./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ --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 5c011d5a0fba56387056dfb1e4fd33cceb66b52965c25e0a625e04747833af64 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:09,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:09,990 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:17:09,995 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:09,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:10,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:10,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:10,046 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:10,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:10,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:10,055 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:10,056 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:10,056 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:10,058 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:10,059 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:10,059 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:10,059 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:10,060 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:10,060 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:10,061 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:10,061 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:10,062 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:10,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:10,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:10,064 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:17:10,064 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:10,064 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:17:10,065 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:10,065 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:10,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:10,067 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:10,067 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:17:10,067 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:10,067 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:10,068 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:10,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:10,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:10,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:10,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:10,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:10,069 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:10,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:10,070 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:10,070 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:10,071 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:10,071 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_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c011d5a0fba56387056dfb1e4fd33cceb66b52965c25e0a625e04747833af64 [2023-11-19 05:17:10,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:10,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:10,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:10,370 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:10,371 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:10,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-19 05:17:13,505 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:13,761 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:13,762 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-19 05:17:13,781 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/data/f537d847f/c5663c6372de47a399c3614880257e7a/FLAGbc760ed70 [2023-11-19 05:17:13,796 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/data/f537d847f/c5663c6372de47a399c3614880257e7a [2023-11-19 05:17:13,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:13,800 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:13,802 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:13,802 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:13,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:13,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f35a506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:13, skipping insertion in model container [2023-11-19 05:17:13,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:13" (1/1) ... [2023-11-19 05:17:13,865 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:14,095 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_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2023-11-19 05:17:14,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:14,168 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:14,218 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_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2023-11-19 05:17:14,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:14,275 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:14,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14 WrapperNode [2023-11-19 05:17:14,275 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:14,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:14,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:14,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:14,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,302 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,357 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 625 [2023-11-19 05:17:14,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:14,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:14,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:14,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:14,368 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,373 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,401 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,407 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:14,408 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:14,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:14,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:14,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (1/1) ... [2023-11-19 05:17:14,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:14,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:14,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:14,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:14,686 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:14,688 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:15,457 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:15,811 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:15,811 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:17:15,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:15 BoogieIcfgContainer [2023-11-19 05:17:15,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:15,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:15,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:15,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:15,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:13" (1/3) ... [2023-11-19 05:17:15,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433ed686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:15, skipping insertion in model container [2023-11-19 05:17:15,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:14" (2/3) ... [2023-11-19 05:17:15,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433ed686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:15, skipping insertion in model container [2023-11-19 05:17:15,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:15" (3/3) ... [2023-11-19 05:17:15,837 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-19 05:17:15,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:15,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:17:15,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:15,937 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;@75b23e62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:15,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:17:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 84 states have (on average 1.7738095238095237) internal successors, (149), 91 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:15,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 05:17:15,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:15,956 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] [2023-11-19 05:17:15,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:15,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash -659543811, now seen corresponding path program 1 times [2023-11-19 05:17:15,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:15,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011889492] [2023-11-19 