./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.10.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.10.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX --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 c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:56:26,300 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:56:26,388 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:56:26,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:56:26,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:56:26,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:56:26,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:56:26,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:56:26,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:56:26,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:56:26,435 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:56:26,436 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:56:26,437 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:56:26,438 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:56:26,438 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:56:26,439 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:56:26,440 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:56:26,441 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:56:26,442 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:56:26,443 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:56:26,443 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:56:26,444 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:56:26,446 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:56:26,447 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:56:26,447 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:56:26,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:56:26,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:56:26,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:56:26,450 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:56:26,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:56:26,452 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:56:26,452 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:56:26,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:56:26,453 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:56:26,454 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:56:26,455 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:56:26,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:26,456 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:56:26,456 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:56:26,456 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:56:26,457 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:56:26,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:56:26,458 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:56:26,458 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:56:26,459 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:56:26,459 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_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c68befe0cb772d649d152823cc17c89d77797d55cc04257d4beaaad2b518a7a0 [2023-11-12 00:56:26,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:56:26,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:56:26,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:56:26,805 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:56:26,806 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:56:26,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/systemc/transmitter.10.cil.c [2023-11-12 00:56:30,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:56:30,695 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:56:30,696 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/sv-benchmarks/c/systemc/transmitter.10.cil.c [2023-11-12 00:56:30,720 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/data/ce8142f8d/72dc76653d8f425eaf985935c4986202/FLAG5b62768fe [2023-11-12 00:56:30,736 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/data/ce8142f8d/72dc76653d8f425eaf985935c4986202 [2023-11-12 00:56:30,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:56:30,741 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:56:30,742 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:30,743 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:56:30,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:56:30,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:30" (1/1) ... [2023-11-12 00:56:30,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506d925d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:30, skipping insertion in model container [2023-11-12 00:56:30,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:30" (1/1) ... [2023-11-12 00:56:30,816 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:56:30,963 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2023-11-12 00:56:31,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:31,160 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:56:31,170 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/sv-benchmarks/c/systemc/transmitter.10.cil.c[706,719] [2023-11-12 00:56:31,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:31,267 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:56:31,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31 WrapperNode [2023-11-12 00:56:31,267 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:31,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:31,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:56:31,269 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:56:31,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,335 INFO L138 Inliner]: procedures = 48, calls = 60, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 741 [2023-11-12 00:56:31,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:31,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:56:31,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:56:31,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:56:31,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,355 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,355 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:56:31,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:56:31,404 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:56:31,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:56:31,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (1/1) ... [2023-11-12 00:56:31,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:31,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:31,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:56:31,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f1251e2-ecfb-4bb6-a8c0-d57b300c7965/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:56:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:56:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:56:31,496 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:56:31,496 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:56:31,496 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:56:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:56:31,497 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:56:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:56:31,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:56:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:56:31,497 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:56:31,497 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:56:31,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:56:31,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:56:31,636 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:56:31,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:56:32,660 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:56:33,375 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:56:33,375 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-11-12 