./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4ea09104fdfc6025836c8ea5917b899069d556f85aa19eff5395187d58ecb3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:20,021 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:20,115 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:01:20,121 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:20,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:20,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:20,150 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:20,150 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:20,151 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:20,152 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:20,152 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:20,153 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:20,154 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:20,155 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:20,155 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:20,156 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:20,156 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:20,157 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:20,158 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:20,158 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:20,159 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:20,160 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:20,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:20,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:20,162 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:01:20,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:20,163 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:01:20,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:20,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:20,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:20,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:20,166 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:01:20,166 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:20,167 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:20,167 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:20,168 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:20,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:20,169 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:20,169 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:20,169 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:20,170 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:20,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:20,171 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:20,171 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:20,171 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:20,171 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_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4ea09104fdfc6025836c8ea5917b899069d556f85aa19eff5395187d58ecb3d [2023-11-12 01:01:20,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:20,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:20,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:20,469 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:20,469 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:20,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-12 01:01:23,768 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:01:24,038 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:01:24,038 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-12 01:01:24,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/data/79763e9d8/d429ff18ca354c64accbabd6a1c29e54/FLAG8f50ba562 [2023-11-12 01:01:24,068 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/data/79763e9d8/d429ff18ca354c64accbabd6a1c29e54 [2023-11-12 01:01:24,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:01:24,073 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:01:24,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:24,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:01:24,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:01:24,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b68ee62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24, skipping insertion in model container [2023-11-12 01:01:24,096 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,157 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:01:24,401 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_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2023-11-12 01:01:24,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:24,491 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:01:24,578 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_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[8640,8653] [2023-11-12 01:01:24,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:24,630 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:01:24,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24 WrapperNode [2023-11-12 01:01:24,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:24,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:24,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:01:24,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:01:24,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,699 INFO L138 Inliner]: procedures = 28, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 708 [2023-11-12 01:01:24,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:24,701 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:01:24,701 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:01:24,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:01:24,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,720 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:01:24,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:01:24,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:01:24,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:01:24,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (1/1) ... [2023-11-12 01:01:24,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:24,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:24,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:01:24,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8ec41f8-aec6-4a74-9060-4ccb669d2f98/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:01:24,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:01:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:01:24,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:01:24,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:01:25,062 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:25,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:25,815 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:25,987 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:25,987 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 01:01:25,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:25 BoogieIcfgContainer [2023-11-12 01:01:25,991 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:25,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:25,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:25,996 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:25,997 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:01:24" (1/3) ... [2023-11-12 01:01:25,997 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ac9f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:25, skipping insertion in model container [2023-11-12 01:01:25,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:24" (2/3) ... [2023-11-12 01:01:25,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79ac9f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:25, skipping insertion in model container [2023-11-12 01:01:25,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:25" (3/3) ... [2023-11-12 01:01:26,000 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-12 01:01:26,020 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:26,020 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:01:26,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:26,081 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;@6aa0f25c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:26,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:01:26,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 122 states have internal predecessors, (212), 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) [2023-11-12 01:01:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-12 01:01:26,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:26,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:26,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:26,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash 662210636, now seen corresponding path program 1 times [2023-11-12 01:01:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:26,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922279349] [2023-11-12 01:01:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:26,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:26,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:26,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922279349] [2023-11-12 