./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu.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_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/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_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/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_6790219d-0821-47a6-a1af-deefc5070d2a/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 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:56:34,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:56:35,101 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:56:35,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:56:35,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:56:35,160 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:56:35,161 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:56:35,162 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:56:35,163 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:56:35,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:56:35,168 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:56:35,169 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:56:35,169 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:56:35,171 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:56:35,171 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:56:35,172 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:56:35,172 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:56:35,173 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:56:35,173 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:56:35,174 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:56:35,174 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:56:35,175 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:56:35,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:56:35,176 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:56:35,177 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:56:35,177 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:56:35,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:56:35,178 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:56:35,178 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:56:35,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:56:35,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:56:35,181 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:56:35,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:56:35,181 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:56:35,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:56:35,182 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:56:35,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:35,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:56:35,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:56:35,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:56:35,189 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:56:35,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:56:35,190 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:56:35,190 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:56:35,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:56:35,191 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_6790219d-0821-47a6-a1af-deefc5070d2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb [2023-11-12 00:56:35,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:56:35,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:56:35,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:56:35,596 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:56:35,596 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:56:35,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/systemc/kundu.cil.c [2023-11-12 00:56:38,736 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:56:38,992 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:56:38,992 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/sv-benchmarks/c/systemc/kundu.cil.c [2023-11-12 00:56:39,015 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/data/7f9edfd0e/b8f8e43bd17549f79f2421e6ab20b3b0/FLAG16144876e [2023-11-12 00:56:39,041 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/data/7f9edfd0e/b8f8e43bd17549f79f2421e6ab20b3b0 [2023-11-12 00:56:39,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:56:39,050 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:56:39,054 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:39,054 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:56:39,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:56:39,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2807bfb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39, skipping insertion in model container [2023-11-12 00:56:39,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,109 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:56:39,297 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_6790219d-0821-47a6-a1af-deefc5070d2a/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2023-11-12 00:56:39,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:39,376 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:56:39,389 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_6790219d-0821-47a6-a1af-deefc5070d2a/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2023-11-12 00:56:39,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:39,450 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:56:39,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39 WrapperNode [2023-11-12 00:56:39,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:39,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:39,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:56:39,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:56:39,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,486 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,537 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 317 [2023-11-12 00:56:39,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:39,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:56:39,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:56:39,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:56:39,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,603 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,606 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:56:39,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:56:39,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:56:39,616 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:56:39,617 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (1/1) ... [2023-11-12 00:56:39,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:39,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:56:39,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6790219d-0821-47a6-a1af-deefc5070d2a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:56:39,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:56:39,706 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2023-11-12 00:56:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2023-11-12 00:56:39,706 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 00:56:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 00:56:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:56:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:56:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:56:39,708 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:56:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:56:39,708 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:56:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:56:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:56:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:56:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:56:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:56:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:56:39,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:56:39,816 