00:56:33,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:33 BoogieIcfgContainer [2023-11-12 00:56:33,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:56:33,387 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:56:33,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:56:33,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:56:33,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:56:30" (1/3) ... [2023-11-12 00:56:33,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7717ff0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:33, skipping insertion in model container [2023-11-12 00:56:33,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:31" (2/3) ... [2023-11-12 00:56:33,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7717ff0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:33, skipping insertion in model container [2023-11-12 00:56:33,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:33" (3/3) ... [2023-11-12 00:56:33,400 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.10.cil.c [2023-11-12 00:56:33,425 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:56:33,425 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:56:33,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:33,529 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1e1a772b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:33,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:56:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 144 states have (on average 1.5138888888888888) internal successors, (218), 146 states have internal predecessors, (218), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:56:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:33,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:33,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:33,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:33,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:33,565 INFO L85 PathProgramCache]: Analyzing trace with hash -911211142, now seen corresponding path program 1 times [2023-11-12 00:56:33,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:33,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345173373] [2023-11-12 00:56:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:34,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:34,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345173373] [2023-11-12 00:56:34,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345173373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:34,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:34,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:56:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057988840] [2023-11-12 00:56:34,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:34,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:34,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:34,676 INFO L87 Difference]: Start difference. First operand has 175 states, 144 states have (on average 1.5138888888888888) internal successors, (218), 146 states have internal predecessors, (218), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:35,421 INFO L93 Difference]: Finished difference Result 508 states and 790 transitions. [2023-11-12 00:56:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 00:56:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:35,452 INFO L225 Difference]: With dead ends: 508 [2023-11-12 00:56:35,452 INFO L226 Difference]: Without dead ends: 334 [2023-11-12 00:56:35,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:35,472 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 455 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:35,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 730 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:35,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-12 00:56:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 331. [2023-11-12 00:56:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 277 states have (on average 1.4657039711191335) internal successors, (406), 278 states have internal predecessors, (406), 41 states have call successors, (41), 12 states have call predecessors, (41), 12 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-12 00:56:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 488 transitions. [2023-11-12 00:56:35,607 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 488 transitions. Word has length 69 [2023-11-12 00:56:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:35,608 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 488 transitions. [2023-11-12 00:56:35,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 488 transitions. [2023-11-12 00:56:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:35,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:35,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:35,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:56:35,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:35,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:35,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1942541957, now seen corresponding path program 1 times [2023-11-12 00:56:35,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:35,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172072372] [2023-11-12 00:56:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:35,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:35,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172072372] [2023-11-12 00:56:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172072372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:35,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531577279] [2023-11-12 00:56:35,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:35,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:35,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:35,872 INFO L87 Difference]: Start difference. First operand 331 states and 488 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:36,879 INFO L93 Difference]: Finished difference Result 1133 states and 1688 transitions. [2023-11-12 00:56:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:56:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 00:56:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:36,888 INFO L225 Difference]: With dead ends: 1133 [2023-11-12 00:56:36,889 INFO L226 Difference]: Without dead ends: 783 [2023-11-12 00:56:36,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:36,893 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 963 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:36,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1107 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:56:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-11-12 00:56:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 771. [2023-11-12 00:56:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 662 states have (on average 1.4561933534743203) internal successors, (964), 654 states have internal predecessors, (964), 80 states have call successors, (80), 26 states have call predecessors, (80), 28 states have return successors, (91), 91 states have call predecessors, (91), 80 states have call successors, (91) [2023-11-12 00:56:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1135 transitions. [2023-11-12 00:56:37,055 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1135 transitions. Word has length 69 [2023-11-12 00:56:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:37,056 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1135 transitions. [2023-11-12 00:56:37,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1135 transitions. [2023-11-12 00:56:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:37,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:37,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:37,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:56:37,069 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:37,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:37,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2078646844, now