01:01:26,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922279349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:26,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:26,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:26,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130063527] [2023-11-12 01:01:26,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:26,741 INFO L87 Difference]: Start difference. First operand has 123 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 122 states have internal predecessors, (212), 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 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-12 01:01:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:26,892 INFO L93 Difference]: Finished difference Result 239 states and 380 transitions. [2023-11-12 01:01:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2023-11-12 01:01:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:26,911 INFO L225 Difference]: With dead ends: 239 [2023-11-12 01:01:26,911 INFO L226 Difference]: Without dead ends: 173 [2023-11-12 01:01:26,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:26,919 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 140 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 344 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 [2023-11-12 01:01:26,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 344 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-12 01:01:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-11-12 01:01:26,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.311764705882353) internal successors, (223), 170 states have internal predecessors, (223), 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) [2023-11-12 01:01:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2023-11-12 01:01:26,987 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 84 [2023-11-12 01:01:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:26,988 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2023-11-12 01:01:26,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-12 01:01:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2023-11-12 01:01:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 01:01:26,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:26,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:26,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:01:26,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:26,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:26,994 INFO L85 PathProgramCache]: Analyzing trace with hash 708547091, now seen corresponding path program 1 times [2023-11-12 01:01:26,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:26,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533509607] [2023-11-12 01:01:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:26,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:27,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:27,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533509607] [2023-11-12 01:01:27,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533509607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:27,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:27,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:27,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696117189] [2023-11-12 01:01:27,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:27,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:27,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:27,236 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2023-11-12 01:01:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:27,319 INFO L93 Difference]: Finished difference Result 379 states and 531 transitions. [2023-11-12 01:01:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2023-11-12 01:01:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:27,326 INFO L225 Difference]: With dead ends: 379 [2023-11-12 01:01:27,326 INFO L226 Difference]: Without dead ends: 271 [2023-11-12 01:01:27,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:27,335 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 76 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:27,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 274 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-12 01:01:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 269. [2023-11-12 01:01:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.373134328358209) internal successors, (368), 268 states have internal predecessors, (368), 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) [2023-11-12 01:01:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 368 transitions. [2023-11-12 01:01:27,362 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 368 transitions. Word has length 87 [2023-11-12 01:01:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:27,362 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 368 transitions. [2023-11-12 01:01:27,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2023-11-12 01:01:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 368 transitions. [2023-11-12 01:01:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-12 01:01:27,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:27,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:01:27,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:27,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1551016251, now seen corresponding path program 1 times [2023-11-12 01:01:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801514715] [2023-11-12 01:01:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:27,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:27,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:27,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801514715] [2023-11-12 01:01:27,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801514715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:27,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:27,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349480194] [2023-11-12 01:01:27,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:27,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:27,604 INFO L87 Difference]: Start difference. First operand 269 states and 368 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-12 01:01:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:27,668 INFO L93 Difference]: Finished difference Result 665 states and 954 transitions. [2023-11-12 01:01:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 90 [2023-11-12 01:01:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:27,674 INFO L225 Difference]: With dead ends: 665 [2023-11-12 01:01:27,674 INFO L226 Difference]: Without dead ends: 459 [2023-11-12 01:01:27,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:27,688 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 71 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:27,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 270 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-11-12 01:01:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2023-11-12 01:01:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.412280701754386) internal successors, (644), 456 states have internal predecessors, (644), 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) [2023-11-12 01:01:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 644 transitions. [2023-11-12 01:01:27,770 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 644 transitions. Word has length 90 [2023-11-12 01:01:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:27,771 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 644 transitions. [2023-11-12 01:01:27,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2023-11-12 01:01:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 644 transitions. [2023-11-12 01:01:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 01:01:27,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:27,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:27,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:01:27,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:27,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1011945191, now seen corresponding path program 1 times [2023-11-12 01:01:27,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:27,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716269920] [2023-11-12 01:01:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:27,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:27,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:27,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716269920] [2023-11-12 01:01:27,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716269920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:27,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:27,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162002404] [2023-11-12 01:01:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:27,952 INFO L87 Difference]: Start difference. First operand 457 states and 644 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2023-11-12 01:01:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:28,011 INFO L93 Difference]: Finished difference Result 1213 states and 1758 transitions. [2023-11-12 01:01:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:28,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 