05:17:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:15,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:16,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011889492] [2023-11-19 05:17:16,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011889492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:16,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:16,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514502665] [2023-11-19 05:17:16,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:16,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:16,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:16,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:16,553 INFO L87 Difference]: Start difference. First operand has 92 states, 84 states have (on average 1.7738095238095237) internal successors, (149), 91 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:16,698 INFO L93 Difference]: Finished difference Result 206 states and 314 transitions. [2023-11-19 05:17:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:16,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-19 05:17:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:16,712 INFO L225 Difference]: With dead ends: 206 [2023-11-19 05:17:16,713 INFO L226 Difference]: Without dead ends: 127 [2023-11-19 05:17:16,716 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 [2023-11-19 05:17:16,721 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 92 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:16,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 321 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-19 05:17:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2023-11-19 05:17:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4193548387096775) internal successors, (176), 124 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 176 transitions. [2023-11-19 05:17:16,772 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 176 transitions. Word has length 37 [2023-11-19 05:17:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:16,773 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 176 transitions. [2023-11-19 05:17:16,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:16,774 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 176 transitions. [2023-11-19 05:17:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 05:17:16,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:16,776 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] [2023-11-19 05:17:16,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:17:16,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:16,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 945169834, now seen corresponding path program 1 times [2023-11-19 05:17:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:16,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597134458] [2023-11-19 05:17:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:17,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:17,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597134458] [2023-11-19 05:17:17,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597134458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:17,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:17,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163687262] [2023-11-19 05:17:17,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:17,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:17,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:17,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:17,042 INFO L87 Difference]: Start difference. First operand 125 states and 176 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:17,107 INFO L93 Difference]: Finished difference Result 276 states and 407 transitions. [2023-11-19 05:17:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:17,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-19 05:17:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:17,111 INFO L225 Difference]: With dead ends: 276 [2023-11-19 05:17:17,111 INFO L226 Difference]: Without dead ends: 180 [2023-11-19 05:17:17,112 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 [2023-11-19 05:17:17,114 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 77 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:17,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 182 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-19 05:17:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2023-11-19 05:17:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.4406779661016949) internal successors, (255), 177 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 255 transitions. [2023-11-19 05:17:17,132 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 255 transitions. Word has length 39 [2023-11-19 05:17:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:17,133 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 255 transitions. [2023-11-19 05:17:17,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 255 transitions. [2023-11-19 05:17:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 05:17:17,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:17,136 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] [2023-11-19 05:17:17,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:17:17,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:17,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:17,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1195104745, now seen corresponding path program 1 times [2023-11-19 05:17:17,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:17,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596402205] [2023-11-19 05:17:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:17,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:17,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:17,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596402205] [2023-11-19 05:17:17,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596402205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:17,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:17,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:17,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619602101] [2023-11-19 05:17:17,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:17,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:17,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:17,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:17,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:17,246 INFO L87 Difference]: Start difference. First operand 178 states and 255 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:17,289 INFO L93 Difference]: Finished difference Result 438 states and 648 transitions. [2023-11-19 05:17:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:17,290 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-19 05:17:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:17,293 INFO L225 Difference]: With dead ends: 438 [2023-11-19 05:17:17,293 INFO L226 Difference]: Without dead ends: 290 [2023-11-19 05:17:17,295 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 [2023-11-19 05:17:17,297 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 77 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:17,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 231 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:17:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-19 05:17:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 288. [2023-11-19 05:17:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.4599303135888502) internal successors, (419), 287 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 419 transitions. [2023-11-19 05:17:17,322 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 419 transitions. Word has length 41 [2023-11-19 05:17:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:17,323 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 419 transitions. [2023-11-19 05:17:17,323 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 419 transitions. [2023-11-19 05:17:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:17:17,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:17,325 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] [2023-11-19 05:17:17,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:17:17,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:17,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1292991726, now seen corresponding path program 1 times [2023-11-19 05:17:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:17,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73431874] [2023-11-19 