seen corresponding path program 1 times [2023-11-12 00:56:37,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:37,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671324664] [2023-11-12 00:56:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:37,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:37,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671324664] [2023-11-12 00:56:37,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671324664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:37,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:37,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:37,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750039517] [2023-11-12 00:56:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:37,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:37,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:37,328 INFO L87 Difference]: Start difference. First operand 771 states and 1135 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:38,303 INFO L93 Difference]: Finished difference Result 2705 states and 4031 transitions. [2023-11-12 00:56:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:56:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 00:56:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:38,326 INFO L225 Difference]: With dead ends: 2705 [2023-11-12 00:56:38,334 INFO L226 Difference]: Without dead ends: 1894 [2023-11-12 00:56:38,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:38,348 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 963 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:38,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1068 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:56:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2023-11-12 00:56:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1462. [2023-11-12 00:56:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1257 states have (on average 1.4590294351630868) internal successors, (1834), 1250 states have internal predecessors, (1834), 148 states have call successors, (148), 50 states have call predecessors, (148), 56 states have return successors, (180), 162 states have call predecessors, (180), 148 states have call successors, (180) [2023-11-12 00:56:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2162 transitions. [2023-11-12 00:56:38,578 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2162 transitions. Word has length 69 [2023-11-12 00:56:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:38,578 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 2162 transitions. [2023-11-12 00:56:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2162 transitions. [2023-11-12 00:56:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:38,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:38,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:38,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:56:38,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:38,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash 348309787, now seen corresponding path program 1 times [2023-11-12 00:56:38,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:38,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063828042] [2023-11-12 00:56:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:38,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:38,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063828042] [2023-11-12 00:56:38,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063828042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:38,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:38,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:38,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218724044] [2023-11-12 00:56:38,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:38,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:38,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:38,795 INFO L87 Difference]: Start difference. First operand 1462 states and 2162 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:39,762 INFO L93 Difference]: Finished difference Result 5058 states and 7594 transitions. [2023-11-12 00:56:39,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:56:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 00:56:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:39,794 INFO L225 Difference]: With dead ends: 5058 [2023-11-12 00:56:39,794 INFO L226 Difference]: Without dead ends: 3515 [2023-11-12 00:56:39,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:39,803 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 963 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:39,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 870 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:56:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2023-11-12 00:56:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 2818. [2023-11-12 00:56:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2425 states have (on average 1.4589690721649484) internal successors, (3538), 2422 states have internal predecessors, (3538), 280 states have call successors, (280), 98 states have call predecessors, (280), 112 states have return successors, (352), 298 states have call predecessors, (352), 280 states have call successors, (352) [2023-11-12 00:56:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 4170 transitions. [2023-11-12 00:56:40,045 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 4170 transitions. Word has length 69 [2023-11-12 00:56:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:40,046 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 4170 transitions. [2023-11-12 00:56:40,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 4170 transitions. [2023-11-12 00:56:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:40,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:40,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:40,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:56:40,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:40,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash -926792902, now seen corresponding path program 1 times [2023-11-12 00:56:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55224350] [2023-11-12 00:56:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:40,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:40,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:40,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55224350] [2023-11-12 00:56:40,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55224350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:40,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:40,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:56:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561020420] [2023-11-12 00:56:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:40,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:40,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:40,174 INFO L87 Difference]: Start difference. First operand 2818 states and 4170 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:41,095 INFO L93 Difference]: Finished difference Result 8387 states and 12616 transitions. [2023-11-12 00:56:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 00:56:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:41,143 INFO L225 Difference]: With dead ends: 8387 [2023-11-12 00:56:41,143 INFO L226 Difference]: Without dead ends: 5574 [2023-11-12 00:56:41,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:41,159 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 476 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:41,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 728 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:56:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2023-11-12 00:56:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 5554. [2023-11-12 