93 [2023-11-12 01:01:28,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:28,018 INFO L225 Difference]: With dead ends: 1213 [2023-11-12 01:01:28,018 INFO L226 Difference]: Without dead ends: 819 [2023-11-12 01:01:28,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:28,028 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 66 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:28,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 266 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2023-11-12 01:01:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 817. [2023-11-12 01:01:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 1.4313725490196079) internal successors, (1168), 816 states have internal predecessors, (1168), 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) [2023-11-12 01:01:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1168 transitions. [2023-11-12 01:01:28,061 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1168 transitions. Word has length 93 [2023-11-12 01:01:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:28,063 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1168 transitions. [2023-11-12 01:01:28,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2023-11-12 01:01:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1168 transitions. [2023-11-12 01:01:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-12 01:01:28,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:28,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:28,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:01:28,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:28,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash 960530668, now seen corresponding path program 1 times [2023-11-12 01:01:28,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:28,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345491978] [2023-11-12 01:01:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:28,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:28,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345491978] [2023-11-12 01:01:28,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345491978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:28,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:28,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580134293] [2023-11-12 01:01:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:28,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:28,246 INFO L87 Difference]: Start difference. First operand 817 states and 1168 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2023-11-12 01:01:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:28,315 INFO L93 Difference]: Finished difference Result 2261 states and 3282 transitions. [2023-11-12 01:01:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2023-11-12 01:01:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:28,325 INFO L225 Difference]: With dead ends: 2261 [2023-11-12 01:01:28,325 INFO L226 Difference]: Without dead ends: 1507 [2023-11-12 01:01:28,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:28,327 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 61 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:28,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 262 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2023-11-12 01:01:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1505. [2023-11-12 01:01:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.4361702127659575) internal successors, (2160), 1504 states have internal predecessors, (2160), 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) [2023-11-12 01:01:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2160 transitions. [2023-11-12 01:01:28,374 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2160 transitions. Word has length 96 [2023-11-12 01:01:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:28,375 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2160 transitions. [2023-11-12 01:01:28,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2023-11-12 01:01:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2160 transitions. [2023-11-12 01:01:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 01:01:28,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:28,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:28,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:01:28,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:28,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash 467482554, now seen corresponding path program 1 times [2023-11-12 01:01:28,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:28,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973941217] [2023-11-12 01:01:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:28,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:28,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:28,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973941217] [2023-11-12 01:01:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973941217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:28,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739099360] [2023-11-12 01:01:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:28,538 INFO L87 Difference]: Start difference. First operand 1505 states and 2160 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2023-11-12 01:01:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:28,613 INFO L93 Difference]: Finished difference Result 4261 states and 6162 transitions. [2023-11-12 01:01:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 99 [2023-11-12 01:01:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:28,630 INFO L225 Difference]: With dead ends: 4261 [2023-11-12 01:01:28,630 INFO L226 Difference]: Without dead ends: 2819 [2023-11-12 01:01:28,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:28,633 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 56 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:28,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 258 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2023-11-12 01:01:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2817. [2023-11-12 01:01:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 1.4318181818181819) internal successors, (4032), 2816 states have internal predecessors, (4032), 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) [2023-11-12 01:01:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 4032 transitions. [2023-11-12 01:01:28,731 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 4032 transitions. Word has length 99 [2023-11-12 01:01:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:28,731 INFO L495 AbstractCegarLoop]: Abstraction has 2817 states and 4032 transitions. [2023-11-12 01:01:28,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2023-11-12 01:01:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 4032 transitions. [2023-11-12 01:01:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 01:01:28,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:28,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:28,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:01:28,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:28,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash 680669897, now seen corresponding path program 1 times [2023-11-12 01:01:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:28,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621125471] [2023-11-12 01:01:28,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:28,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621125471] [2023-11-12 01:01:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621125471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:28,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:28,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929454318] [2023-11-12 01:01:28,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:28,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:28,842 INFO L87 Difference]: Start difference. First operand 2817 states and 4032 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2023-11-12 01:01:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:28,936 INFO L93 Difference]: Finished difference Result 8069 states and 11586 transitions. [2023-11-12 01:01:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 102 [2023-11-12 01:01:28,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:28,964 INFO L225 Difference]: With dead ends: 8069 [2023-11-12 01:01:28,964 INFO L226 Difference]: Without dead ends: 5315 [2023-11-12 01:01:28,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:28,969 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 51 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:28,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 254 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2023-11-12 01:01:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5313. [2023-11-12 01:01:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5312 states have (on average 1.4216867469879517) internal successors, (7552), 5312 states have internal predecessors, (7552), 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) [2023-11-12 01:01:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 7552 