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:56:39,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:56:40,311 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:56:40,523 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:56:40,523 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 00:56:40,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:40 BoogieIcfgContainer [2023-11-12 00:56:40,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:56:40,531 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:56:40,531 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:56:40,534 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:56:40,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:56:39" (1/3) ... [2023-11-12 00:56:40,536 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:40, skipping insertion in model container [2023-11-12 00:56:40,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:39" (2/3) ... [2023-11-12 00:56:40,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:40, skipping insertion in model container [2023-11-12 00:56:40,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:40" (3/3) ... [2023-11-12 00:56:40,539 INFO L112 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2023-11-12 00:56:40,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:56:40,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:56:40,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:40,641 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;@4aa32508, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:40,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:56:40,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-12 00:56:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 00:56:40,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:40,663 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] [2023-11-12 00:56:40,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:40,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash -679293870, now seen corresponding path program 1 times [2023-11-12 00:56:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:40,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535235620] [2023-11-12 00:56:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:41,180 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 00:56:41,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535235620] [2023-11-12 00:56:41,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535235620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:41,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:41,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:56:41,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40673463] [2023-11-12 00:56:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:41,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:41,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:41,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:41,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:41,224 INFO L87 Difference]: Start difference. First operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:41,653 INFO L93 Difference]: Finished difference Result 263 states and 391 transitions. [2023-11-12 00:56:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-12 00:56:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:41,668 INFO L225 Difference]: With dead ends: 263 [2023-11-12 00:56:41,669 INFO L226 Difference]: Without dead ends: 171 [2023-11-12 00:56:41,673 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 00:56:41,678 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 225 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:41,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 348 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:56:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-12 00:56:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2023-11-12 00:56:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.4308943089430894) internal successors, (176), 127 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-12 00:56:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 231 transitions. [2023-11-12 00:56:41,751 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 231 transitions. Word has length 39 [2023-11-12 00:56:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:41,752 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 231 transitions. [2023-11-12 00:56:41,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 231 transitions. [2023-11-12 00:56:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 00:56:41,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:41,756 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] [2023-11-12 00:56:41,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:56:41,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1650968557, now seen corresponding path program 1 times [2023-11-12 00:56:41,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:41,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379340147] [2023-11-12 00:56:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:41,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:41,781 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 00:56:41,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379340147] [2023-11-12 00:56:41,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379340147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:41,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:41,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:41,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943477477] [2023-11-12 00:56:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:41,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:41,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:41,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:41,936 INFO L87 Difference]: Start difference. First operand 165 states and 231 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:42,484 INFO L93 Difference]: Finished difference Result 693 states and 969 transitions. [2023-11-12 00:56:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:56:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-11-12 00:56:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:42,492 INFO L225 Difference]: With dead ends: 693 [2023-11-12 00:56:42,492 INFO L226 Difference]: Without dead ends: 508 [2023-11-12 00:56:42,495 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 00:56:42,497 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 474 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:42,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 477 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:56:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-12 00:56:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 389. [2023-11-12 00:56:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 298 states have (on average 1.4261744966442953) internal successors, (425), 303 states have internal predecessors, (425), 60 states have call successors, (60), 30 states have call predecessors, (60), 30 states have return successors, (60), 56 states have call predecessors, (60), 57 states have call successors, (60) [2023-11-12 00:56:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 545 transitions. [2023-11-12 00:56:42,577 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 545 transitions. Word has length 39 [2023-11-12 00:56:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:42,578 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 545 transitions. [2023-11-12 00:56:42,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 545 transitions. [2023-11-12 00:56:42,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 00:56:42,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:42,583 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] [2023-11-12 00:56:42,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:56:42,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:42,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash 