Result 25210 states and 36155 transitions. [2024-11-09 05:33:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:33:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2024-11-09 05:33:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:33:56,030 INFO L225 Difference]: With dead ends: 25210 [2024-11-09 05:33:56,030 INFO L226 Difference]: Without dead ends: 18534 [2024-11-09 05:33:56,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:33:56,056 INFO L432 NwaCegarLoop]: 240 mSDtfsCounter, 108 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:33:56,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 390 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:33:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18534 states. [2024-11-09 05:33:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18534 to 17250. [2024-11-09 05:33:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17250 states, 15319 states have (on average 1.4585155689013642) internal successors, (22343), 15354 states have internal predecessors, (22343), 1176 states have call successors, (1176), 755 states have call predecessors, (1176), 754 states have return successors, (1174), 1141 states have call predecessors, (1174), 1174 states have call successors, (1174) [2024-11-09 05:33:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17250 states to 17250 states and 24693 transitions. [2024-11-09 05:33:57,415 INFO L78 Accepts]: Start accepts. Automaton has 17250 states and 24693 transitions. Word has length 134 [2024-11-09 05:33:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:33:57,416 INFO L471 AbstractCegarLoop]: Abstraction has 17250 states and 24693 transitions. [2024-11-09 05:33:57,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:33:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 17250 states and 24693 transitions. [2024-11-09 05:33:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 05:33:57,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:33:57,479 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:33:57,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:33:57,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:33:57,681 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:33:57,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:33:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash 114095687, now seen corresponding path program 1 times [2024-11-09 05:33:57,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:33:57,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632621906] [2024-11-09 05:33:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:57,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:33:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 05:33:58,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:33:58,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632621906] [2024-11-09 05:33:58,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632621906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:33:58,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097208745] [2024-11-09 05:33:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:33:58,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:33:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:33:58,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:33:58,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:33:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:33:58,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:33:58,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:33:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:33:59,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:34:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 05:34:00,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097208745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:34:00,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098033013] [2024-11-09 05:34:00,092 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2024-11-09 05:34:00,093 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:34:00,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:34:00,104 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:34:00,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:34:15,973 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 52 for LOIs [2024-11-09 05:34:15,985 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 122 for LOIs [2024-11-09 05:34:16,107 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 134 for LOIs [2024-11-09 05:34:16,261 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2024-11-09 05:34:16,262 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2024-11-09 05:34:16,280 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 92 for LOIs [2024-11-09 05:34:16,744 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2024-11-09 05:34:16,899 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:34:26,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '214948#(and (exists ((|v_ULTIMATE.start_eval_~tmp~0#1_27| Int)) (and (<= 0 |v_ULTIMATE.start_eval_~tmp~0#1_27|) (not (= |v_ULTIMATE.start_eval_~tmp~0#1_27| 0)) (<= |v_ULTIMATE.start_eval_~tmp~0#1_27| 1))) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= 0 ~t3_pc~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= ~t5_i~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (exists ((|v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_25| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_25| 2147483648)) (not (= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_25| 2147483647))) (= ~t4_i~0 1) (not (= ~token~0 (+ 5 ~local~0))))' at error location [2024-11-09 05:34:26,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:34:26,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:34:26,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-09 05:34:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16107239] [2024-11-09 05:34:26,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:34:26,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:34:26,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:34:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=4011, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 05:34:26,388 INFO L87 Difference]: Start difference. First operand 17250 states and 24693 transitions. Second operand has 21 states, 14 states have (on average 14.928571428571429) internal successors, (209), 16 states have internal predecessors, (209), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 05:34:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:31,335 INFO L93 Difference]: Finished difference Result 62246 states and 89081 transitions. [2024-11-09 05:34:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 05:34:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 14.928571428571429) internal successors, (209), 16 states have internal predecessors, (209), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 138 [2024-11-09 05:34:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:31,496 INFO L225 Difference]: With dead ends: 62246 [2024-11-09 05:34:31,496 INFO L226 Difference]: Without dead ends: 45002 [2024-11-09 05:34:31,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 373 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1016, Invalid=8490, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 05:34:31,540 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 2782 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2782 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:31,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2782 Valid, 982 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 1738 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 05:34:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45002 states. [2024-11-09 05:34:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45002 to 42702. [2024-11-09 05:34:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42702 states, 38011 states have (on average 1.4274552103338507) internal successors, (54259), 38086 states have internal predecessors, (54259), 2744 states have call successors, (2744), 1947 states have call predecessors, (2744), 1946 states have return successors, (2742), 2669 states have call predecessors, (2742), 2742 states have call successors, (2742) [2024-11-09 05:34:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42702 states to 42702 states and 59745 transitions. [2024-11-09 05:34:34,068 INFO L78 Accepts]: Start