transitions. [2023-11-12 01:01:29,128 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 7552 transitions. Word has length 102 [2023-11-12 01:01:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:29,128 INFO L495 AbstractCegarLoop]: Abstraction has 5313 states and 7552 transitions. [2023-11-12 01:01:29,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2023-11-12 01:01:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 7552 transitions. [2023-11-12 01:01:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-12 01:01:29,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:29,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:29,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:01:29,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:29,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:29,132 INFO L85 PathProgramCache]: Analyzing trace with hash -649240331, now seen corresponding path program 1 times [2023-11-12 01:01:29,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:29,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639948003] [2023-11-12 01:01:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:29,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:29,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639948003] [2023-11-12 01:01:29,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639948003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:29,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:29,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:29,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984373197] [2023-11-12 01:01:29,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:29,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:29,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:29,275 INFO L87 Difference]: Start difference. First operand 5313 states and 7552 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-11-12 01:01:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:29,392 INFO L93 Difference]: Finished difference Result 15301 states and 21762 transitions. [2023-11-12 01:01:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:29,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 105 [2023-11-12 01:01:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:29,441 INFO L225 Difference]: With dead ends: 15301 [2023-11-12 01:01:29,442 INFO L226 Difference]: Without dead ends: 10051 [2023-11-12 01:01:29,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:29,450 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 46 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:29,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 250 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10051 states. [2023-11-12 01:01:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10051 to 10049. [2023-11-12 01:01:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10049 states, 10048 states have (on average 1.4076433121019107) internal successors, (14144), 10048 states have internal predecessors, (14144), 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) [2023-11-12 01:01:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10049 states to 10049 states and 14144 transitions. [2023-11-12 01:01:29,722 INFO L78 Accepts]: Start accepts. Automaton has 10049 states and 14144 transitions. Word has length 105 [2023-11-12 01:01:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:29,723 INFO L495 AbstractCegarLoop]: Abstraction has 10049 states and 14144 transitions. [2023-11-12 01:01:29,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-11-12 01:01:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 10049 states and 14144 transitions. [2023-11-12 01:01:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-12 01:01:29,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:29,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:01:29,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:29,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash 904443890, now seen corresponding path program 1 times [2023-11-12 01:01:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124235973] [2023-11-12 01:01:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:29,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:30,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:30,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124235973] [2023-11-12 01:01:30,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124235973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:30,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:30,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 01:01:30,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814571013] [2023-11-12 01:01:30,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:30,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 01:01:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 01:01:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:01:30,163 INFO L87 Difference]: Start difference. First operand 10049 states and 14144 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 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) [2023-11-12 01:01:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:31,320 INFO L93 Difference]: Finished difference Result 39539 states and 56053 transitions. [2023-11-12 01:01:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 01:01:31,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 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 108 [2023-11-12 01:01:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:31,421 INFO L225 Difference]: With dead ends: 39539 [2023-11-12 01:01:31,421 INFO L226 Difference]: Without dead ends: 29553 [2023-11-12 01:01:31,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2023-11-12 01:01:31,441 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1473 mSDsluCounter, 4708 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 4843 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:31,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1473 Valid, 4843 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29553 states. [2023-11-12 01:01:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29553 to 12861. [2023-11-12 01:01:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12861 states, 12860 states have (on average 1.3980559875583203) internal successors, (17979), 12860 states have internal predecessors, (17979), 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) [2023-11-12 01:01:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 17979 transitions. [2023-11-12 01:01:32,020 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 17979 transitions. Word has length 108 [2023-11-12 01:01:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:32,021 INFO L495 AbstractCegarLoop]: Abstraction has 12861 states and 17979 transitions. [2023-11-12 01:01:32,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 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) [2023-11-12 01:01:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 17979 transitions. [2023-11-12 01:01:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 01:01:32,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:32,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:32,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 01:01:32,024 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:32,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:32,025 INFO L85 PathProgramCache]: Analyzing trace with hash 665367790, now seen corresponding path program 1 times [2023-11-12 01:01:32,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:32,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582357946] [2023-11-12 01:01:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:32,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:32,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582357946] [2023-11-12 01:01:32,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582357946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:32,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:32,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:32,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667697288] [2023-11-12 01:01:32,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:32,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:32,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:32,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:32,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:32,167 INFO L87 Difference]: Start difference. First operand 12861 states and 17979 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-11-12 01:01:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:32,364 INFO L93 Difference]: Finished difference Result 32955 states and 46325 transitions. [2023-11-12 01:01:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2023-11-12 01:01:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:32,402 INFO L225 Difference]: With dead ends: 32955 [2023-11-12 01:01:32,402 INFO L226 Difference]: Without dead ends: 20157 [2023-11-12 01:01:32,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:32,420 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 40 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:32,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 210 