567263234, now seen corresponding path program 1 times [2023-11-12 00:56:42,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:42,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914253865] [2023-11-12 00:56:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:42,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:42,679 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 00:56:42,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:42,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914253865] [2023-11-12 00:56:42,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914253865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:42,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107020347] [2023-11-12 00:56:42,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:42,683 INFO L87 Difference]: Start difference. First operand 389 states and 545 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:56:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:42,955 INFO L93 Difference]: Finished difference Result 1011 states and 1419 transitions. [2023-11-12 00:56:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:56:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2023-11-12 00:56:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:42,962 INFO L225 Difference]: With dead ends: 1011 [2023-11-12 00:56:42,962 INFO L226 Difference]: Without dead ends: 628 [2023-11-12 00:56:42,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:42,965 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 90 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:42,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 414 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-11-12 00:56:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 607. [2023-11-12 00:56:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 463 states have (on average 1.4168466522678185) internal successors, (656), 476 states have internal predecessors, (656), 93 states have call successors, (93), 50 states have call predecessors, (93), 50 states have return successors, (93), 81 states have call predecessors, (93), 90 states have call successors, (93) [2023-11-12 00:56:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 842 transitions. [2023-11-12 00:56:43,064 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 842 transitions. Word has length 40 [2023-11-12 00:56:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:43,065 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 842 transitions. [2023-11-12 00:56:43,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 00:56:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 842 transitions. [2023-11-12 00:56:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:56:43,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:43,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:43,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:56:43,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:43,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1879382832, now seen corresponding path program 1 times [2023-11-12 00:56:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550130376] [2023-11-12 00:56:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:43,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:43,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:43,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550130376] [2023-11-12 00:56:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550130376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:43,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:43,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895052533] [2023-11-12 00:56:43,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:43,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:43,231 INFO L87 Difference]: Start difference. First operand 607 states and 842 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:56:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:43,608 INFO L93 Difference]: Finished difference Result 1710 states and 2394 transitions. [2023-11-12 00:56:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:56:43,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2023-11-12 00:56:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:43,619 INFO L225 Difference]: With dead ends: 1710 [2023-11-12 00:56:43,619 INFO L226 Difference]: Without dead ends: 1171 [2023-11-12 00:56:43,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:56:43,623 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 197 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:43,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 706 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:43,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-11-12 00:56:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1135. [2023-11-12 00:56:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 872 states have (on average 1.4094036697247707) internal successors, (1229), 895 states have internal predecessors, (1229), 168 states have call successors, (168), 93 states have call predecessors, (168), 94 states have return successors, (170), 147 states have call predecessors, (170), 165 states have call successors, (170) [2023-11-12 00:56:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1567 transitions. [2023-11-12 00:56:43,785 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1567 transitions. Word has length 50 [2023-11-12 00:56:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:43,787 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1567 transitions. [2023-11-12 00:56:43,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:56:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1567 transitions. [2023-11-12 00:56:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-12 00:56:43,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:43,795 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] [2023-11-12 00:56:43,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:56:43,796 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:43,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash -780727868, now seen corresponding path program 1 times [2023-11-12 00:56:43,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:43,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887307579] [2023-11-12 00:56:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:43,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:43,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:44,081 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 00:56:44,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:44,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887307579] [2023-11-12 00:56:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887307579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:44,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:44,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617193958] [2023-11-12 00:56:44,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:44,085 INFO L87 Difference]: Start difference. First operand 1135 states and 1567 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:56:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:44,571 INFO L93 Difference]: Finished difference Result 3393 states and 4682 transitions. [2023-11-12 00:56:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:56:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2023-11-12 00:56:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:44,588 INFO L225 Difference]: With dead ends: 3393 [2023-11-12 00:56:44,589 INFO L226 Difference]: Without dead ends: 2264 [2023-11-12 00:56:44,593 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 00:56:44,594 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 296 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:44,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 