05:17:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:17,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:17,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73431874] [2023-11-19 05:17:17,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73431874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:17,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:17,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435210619] [2023-11-19 05:17:17,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:17,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:17,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:17,440 INFO L87 Difference]: Start difference. First operand 288 states and 419 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:17,478 INFO L93 Difference]: Finished difference Result 707 states and 1052 transitions. [2023-11-19 05:17:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:17,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-19 05:17:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:17,484 INFO L225 Difference]: With dead ends: 707 [2023-11-19 05:17:17,484 INFO L226 Difference]: Without dead ends: 449 [2023-11-19 05:17:17,486 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 [2023-11-19 05:17:17,488 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 76 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:17,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 199 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:17:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-19 05:17:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2023-11-19 05:17:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.4775784753363228) internal successors, (659), 446 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 659 transitions. [2023-11-19 05:17:17,513 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 659 transitions. Word has length 43 [2023-11-19 05:17:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:17,514 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 659 transitions. [2023-11-19 05:17:17,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 659 transitions. [2023-11-19 05:17:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:17:17,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:17,516 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] [2023-11-19 05:17:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:17:17,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:17,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1337572037, now seen corresponding path program 1 times [2023-11-19 05:17:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:17,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692416249] [2023-11-19 05:17:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:17,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692416249] [2023-11-19 05:17:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692416249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:17,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:17,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317773726] [2023-11-19 05:17:17,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:17,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:17,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:17,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:17,607 INFO L87 Difference]: Start difference. First operand 447 states and 659 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:17,647 INFO L93 Difference]: Finished difference Result 1147 states and 1708 transitions. [2023-11-19 05:17:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-19 05:17:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:17,652 INFO L225 Difference]: With dead ends: 1147 [2023-11-19 05:17:17,652 INFO L226 Difference]: Without dead ends: 743 [2023-11-19 05:17:17,653 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 [2023-11-19 05:17:17,655 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 72 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:17,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 212 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:17:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2023-11-19 05:17:17,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 741. [2023-11-19 05:17:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.4702702702702704) internal successors, (1088), 740 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1088 transitions. [2023-11-19 05:17:17,682 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1088 transitions. Word has length 45 [2023-11-19 05:17:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:17,683 INFO L495 AbstractCegarLoop]: Abstraction has 741 states and 1088 transitions. [2023-11-19 05:17:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1088 transitions. [2023-11-19 05:17:17,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:17:17,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:17,685 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] [2023-11-19 05:17:17,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:17:17,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:17,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2011857746, now seen corresponding path program 1 times [2023-11-19 05:17:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236952994] [2023-11-19 05:17:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:17,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:17,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236952994] [2023-11-19 05:17:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236952994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:17,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:17,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923942102] [2023-11-19 05:17:17,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:17,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:17,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:17,854 INFO L87 Difference]: Start difference. First operand 741 states and 1088 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:17,901 INFO L93 Difference]: Finished difference Result 1856 states and 2756 transitions. [2023-11-19 05:17:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-19 05:17:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:17,916 INFO L225 Difference]: With dead ends: 1856 [2023-11-19 05:17:17,917 INFO L226 Difference]: Without dead ends: 1158 [2023-11-19 05:17:17,918 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 [2023-11-19 05:17:17,921 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 71 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:17,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 201 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:17:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2023-11-19 05:17:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1156. [2023-11-19 05:17:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.4779220779220779) internal successors, (1707), 1155 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1707 transitions. [2023-11-19 05:17:17,977 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1707 transitions. Word has length 47 [2023-11-19 05:17:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:17,978 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1707 transitions. [2023-11-19 05:17:17,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1707 transitions. [2023-11-19 05:17:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:17:17,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:17,985 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] [2023-11-19 05:17:17,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:17:17,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:17,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1493261569, now seen corresponding path program 1 times [2023-11-19 05:17:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472646719] [2023-11-19 05:17:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:18,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:18,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472646719] [2023-11-19 05:17:18,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472646719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:18,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:18,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:17:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705195491] [2023-11-19 05:17:18,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:18,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:17:18,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:17:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:18,173 INFO L87 Difference]: Start difference. First