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2023-11-12 01:01:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2023-11-12 01:01:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.4031457775131488) internal successors, (28279), 20154 states have internal predecessors, (28279), 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) [2023-11-12 01:01:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28279 transitions. [2023-11-12 01:01:32,841 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28279 transitions. Word has length 110 [2023-11-12 01:01:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:32,841 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 28279 transitions. [2023-11-12 01:01:32,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-11-12 01:01:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28279 transitions. [2023-11-12 01:01:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 01:01:32,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:32,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 01:01:32,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:32,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 686370445, now seen corresponding path program 1 times [2023-11-12 01:01:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890395271] [2023-11-12 01:01:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:33,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:33,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890395271] [2023-11-12 01:01:33,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890395271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:33,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:33,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 01:01:33,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390735563] [2023-11-12 01:01:33,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:33,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 01:01:33,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:33,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 01:01:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:01:33,617 INFO L87 Difference]: Start difference. First operand 20155 states and 28279 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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) [2023-11-12 01:01:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:34,496 INFO L93 Difference]: Finished difference Result 40247 states and 56494 transitions. [2023-11-12 01:01:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:01:34,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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 110 [2023-11-12 01:01:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:34,545 INFO L225 Difference]: With dead ends: 40247 [2023-11-12 01:01:34,546 INFO L226 Difference]: Without dead ends: 20157 [2023-11-12 01:01:34,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:01:34,574 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 146 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:34,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 723 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2023-11-12 01:01:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2023-11-12 01:01:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.4030465416294533) internal successors, (28277), 20154 states have internal predecessors, (28277), 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) [2023-11-12 01:01:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28277 transitions. [2023-11-12 01:01:35,167 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28277 transitions. Word has length 110 [2023-11-12 01:01:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:35,168 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 28277 transitions. [2023-11-12 01:01:35,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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) [2023-11-12 01:01:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28277 transitions. [2023-11-12 01:01:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:01:35,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:35,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:35,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 01:01:35,179 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:35,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:35,179 INFO L85 PathProgramCache]: Analyzing trace with hash -199261908, now seen corresponding path program 1 times [2023-11-12 01:01:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:35,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842209845] [2023-11-12 01:01:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:35,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:35,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842209845] [2023-11-12 01:01:35,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842209845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:35,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:35,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:35,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805505425] [2023-11-12 01:01:35,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:35,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:35,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:35,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:35,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:35,364 INFO L87 Difference]: Start difference. First operand 20155 states and 28277 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:35,733 INFO L93 Difference]: Finished difference Result 40245 states and 56489 transitions. [2023-11-12 01:01:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:35,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2023-11-12 01:01:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:35,777 INFO L225 Difference]: With dead ends: 40245 [2023-11-12 01:01:35,777 INFO L226 Difference]: Without dead ends: 20155 [2023-11-12 01:01:35,795 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 [2023-11-12 01:01:35,796 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 340 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:35,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 108 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2023-11-12 01:01:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2023-11-12 01:01:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3903443485164235) internal successors, (28021), 20154 states have internal predecessors, (28021), 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) [2023-11-12 01:01:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 28021 transitions. [2023-11-12 01:01:36,275 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 28021 transitions. Word has length 111 [2023-11-12 01:01:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:36,276 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 28021 transitions. [2023-11-12 01:01:36,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 28021 transitions. [2023-11-12 01:01:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:01:36,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:36,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:36,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 01:01:36,278 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:36,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:36,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1940679023, now seen corresponding path program 1 times [2023-11-12 01:01:36,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:36,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645637474] [2023-11-12 01:01:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:36,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:36,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:36,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645637474] [2023-11-12 01:01:36,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645637474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:36,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:36,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:36,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381201368] [2023-11-12 01:01:36,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:36,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:36,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:36,704 INFO L87 Difference]: Start difference. First operand 20155 states and 28021 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:37,024 INFO L93 Difference]: Finished difference Result 40247 states and 55978 transitions. [2023-11-12 01:01:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2023-11-12 01:01:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:37,066 INFO L225 Difference]: With dead ends: 40247 [2023-11-12 01:01:37,067 INFO L226 Difference]: Without dead ends: 20157 [2023-11-12 01:01:37,082 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 [2023-11-12 01:01:37,083 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 508 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:37,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 129 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:01:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2023-11-12 