00:56:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5554 states, 4789 states have (on average 1.448319064522865) internal successors, (6936), 4783 states have internal predecessors, (6936), 540 states have call successors, (540), 196 states have call predecessors, (540), 224 states have return successors, (677), 575 states have call predecessors, (677), 540 states have call successors, (677) [2023-11-12 00:56:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5554 states to 5554 states and 8153 transitions. [2023-11-12 00:56:41,730 INFO L78 Accepts]: Start accepts. Automaton has 5554 states and 8153 transitions. Word has length 69 [2023-11-12 00:56:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:41,730 INFO L495 AbstractCegarLoop]: Abstraction has 5554 states and 8153 transitions. [2023-11-12 00:56:41,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5554 states and 8153 transitions. [2023-11-12 00:56:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:41,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:41,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:41,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:56:41,734 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:41,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash -403472231, now seen corresponding path program 1 times [2023-11-12 00:56:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:41,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845409950] [2023-11-12 00:56:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:41,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:41,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:41,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845409950] [2023-11-12 00:56:41,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845409950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:41,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:41,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019775103] [2023-11-12 00:56:41,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:41,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:41,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:41,933 INFO L87 Difference]: Start difference. First operand 5554 states and 8153 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:43,519 INFO L93 Difference]: Finished difference Result 18706 states and 27920 transitions. [2023-11-12 00:56:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:56:43,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 00:56:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:43,670 INFO L225 Difference]: With dead ends: 18706 [2023-11-12 00:56:43,670 INFO L226 Difference]: Without dead ends: 12833 [2023-11-12 00:56:43,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:43,709 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 963 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:43,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 870 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:56:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12833 states. [2023-11-12 00:56:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12833 to 10811. [2023-11-12 00:56:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10811 states, 9326 states have (on average 1.4457430838515977) internal successors, (13483), 9336 states have internal predecessors, (13483), 1036 states have call successors, (1036), 388 states have call predecessors, (1036), 448 states have return successors, (1317), 1087 states have call predecessors, (1317), 1036 states have call successors, (1317) [2023-11-12 00:56:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10811 states to 10811 states and 15836 transitions. [2023-11-12 00:56:44,739 INFO L78 Accepts]: Start accepts. Automaton has 10811 states and 15836 transitions. Word has length 69 [2023-11-12 00:56:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:44,741 INFO L495 AbstractCegarLoop]: Abstraction has 10811 states and 15836 transitions. [2023-11-12 00:56:44,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 10811 states and 15836 transitions. [2023-11-12 00:56:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:44,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:44,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:56:44,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:44,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash 515502392, now seen corresponding path program 1 times [2023-11-12 00:56:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:44,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511455615] [2023-11-12 00:56:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:44,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:45,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:45,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511455615] [2023-11-12 00:56:45,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511455615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:45,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:45,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484302869] [2023-11-12 00:56:45,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:45,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:45,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:45,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:45,076 INFO L87 Difference]: Start difference. First operand 10811 states and 15836 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:46,577 INFO L93 Difference]: Finished difference Result 31291 states and 46065 transitions. [2023-11-12 00:56:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:56:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-11-12 00:56:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:46,737 INFO L225 Difference]: With dead ends: 31291 [2023-11-12 00:56:46,737 INFO L226 Difference]: Without dead ends: 20486 [2023-11-12 00:56:46,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:56:46,780 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 755 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:46,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 715 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:56:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20486 states. [2023-11-12 00:56:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20486 to 18134. [2023-11-12 00:56:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18134 states, 15793 states have (on average 1.437155701893244) internal successors, (22697), 15812 states have internal predecessors, (22697), 1572 states have call successors, (1572), 648 states have call predecessors, (1572), 768 states have return successors, (2134), 1674 states have call predecessors, (2134), 1572 states have call successors, (2134) [2023-11-12 00:56:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18134 states to 18134 states and 26403 transitions. [2023-11-12 00:56:48,256 INFO L78 Accepts]: Start accepts. Automaton has 18134 states and 26403 transitions. Word has length 69 [2023-11-12 00:56:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:48,257 INFO L495 AbstractCegarLoop]: Abstraction has 18134 states and 26403 transitions. [2023-11-12 00:56:48,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18134 states and 26403 transitions. [2023-11-12 00:56:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 00:56:48,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:48,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:48,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:56:48,261 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:48,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2066926106, now seen corresponding path program 1 times [2023-11-12 00:56:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:48,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609947647] [2023-11-12 00:56:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:48,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:48,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609947647] [2023-11-12 