292 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2023-11-12 00:56:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2065. [2023-11-12 00:56:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1597 states have (on average 1.3994990607388853) internal successors, (2235), 1621 states have internal predecessors, (2235), 291 states have call successors, (291), 173 states have call predecessors, (291), 176 states have return successors, (297), 271 states have call predecessors, (297), 288 states have call successors, (297) [2023-11-12 00:56:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2823 transitions. [2023-11-12 00:56:44,814 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2823 transitions. Word has length 53 [2023-11-12 00:56:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:44,815 INFO L495 AbstractCegarLoop]: Abstraction has 2065 states and 2823 transitions. [2023-11-12 00:56:44,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 00:56:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2823 transitions. [2023-11-12 00:56:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:56:44,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:44,818 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] [2023-11-12 00:56:44,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:56:44,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:44,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -939789985, now seen corresponding path program 1 times [2023-11-12 00:56:44,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:44,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136481036] [2023-11-12 00:56:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:44,864 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 00:56:44,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:44,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136481036] [2023-11-12 00:56:44,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136481036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:44,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:44,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166568426] [2023-11-12 00:56:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:44,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:44,867 INFO L87 Difference]: Start difference. First operand 2065 states and 2823 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:56:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:45,194 INFO L93 Difference]: Finished difference Result 4741 states and 6485 transitions. [2023-11-12 00:56:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 54 [2023-11-12 00:56:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:45,215 INFO L225 Difference]: With dead ends: 4741 [2023-11-12 00:56:45,216 INFO L226 Difference]: Without dead ends: 2681 [2023-11-12 00:56:45,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:45,227 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 93 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:45,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 202 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:56:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2023-11-12 00:56:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2242. [2023-11-12 00:56:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1689 states have (on average 1.3457667258732977) internal successors, (2273), 1717 states have internal predecessors, (2273), 346 states have call successors, (346), 207 states have call predecessors, (346), 206 states have return successors, (343), 318 states have call predecessors, (343), 343 states have call successors, (343) [2023-11-12 00:56:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 2962 transitions. [2023-11-12 00:56:45,522 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 2962 transitions. Word has length 54 [2023-11-12 00:56:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:45,524 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 2962 transitions. [2023-11-12 00:56:45,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:56:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 2962 transitions. [2023-11-12 00:56:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 00:56:45,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:45,528 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] [2023-11-12 00:56:45,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:56:45,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:45,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2108003415, now seen corresponding path program 1 times [2023-11-12 00:56:45,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:45,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658636164] [2023-11-12 00:56:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:45,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:45,664 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 00:56:45,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:45,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658636164] [2023-11-12 00:56:45,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658636164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:45,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:45,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:45,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837403007] [2023-11-12 00:56:45,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:45,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:45,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:45,667 INFO L87 Difference]: Start difference. First operand 2242 states and 2962 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:56:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:46,183 INFO L93 Difference]: Finished difference Result 5277 states and 6989 transitions. [2023-11-12 00:56:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:56:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2023-11-12 00:56:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:46,209 INFO L225 Difference]: With dead ends: 5277 [2023-11-12 00:56:46,209 INFO L226 Difference]: Without dead ends: 3266 [2023-11-12 00:56:46,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:46,219 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 190 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:46,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 445 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2023-11-12 00:56:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 3198. [2023-11-12 00:56:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2417 states have (on average 1.3475382705833678) internal successors, (3257), 2447 states have internal predecessors, (3257), 488 states have call successors, (488), 293 states have call predecessors, (488), 292 states have return successors, (485), 458 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-12 00:56:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4230 transitions. [2023-11-12 00:56:46,564 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4230 transitions. Word has length 55 [2023-11-12 00:56:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:46,564 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 4230 transitions. [2023-11-12 00:56:46,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 00:56:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4230 transitions. [2023-11-12 00:56:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-12 00:56:46,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:46,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:46,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:56:46,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:46,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1593839665, now seen corresponding path program 1 times [2023-11-12 00:56:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:46,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957782726] [2023-11-12 