operand 1156 states and 1707 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:18,382 INFO L93 Difference]: Finished difference Result 2931 states and 4360 transitions. [2023-11-19 05:17:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:17:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-19 05:17:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:18,395 INFO L225 Difference]: With dead ends: 2931 [2023-11-19 05:17:18,395 INFO L226 Difference]: Without dead ends: 1813 [2023-11-19 05:17:18,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:18,400 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 435 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:18,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 801 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2023-11-19 05:17:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1787. [2023-11-19 05:17:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 1.4871220604703248) internal successors, (2656), 1786 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2656 transitions. [2023-11-19 05:17:18,451 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2656 transitions. Word has length 49 [2023-11-19 05:17:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:18,454 INFO L495 AbstractCegarLoop]: Abstraction has 1787 states and 2656 transitions. [2023-11-19 05:17:18,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2656 transitions. [2023-11-19 05:17:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 05:17:18,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:18,456 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] [2023-11-19 05:17:18,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:17:18,457 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:18,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash 891027429, now seen corresponding path program 1 times [2023-11-19 05:17:18,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:18,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801795486] [2023-11-19 05:17:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:18,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:18,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801795486] [2023-11-19 05:17:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801795486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:18,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:18,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:18,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919292104] [2023-11-19 05:17:18,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:18,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:18,574 INFO L87 Difference]: Start difference. First operand 1787 states and 2656 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:18,679 INFO L93 Difference]: Finished difference Result 3520 states and 5245 transitions. [2023-11-19 05:17:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:17:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-19 05:17:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:18,690 INFO L225 Difference]: With dead ends: 3520 [2023-11-19 05:17:18,690 INFO L226 Difference]: Without dead ends: 1789 [2023-11-19 05:17:18,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:18,694 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 144 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:18,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 294 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:17:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2023-11-19 05:17:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1784. [2023-11-19 05:17:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.481211441390914) internal successors, (2641), 1783 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2641 transitions. [2023-11-19 05:17:18,752 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2641 transitions. Word has length 50 [2023-11-19 05:17:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:18,753 INFO L495 AbstractCegarLoop]: Abstraction has 1784 states and 2641 transitions. [2023-11-19 05:17:18,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2641 transitions. [2023-11-19 05:17:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 05:17:18,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:18,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:18,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:17:18,756 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:18,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash 844610586, now seen corresponding path program 1 times [2023-11-19 05:17:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219391716] [2023-11-19 05:17:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:18,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:19,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:19,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219391716] [2023-11-19 05:17:19,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219391716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:19,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:19,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:17:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929131511] [2023-11-19 05:17:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:19,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:17:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:17:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:19,155 INFO L87 Difference]: Start difference. First operand 1784 states and 2641 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:19,246 INFO L93 Difference]: Finished difference Result 2952 states and 4316 transitions. [2023-11-19 05:17:19,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:19,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-19 05:17:19,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:19,263 INFO L225 Difference]: With dead ends: 2952 [2023-11-19 05:17:19,263 INFO L226 Difference]: Without dead ends: 2950 [2023-11-19 05:17:19,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:19,265 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 146 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:19,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 572 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2023-11-19 05:17:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 1828. [2023-11-19 05:17:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 1.4570333880678707) internal successors, (2662), 1827 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2662 transitions. [2023-11-19 05:17:19,320 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2662 transitions. Word has length 58 [2023-11-19 05:17:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:19,321 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 2662 transitions. [2023-11-19 05:17:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2662 transitions. [2023-11-19 05:17:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:17:19,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:19,322 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] [2023-11-19 05:17:19,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:17:19,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:19,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1084083237, now seen corresponding path program 1 times [2023-11-19 05:17:19,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:19,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531804048] [2023-11-19 05:17:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:20,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:20,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531804048] [2023-11-19 05:17:20,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531804048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:20,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080938012] [2023-11-19 05:17:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:20,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:20,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:20,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:17:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:20,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 05:17:20,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:17:22,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:22,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080938012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:22,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:22,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2023-11-19 05:17:22,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353822596] [2023-11-19 