accepts. Automaton has 42702 states and 59745 transitions. Word has length 138 [2024-11-09 05:34:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:34,068 INFO L471 AbstractCegarLoop]: Abstraction has 42702 states and 59745 transitions. [2024-11-09 05:34:34,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 14.928571428571429) internal successors, (209), 16 states have internal predecessors, (209), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 05:34:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 42702 states and 59745 transitions. [2024-11-09 05:34:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 05:34:34,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:34,126 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:34:34,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:34:34,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:34:34,330 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:34,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -451522099, now seen corresponding path program 1 times [2024-11-09 05:34:34,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:34,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553127179] [2024-11-09 05:34:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:34,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-09 05:34:34,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553127179] [2024-11-09 05:34:34,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553127179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895430636] [2024-11-09 05:34:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:34,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:34,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:34,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:34,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:34:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:35,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:34:35,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:34:35,056 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:34:35,056 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:34:35,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895430636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:34:35,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:34:35,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 05:34:35,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23263822] [2024-11-09 05:34:35,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:34:35,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:34:35,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:35,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:34:35,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:34:35,059 INFO L87 Difference]: Start difference. First operand 42702 states and 59745 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:34:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:37,876 INFO L93 Difference]: Finished difference Result 82370 states and 116243 transitions. [2024-11-09 05:34:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:34:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2024-11-09 05:34:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:38,100 INFO L225 Difference]: With dead ends: 82370 [2024-11-09 05:34:38,100 INFO L226 Difference]: Without dead ends: 53830 [2024-11-09 05:34:38,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:34:38,144 INFO L432 NwaCegarLoop]: 213 mSDtfsCounter, 84 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:38,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 360 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:34:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2024-11-09 05:34:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 52374. [2024-11-09 05:34:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52374 states, 46963 states have (on average 1.4369397185017994) internal successors, (67483), 47038 states have internal predecessors, (67483), 3104 states have call successors, (3104), 2307 states have call predecessors, (3104), 2306 states have return successors, (3102), 3029 states have call predecessors, (3102), 3102 states have call successors, (3102) [2024-11-09 05:34:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52374 states to 52374 states and 73689 transitions. [2024-11-09 05:34:41,862 INFO L78 Accepts]: Start accepts. Automaton has 52374 states and 73689 transitions. Word has length 135 [2024-11-09 05:34:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:41,863 INFO L471 AbstractCegarLoop]: Abstraction has 52374 states and 73689 transitions. [2024-11-09 05:34:41,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:34:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 52374 states and 73689 transitions. [2024-11-09 05:34:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 05:34:41,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:41,938 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:34:41,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:34:42,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:34:42,140 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:42,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 144116911, now seen corresponding path program 1 times [2024-11-09 05:34:42,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:42,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217483589] [2024-11-09 05:34:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:42,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 05:34:42,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217483589] [2024-11-09 05:34:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217483589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710021337] [2024-11-09 05:34:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:42,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:42,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:42,670 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:42,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:34:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:42,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 05:34:42,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:34:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:34:43,050 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:34:43,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710021337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:34:43,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:34:43,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 05:34:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794788075] [2024-11-09 05:34:43,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:34:43,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:34:43,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:43,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:34:43,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:34:43,053 INFO L87 Difference]: Start difference. First operand 52374 states and 73689 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:34:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:46,369 INFO L93 Difference]: Finished difference Result 88070 states and 123404 transitions. [2024-11-09 05:34:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:34:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 141 [2024-11-09 05:34:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:46,591 INFO L225 Difference]: With dead ends: 88070 [2024-11-09 05:34:46,591 INFO L226 Difference]: Without dead ends: 61558 [2024-11-09 05:34:46,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:34:46,634 INFO L432 NwaCegarLoop]: 229 mSDtfsCounter, 118 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:46,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 668 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:34:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2024-11-09 05:34:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 57394. [2024-11-09 05:34:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57394 states, 51127 states have (on average 1.4258415318716138) internal successors, (72899), 51238 states have internal predecessors, (72899), 3598 states have call successors, (3598), 2669 states have call predecessors, (3598), 2668 states have return successors, (3596), 3487 states have call predecessors, (3596), 3596 states have call