00:56:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:56:46,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957782726] [2023-11-12 00:56:46,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957782726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:46,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:46,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230392580] [2023-11-12 00:56:46,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:46,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:46,768 INFO L87 Difference]: Start difference. First operand 3198 states and 4230 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 00:56:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:47,629 INFO L93 Difference]: Finished difference Result 9638 states and 12721 transitions. [2023-11-12 00:56:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:56:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2023-11-12 00:56:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:47,682 INFO L225 Difference]: With dead ends: 9638 [2023-11-12 00:56:47,682 INFO L226 Difference]: Without dead ends: 6446 [2023-11-12 00:56:47,693 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 00:56:47,694 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 305 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:47,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 251 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6446 states. [2023-11-12 00:56:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6446 to 6126. [2023-11-12 00:56:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 4617 states have (on average 1.327485380116959) internal successors, (6129), 4655 states have internal predecessors, (6129), 936 states have call successors, (936), 573 states have call predecessors, (936), 572 states have return successors, (933), 898 states have call predecessors, (933), 933 states have call successors, (933) [2023-11-12 00:56:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 7998 transitions. [2023-11-12 00:56:48,325 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 7998 transitions. Word has length 57 [2023-11-12 00:56:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:48,325 INFO L495 AbstractCegarLoop]: Abstraction has 6126 states and 7998 transitions. [2023-11-12 00:56:48,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 00:56:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 7998 transitions. [2023-11-12 00:56:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-12 00:56:48,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:48,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:48,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:56:48,329 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:48,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash -981896383, now seen corresponding path program 1 times [2023-11-12 00:56:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:48,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631030735] [2023-11-12 00:56:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:48,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:56:48,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:48,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631030735] [2023-11-12 00:56:48,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631030735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:48,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:48,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647601426] [2023-11-12 00:56:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:48,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:48,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:48,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:48,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:48,406 INFO L87 Difference]: Start difference. First operand 6126 states and 7998 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 00:56:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:49,979 INFO L93 Difference]: Finished difference Result 20396 states and 27116 transitions. [2023-11-12 00:56:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:56:49,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2023-11-12 00:56:49,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:50,087 INFO L225 Difference]: With dead ends: 20396 [2023-11-12 00:56:50,088 INFO L226 Difference]: Without dead ends: 14276 [2023-11-12 00:56:50,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:50,109 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 544 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:50,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 403 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2023-11-12 00:56:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 10725. [2023-11-12 00:56:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 8171 states have (on average 1.3402276343164852) internal successors, (10951), 8265 states have internal predecessors, (10951), 1543 states have call successors, (1543), 1011 states have call predecessors, (1543), 1010 states have return successors, (1632), 1449 states have call predecessors, (1632), 1540 states have call successors, (1632) [2023-11-12 00:56:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 14126 transitions. [2023-11-12 00:56:51,205 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 14126 transitions. Word has length 59 [2023-11-12 00:56:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:51,206 INFO L495 AbstractCegarLoop]: Abstraction has 10725 states and 14126 transitions. [2023-11-12 00:56:51,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 00:56:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 14126 transitions. [2023-11-12 00:56:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-12 00:56:51,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:51,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:51,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:56:51,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:51,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -683441854, now seen corresponding path program 1 times [2023-11-12 00:56:51,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:51,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432687282] [2023-11-12 00:56:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:56:51,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:51,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432687282] [2023-11-12 00:56:51,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432687282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:51,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:51,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:51,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524077955] [2023-11-12 00:56:51,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:51,330 INFO L87 Difference]: Start difference. First operand 10725 states and 14126 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:52,973 INFO L93 Difference]: Finished difference Result 25885 states and 34123 transitions. [2023-11-12 00:56:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:56:52,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2023-11-12 00:56:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:53,045 INFO L225 Difference]: With dead ends: 25885 [2023-11-12 00:56:53,046 INFO L226 Difference]: Without dead ends: 15708 [2023-11-12 00:56:53,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:53,079 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 284 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:53,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 543 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:56:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15708 states. [2023-11-12 00:56:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15708 to 15433. [2023-11-12 