05:17:22,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:22,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:17:22,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:17:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:17:22,028 INFO L87 Difference]: Start difference. First operand 1828 states and 2662 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:22,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:22,260 INFO L93 Difference]: Finished difference Result 5634 states and 8177 transitions. [2023-11-19 05:17:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:17:22,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-19 05:17:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:22,281 INFO L225 Difference]: With dead ends: 5634 [2023-11-19 05:17:22,281 INFO L226 Difference]: Without dead ends: 3862 [2023-11-19 05:17:22,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-19 05:17:22,285 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 595 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:22,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 321 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:22,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2023-11-19 05:17:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3727. [2023-11-19 05:17:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 1.440955448201825) internal successors, (5369), 3726 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5369 transitions. [2023-11-19 05:17:22,386 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5369 transitions. Word has length 65 [2023-11-19 05:17:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:22,387 INFO L495 AbstractCegarLoop]: Abstraction has 3727 states and 5369 transitions. [2023-11-19 05:17:22,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5369 transitions. [2023-11-19 05:17:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:17:22,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:22,389 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, 1, 1] [2023-11-19 05:17:22,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:17:22,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:22,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash -786297291, now seen corresponding path program 1 times [2023-11-19 05:17:22,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:22,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531821687] [2023-11-19 05:17:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:22,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:23,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:23,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531821687] [2023-11-19 05:17:23,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531821687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:23,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170223423] [2023-11-19 05:17:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:23,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:23,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:23,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:23,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:17:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:23,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 05:17:23,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:17:25,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:25,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170223423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:25,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:25,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-11-19 05:17:25,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549378180] [2023-11-19 05:17:25,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:25,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:17:25,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:25,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:17:25,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:17:25,077 INFO L87 Difference]: Start difference. First operand 3727 states and 5369 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:25,654 INFO L93 Difference]: Finished difference Result 7526 states and 10832 transitions. [2023-11-19 05:17:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:17:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-19 05:17:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:25,675 INFO L225 Difference]: With dead ends: 7526 [2023-11-19 05:17:25,675 INFO L226 Difference]: Without dead ends: 3875 [2023-11-19 05:17:25,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:17:25,681 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 640 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:25,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 713 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:25,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2023-11-19 05:17:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 3828. [2023-11-19 05:17:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 1.4384635484713875) internal successors, (5505), 3827 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 5505 transitions. [2023-11-19 05:17:25,787 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 5505 transitions. Word has length 68 [2023-11-19 05:17:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:25,787 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 5505 transitions. [2023-11-19 05:17:25,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 5505 transitions. [2023-11-19 05:17:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 05:17:25,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:25,791 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, 1, 1, 1, 1, 1] [2023-11-19 05:17:25,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:17:26,004 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:26,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash 651014349, now seen corresponding path program 1 times [2023-11-19 05:17:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885350041] [2023-11-19 05:17:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:26,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885350041] [2023-11-19 05:17:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885350041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624947985] [2023-11-19 05:17:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:26,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:26,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:26,957 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:26,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:17:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:27,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 05:17:27,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:17:27,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:27,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624947985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:27,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:27,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-19 05:17:27,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637438459] [2023-11-19 05:17:27,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:27,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:27,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:17:27,610 INFO L87 Difference]: Start difference. First operand 3828 states and 5505 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:27,831 INFO L93 Difference]: Finished difference Result 12384 states and 17705 transitions. [2023-11-19 05:17:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-19 05:17:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:27,902 INFO L225 Difference]: With dead ends: 12384 [2023-11-19 05:17:27,902 INFO L226 Difference]: Without dead ends: 8638 [2023-11-19 05:17:27,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:17:27,909 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 382 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:27,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 355 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8638 states. [2023-11-19 05:17:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8638 to 7558. [2023-11-19 05:17:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7558 states, 7557 states have (on average 1.426359666534339) internal successors, (10779), 7557 states have internal predecessors, (10779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7558 states to 7558 states and 10779 transitions. [2023-11-19 05:17:28,137 INFO L78 Accepts]: Start accepts. Automaton has 7558 states and 10779 transitions. Word has length 71 [2023-11-19 