00:56:48,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609947647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:48,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:48,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:48,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347897558] [2023-11-12 00:56:48,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:48,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:48,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:48,755 INFO L87 Difference]: Start difference. First operand 18134 states and 26403 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:51,676 INFO L93 Difference]: Finished difference Result 60702 states and 88831 transitions. [2023-11-12 00:56:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:56:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-11-12 00:56:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:51,980 INFO L225 Difference]: With dead ends: 60702 [2023-11-12 00:56:51,980 INFO L226 Difference]: Without dead ends: 42574 [2023-11-12 00:56:52,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:56:52,034 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 748 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:52,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 720 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42574 states. [2023-11-12 00:56:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42574 to 35664. [2023-11-12 00:56:54,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35664 states, 31083 states have (on average 1.4314898819290287) internal successors, (44495), 31124 states have internal predecessors, (44495), 3044 states have call successors, (3044), 1296 states have call predecessors, (3044), 1536 states have return successors, (4108), 3244 states have call predecessors, (4108), 3044 states have call successors, (4108) [2023-11-12 00:56:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35664 states to 35664 states and 51647 transitions. [2023-11-12 00:56:54,815 INFO L78 Accepts]: Start accepts. Automaton has 35664 states and 51647 transitions. Word has length 71 [2023-11-12 00:56:54,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:54,815 INFO L495 AbstractCegarLoop]: Abstraction has 35664 states and 51647 transitions. [2023-11-12 00:56:54,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 35664 states and 51647 transitions. [2023-11-12 00:56:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-12 00:56:54,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:54,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:54,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:56:54,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:54,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1030062229, now seen corresponding path program 1 times [2023-11-12 00:56:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061102093] [2023-11-12 00:56:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:55,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061102093] [2023-11-12 00:56:55,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061102093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:55,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:55,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:55,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027380082] [2023-11-12 00:56:55,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:55,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:55,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:55,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:55,128 INFO L87 Difference]: Start difference. First operand 35664 states and 51647 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:58,690 INFO L93 Difference]: Finished difference Result 94772 states and 137777 transitions. [2023-11-12 00:56:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:56:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2023-11-12 00:56:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:58,976 INFO L225 Difference]: With dead ends: 94772 [2023-11-12 00:56:58,976 INFO L226 Difference]: Without dead ends: 59114 [2023-11-12 00:56:59,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:56:59,055 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 694 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:59,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 746 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:56:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59114 states. [2023-11-12 00:57:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59114 to 53008. [2023-11-12 00:57:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53008 states, 46171 states have (on average 1.4262415802126875) internal successors, (65851), 46196 states have internal predecessors, (65851), 4532 states have call successors, (4532), 1952 states have call predecessors, (4532), 2304 states have return successors, (6060), 4860 states have call predecessors, (6060), 4532 states have call successors, (6060) [2023-11-12 00:57:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53008 states to 53008 states and 76443 transitions. [2023-11-12 00:57:03,170 INFO L78 Accepts]: Start accepts. Automaton has 53008 states and 76443 transitions. Word has length 73 [2023-11-12 00:57:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:03,171 INFO L495 AbstractCegarLoop]: Abstraction has 53008 states and 76443 transitions. [2023-11-12 00:57:03,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:57:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 53008 states and 76443 transitions. [2023-11-12 00:57:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 00:57:03,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:03,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:03,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:57:03,176 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:03,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1036965926, now seen corresponding path program 1 times [2023-11-12 00:57:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:03,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722321240] [2023-11-12 00:57:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:03,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:03,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722321240] [2023-11-12 00:57:03,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722321240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:03,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:03,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:57:03,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876043998] [2023-11-12 00:57:03,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:03,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:57:03,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:57:03,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:03,557 INFO L87 Difference]: Start difference. First operand 53008 states and 76443 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:57:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:08,689 INFO L93 Difference]: Finished difference Result 140124 states and 202877 transitions. [2023-11-12 00:57:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:57:08,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 75 [2023-11-12 00:57:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:09,117 INFO L225 Difference]: With dead ends: 140124 [2023-11-12 00:57:09,117 INFO L226 Difference]: Without dead ends: 87122 [2023-11-12 00:57:09,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:57:09,243 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 692 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:09,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 627 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:57:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87122 states.