00:56:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15433 states, 11779 states have (on average 1.3395874013074114) internal successors, (15779), 11883 states have internal predecessors, (15779), 2209 states have call successors, (2209), 1445 states have call predecessors, (2209), 1444 states have return successors, (2334), 2105 states have call predecessors, (2334), 2206 states have call successors, (2334) [2023-11-12 00:56:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15433 states to 15433 states and 20322 transitions. [2023-11-12 00:56:54,691 INFO L78 Accepts]: Start accepts. Automaton has 15433 states and 20322 transitions. Word has length 63 [2023-11-12 00:56:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:54,692 INFO L495 AbstractCegarLoop]: Abstraction has 15433 states and 20322 transitions. [2023-11-12 00:56:54,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 15433 states and 20322 transitions. [2023-11-12 00:56:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-12 00:56:54,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:54,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:54,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:56:54,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:54,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1991503280, now seen corresponding path program 1 times [2023-11-12 00:56:54,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:54,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929647195] [2023-11-12 00:56:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:56:54,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:54,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929647195] [2023-11-12 00:56:54,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929647195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:54,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:54,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:56:54,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759519394] [2023-11-12 00:56:54,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:54,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:56:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:56:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:54,867 INFO L87 Difference]: Start difference. First operand 15433 states and 20322 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:56,852 INFO L93 Difference]: Finished difference Result 39696 states and 52433 transitions. [2023-11-12 00:56:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:56:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-11-12 00:56:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:56,952 INFO L225 Difference]: With dead ends: 39696 [2023-11-12 00:56:56,952 INFO L226 Difference]: Without dead ends: 24811 [2023-11-12 00:56:56,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:56:56,991 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 292 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:56,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 905 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:56:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24811 states. [2023-11-12 00:56:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24811 to 24281. [2023-11-12 00:56:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24281 states, 18575 states have (on average 1.3428263795423956) internal successors, (24943), 18697 states have internal predecessors, (24943), 3451 states have call successors, (3451), 2255 states have call predecessors, (3451), 2254 states have return successors, (3668), 3329 states have call predecessors, (3668), 3448 states have call successors, (3668) [2023-11-12 00:56:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24281 states to 24281 states and 32062 transitions. [2023-11-12 00:56:59,646 INFO L78 Accepts]: Start accepts. Automaton has 24281 states and 32062 transitions. Word has length 66 [2023-11-12 00:56:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:59,646 INFO L495 AbstractCegarLoop]: Abstraction has 24281 states and 32062 transitions. [2023-11-12 00:56:59,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24281 states and 32062 transitions. [2023-11-12 00:56:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:56:59,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:59,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:59,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 00:56:59,657 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:59,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:59,658 INFO L85 PathProgramCache]: Analyzing trace with hash 640347949, now seen corresponding path program 1 times [2023-11-12 00:56:59,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:59,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627289329] [2023-11-12 00:56:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:59,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:56:59,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:59,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627289329] [2023-11-12 00:56:59,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627289329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:59,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:59,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:56:59,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648159418] [2023-11-12 00:56:59,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:59,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:59,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:59,746 INFO L87 Difference]: Start difference. First operand 24281 states and 32062 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:57:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:02,528 INFO L93 Difference]: Finished difference Result 53779 states and 70488 transitions. [2023-11-12 00:57:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:57:02,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2023-11-12 00:57:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:02,667 INFO L225 Difference]: With dead ends: 53779 [2023-11-12 00:57:02,667 INFO L226 Difference]: Without dead ends: 29504 [2023-11-12 00:57:02,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:02,718 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 379 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:02,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 448 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:57:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29504 states. [2023-11-12 00:57:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29504 to 26293. [2023-11-12 00:57:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26293 states, 20143 states have (on average 1.3327210445315991) internal successors, (26845), 20265 states have internal predecessors, (26845), 3673 states have call successors, (3673), 2477 states have call predecessors, (3673), 2476 states have return successors, (3890), 3551 states have call predecessors, (3890), 3670 states have call successors, (3890) [2023-11-12 00:57:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26293 states to 26293 states and 34408 transitions. [2023-11-12 00:57:05,291 INFO L78 Accepts]: Start accepts. Automaton has 26293 states and 34408 transitions. Word has length 69 [2023-11-12 00:57:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:05,292 INFO L495 AbstractCegarLoop]: Abstraction has 26293 states and 34408 transitions. [2023-11-12 00:57:05,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 00:57:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 26293 states and 34408 transitions. [2023-11-12 00:57:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-12 00:57:05,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:05,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:05,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:57:05,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:05,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash -21606109, now seen corresponding path program 1 times [2023-11-12 00:57:05,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:05,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461931610] [2023-11-12 00:57:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:05,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:57:05,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:05,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461931610] [2023-11-12 00:57:05,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461931610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:05,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:05,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:57:05,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946450411] [2023-11-12 00:57:05,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:05,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:57:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:05,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:57:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:05,389 INFO L87 Difference]: Start difference. First operand 26293 states and 34408 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:57:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:07,945 INFO L93 Difference]: Finished difference Result 57882 states and 75846 transitions. [2023-11-12 00:57:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:57:07,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2023-11-12 00:57:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:08,181 INFO L225 Difference]: With dead ends: 57882 [2023-11-12 00:57:08,182 INFO L226 Difference]: Without dead ends: 32157 [2023-11-12 00:57:08,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:57:08,230 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 98 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:08,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 459 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32157 states. [2023-11-12 00:57:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32157 to 31717. [2023-11-12 00:57:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31717 states, 24187 states have (on average 1.3237276222764296) internal successors, (32017), 24435 states have internal predecessors, (32017), 4489 states have call successors, (4489), 3041 states have call predecessors, (4489), 3040 states have return successors, (4754), 4241 states have call predecessors, (4754), 4486 states have call successors, (4754) [2023-11-12 00:57:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31717 states to 31717 states and 41260 transitions. [2023-11-12 00:57:10,807 INFO L78 Accepts]: Start accepts. Automaton has 31717 states and 41260 transitions. Word has length 70 [2023-11-12 00:57:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:10,807 INFO L495 AbstractCegarLoop]: Abstraction has 31717 states and 41260 transitions. [2023-11-12 00:57:10,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:57:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 31717 states and 41260 transitions. [2023-11-12 00:57:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 00:57:10,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:10,812 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:10,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:57:10,813 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:10,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:10,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2076809289, now seen corresponding path program 1 times [2023-11-12 00:57:10,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:10,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633351004] [2023-11-12 00:57:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:10,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:57:10,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:10,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633351004] [2023-11-12 00:57:10,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633351004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:10,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:10,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:57:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636552763] [2023-11-12 00:57:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:57:10,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:57:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:57:10,974 INFO L87 Difference]: Start difference. First operand 31717 states and 41260 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:57:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:15,188 INFO L93 Difference]: Finished difference Result 85211 states and 110831 transitions. [2023-11-12 00:57:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:57:15,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 71 [2023-11-12 00:57:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:15,409 INFO L225 Difference]: With dead ends: 85211 [2023-11-12 00:57:15,410 INFO L226 Difference]: Without dead ends: 53500 [2023-11-12 00:57:15,477 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 00:57:15,478 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 263 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:15,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 226 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:57:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53500 states. [2023-11-12 00:57:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53500 to 52721. [2023-11-12 00:57:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52721 states, 39454 states have (on average 1.2966492624321995) internal successors, (51158), 39823 states have internal predecessors, (51158), 8041 states have call successors, (8041), 5226 states have call predecessors, (8041), 5225 states have return successors, (8574), 7672 states have call predecessors, (8574), 8038 states have call successors, (8574) [2023-11-12 00:57:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52721 states to 52721 states and 67773 transitions. [2023-11-12 00:57:20,499 INFO L78 Accepts]: Start accepts. Automaton has 52721 states and 67773 transitions. Word has length 71 [2023-11-12 00:57:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:20,499 INFO L495 AbstractCegarLoop]: Abstraction has 52721 states and 67773 transitions. [2023-11-12 00:57:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:57:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 52721 states and 67773 transitions. [2023-11-12 00:57:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 00:57:20,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:20,505 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:20,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 00:57:20,505 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:57:20,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 676125634, now seen corresponding path program 1 times [2023-11-12 00:57:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:20,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537954684] [2023-11-12 00:57:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:20,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:57:20,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537954684] [2023-11-12 00:57:20,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537954684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:20,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:57:20,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597060099] [2023-11-12 00:57:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:57:20,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:57:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:57:20,593 INFO L87 Difference]: Start difference. First operand 52721 states and 67773 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)