05:17:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:28,138 INFO L495 AbstractCegarLoop]: Abstraction has 7558 states and 10779 transitions. [2023-11-19 05:17:28,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7558 states and 10779 transitions. [2023-11-19 05:17:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 05:17:28,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:28,142 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:28,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:28,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:17:28,356 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:28,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:28,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1260433940, now seen corresponding path program 1 times [2023-11-19 05:17:28,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:28,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174730491] [2023-11-19 05:17:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:17:28,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:28,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174730491] [2023-11-19 05:17:28,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174730491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:28,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:28,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782430078] [2023-11-19 05:17:28,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:28,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:17:28,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:28,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:17:28,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:28,517 INFO L87 Difference]: Start difference. First operand 7558 states and 10779 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:28,739 INFO L93 Difference]: Finished difference Result 15069 states and 21502 transitions. [2023-11-19 05:17:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:17:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-19 05:17:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:28,755 INFO L225 Difference]: With dead ends: 15069 [2023-11-19 05:17:28,755 INFO L226 Difference]: Without dead ends: 7558 [2023-11-19 05:17:28,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:28,764 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 279 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:28,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 98 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7558 states. [2023-11-19 05:17:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7558 to 7558. [2023-11-19 05:17:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7558 states, 7557 states have (on average 1.3923514622204578) internal successors, (10522), 7557 states have internal predecessors, (10522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7558 states to 7558 states and 10522 transitions. [2023-11-19 05:17:28,937 INFO L78 Accepts]: Start accepts. Automaton has 7558 states and 10522 transitions. Word has length 74 [2023-11-19 05:17:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:28,938 INFO L495 AbstractCegarLoop]: Abstraction has 7558 states and 10522 transitions. [2023-11-19 05:17:28,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 7558 states and 10522 transitions. [2023-11-19 05:17:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 05:17:28,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:28,941 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:28,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:17:28,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:28,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -674392089, now seen corresponding path program 1 times [2023-11-19 05:17:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:28,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925593671] [2023-11-19 05:17:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:28,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:29,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925593671] [2023-11-19 05:17:29,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925593671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:29,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111043937] [2023-11-19 05:17:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:29,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:29,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:29,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:17:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:30,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 05:17:30,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:17:30,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111043937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:30,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-19 05:17:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081998171] [2023-11-19 05:17:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:17:30,625 INFO L87 Difference]: Start difference. First operand 7558 states and 10522 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:30,796 INFO L93 Difference]: Finished difference Result 12838 states and 17943 transitions. [2023-11-19 05:17:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2023-11-19 05:17:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:30,808 INFO L225 Difference]: With dead ends: 12838 [2023-11-19 05:17:30,809 INFO L226 Difference]: Without dead ends: 5406 [2023-11-19 05:17:30,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-19 05:17:30,819 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 357 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:30,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 304 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5406 states. [2023-11-19 05:17:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5406 to 4230. [2023-11-19 05:17:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4230 states, 4229 states have (on average 1.4071884606289904) internal successors, (5951), 4229 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4230 states to 4230 states and 5951 transitions. [2023-11-19 05:17:30,948 INFO L78 Accepts]: Start accepts. Automaton has 4230 states and 5951 transitions. Word has length 74 [2023-11-19 05:17:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:30,948 INFO L495 AbstractCegarLoop]: Abstraction has 4230 states and 5951 transitions. [2023-11-19 05:17:30,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:17:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4230 states and 5951 transitions. [2023-11-19 05:17:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 05:17:30,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:30,951 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:30,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:31,165 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:31,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2038494249, now seen corresponding path program 1 times [2023-11-19 05:17:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:31,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861580227] [2023-11-19 05:17:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:17:32,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861580227] [2023-11-19 05:17:32,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861580227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:32,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4601566] [2023-11-19 05:17:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:32,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:32,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:32,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce2b3648-bf1b-45bd-906d-eea6bb1c11f4/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:17:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:32,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 05:17:32,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:33,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:17:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:38,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4601566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:17:38,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663504337] [2023-11-19 05:17:38,106 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2023-11-19 05:17:38,106 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:17:38,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:17:38,116 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:17:38,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:17:56,456 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12