successors, (3596) [2024-11-09 05:34:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57394 states to 57394 states and 80093 transitions. [2024-11-09 05:34:50,838 INFO L78 Accepts]: Start accepts. Automaton has 57394 states and 80093 transitions. Word has length 141 [2024-11-09 05:34:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:50,839 INFO L471 AbstractCegarLoop]: Abstraction has 57394 states and 80093 transitions. [2024-11-09 05:34:50,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 05:34:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 57394 states and 80093 transitions. [2024-11-09 05:34:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 05:34:50,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:50,908 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:34:50,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:34:51,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:34:51,109 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:51,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash -745636092, now seen corresponding path program 1 times [2024-11-09 05:34:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548353235] [2024-11-09 05:34:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:51,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 05:34:51,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:51,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548353235] [2024-11-09 05:34:51,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548353235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:51,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262020885] [2024-11-09 05:34:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:51,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:51,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:51,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:51,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:34:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:51,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:34:51,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:34:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 05:34:51,636 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:34:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262020885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:34:51,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:34:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:34:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101597443] [2024-11-09 05:34:51,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:34:51,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:34:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:34:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:34:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:34:51,639 INFO L87 Difference]: Start difference. First operand 57394 states and 80093 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:34:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:34:55,235 INFO L93 Difference]: Finished difference Result 99263 states and 139709 transitions. [2024-11-09 05:34:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:34:55,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 140 [2024-11-09 05:34:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:34:55,456 INFO L225 Difference]: With dead ends: 99263 [2024-11-09 05:34:55,456 INFO L226 Difference]: Without dead ends: 57458 [2024-11-09 05:34:55,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:34:55,523 INFO L432 NwaCegarLoop]: 227 mSDtfsCounter, 134 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:34:55,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 362 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:34:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57458 states. [2024-11-09 05:34:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57458 to 56734. [2024-11-09 05:34:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56734 states, 50467 states have (on average 1.4126260724830086) internal successors, (71291), 50578 states have internal predecessors, (71291), 3598 states have call successors, (3598), 2669 states have call predecessors, (3598), 2668 states have return successors, (3596), 3487 states have call predecessors, (3596), 3596 states have call successors, (3596) [2024-11-09 05:34:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56734 states to 56734 states and 78485 transitions. [2024-11-09 05:34:59,318 INFO L78 Accepts]: Start accepts. Automaton has 56734 states and 78485 transitions. Word has length 140 [2024-11-09 05:34:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:34:59,318 INFO L471 AbstractCegarLoop]: Abstraction has 56734 states and 78485 transitions. [2024-11-09 05:34:59,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:34:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 56734 states and 78485 transitions. [2024-11-09 05:34:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 05:34:59,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:34:59,382 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:34:59,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:34:59,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:34:59,583 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:34:59,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:34:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash -254614684, now seen corresponding path program 1 times [2024-11-09 05:34:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:34:59,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059585805] [2024-11-09 05:34:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:34:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:34:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 05:34:59,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:34:59,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059585805] [2024-11-09 05:34:59,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059585805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:34:59,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790708759] [2024-11-09 05:34:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:34:59,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:34:59,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:34:59,882 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:34:59,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3dd41fa6-b75e-4a35-8963-630f2b616fec/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:35:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:35:00,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:35:00,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:35:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 05:35:00,130 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:35:00,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790708759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:35:00,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:35:00,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:35:00,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023734668] [2024-11-09 05:35:00,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:35:00,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:35:00,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:35:00,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:35:00,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:35:00,132 INFO L87 Difference]: Start difference. First operand 56734 states and 78485 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:35:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:35:03,687 INFO L93 Difference]: Finished difference Result 100021 states and 138931 transitions. [2024-11-09 05:35:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:35:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 140 [2024-11-09 05:35:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:35:03,918 INFO L225 Difference]: With dead ends: 100021 [2024-11-09 05:35:03,918 INFO L226 Difference]: Without dead ends: 59536 [2024-11-09 05:35:03,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:35:03,998 INFO L432 NwaCegarLoop]: 160 mSDtfsCounter, 146 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:35:03,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 193 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:35:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59536 states.