01:01:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20155. [2023-11-12 01:01:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.377642155403394) internal successors, (27765), 20154 states have internal predecessors, (27765), 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) [2023-11-12 01:01:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27765 transitions. [2023-11-12 01:01:37,574 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27765 transitions. Word has length 111 [2023-11-12 01:01:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:37,575 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27765 transitions. [2023-11-12 01:01:37,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27765 transitions. [2023-11-12 01:01:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:01:37,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:37,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:37,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 01:01:37,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:37,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash -194252362, now seen corresponding path program 1 times [2023-11-12 01:01:37,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:37,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231216069] [2023-11-12 01:01:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:37,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:37,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231216069] [2023-11-12 01:01:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231216069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:37,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:37,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210051123] [2023-11-12 01:01:37,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:37,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:37,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:37,759 INFO L87 Difference]: Start difference. First operand 20155 states and 27765 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:38,053 INFO L93 Difference]: Finished difference Result 40245 states and 55465 transitions. [2023-11-12 01:01:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2023-11-12 01:01:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:38,087 INFO L225 Difference]: With dead ends: 40245 [2023-11-12 01:01:38,087 INFO L226 Difference]: Without dead ends: 20155 [2023-11-12 01:01:38,098 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 [2023-11-12 01:01:38,107 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 298 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:38,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 132 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2023-11-12 01:01:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2023-11-12 01:01:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3677185670338394) internal successors, (27565), 20154 states have internal predecessors, (27565), 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) [2023-11-12 01:01:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27565 transitions. [2023-11-12 01:01:38,591 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27565 transitions. Word has length 111 [2023-11-12 01:01:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:38,592 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27565 transitions. [2023-11-12 01:01:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27565 transitions. [2023-11-12 01:01:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:01:38,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:38,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:38,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 01:01:38,594 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:38,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash -66167055, now seen corresponding path program 1 times [2023-11-12 01:01:38,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:38,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329693728] [2023-11-12 01:01:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:38,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:38,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:38,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329693728] [2023-11-12 01:01:38,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329693728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:38,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:38,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891950321] [2023-11-12 01:01:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:38,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:38,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:38,915 INFO L87 Difference]: Start difference. First operand 20155 states and 27565 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:39,111 INFO L93 Difference]: Finished difference Result 40245 states and 55065 transitions. [2023-11-12 01:01:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2023-11-12 01:01:39,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:39,150 INFO L225 Difference]: With dead ends: 40245 [2023-11-12 01:01:39,150 INFO L226 Difference]: Without dead ends: 20155 [2023-11-12 01:01:39,165 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 [2023-11-12 01:01:39,166 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 308 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:39,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 124 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2023-11-12 01:01:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2023-11-12 01:01:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3573980351295027) internal successors, (27357), 20154 states have internal predecessors, (27357), 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) [2023-11-12 01:01:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27357 transitions. [2023-11-12 01:01:39,582 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27357 transitions. Word has length 111 [2023-11-12 01:01:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:39,582 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27357 transitions. [2023-11-12 01:01:39,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27357 transitions. [2023-11-12 01:01:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:01:39,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:39,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:39,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 01:01:39,585 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:39,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash -829030762, now seen corresponding path program 1 times [2023-11-12 01:01:39,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:39,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799836925] [2023-11-12 01:01:39,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:39,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:39,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:39,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799836925] [2023-11-12 01:01:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799836925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:39,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743967281] [2023-11-12 01:01:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:39,848 INFO L87 Difference]: Start difference. First operand 20155 states and 27357 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:40,054 INFO L93 Difference]: Finished difference Result 40245 states and 54649 transitions. [2023-11-12 01:01:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2023-11-12 01:01:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:40,102 INFO L225 Difference]: With dead ends: 40245 [2023-11-12 01:01:40,102 INFO L226 Difference]: Without dead ends: 20155 [2023-11-12 01:01:40,116 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 [2023-11-12 01:01:40,117 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 279 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:40,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 140 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2023-11-12 01:01:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2023-11-12 01:01:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3476729185273395) internal successors, (27161), 20154 states have internal predecessors, (27161), 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) [2023-11-12 01:01:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 27161 transitions. [2023-11-12 01:01:40,603 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 27161 transitions. Word has length 111 [2023-11-12 01:01:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:40,604 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 27161 transitions. [2023-11-12 01:01:40,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 27161 transitions. [2023-11-12 01:01:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:01:40,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:40,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:40,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 01:01:40,606 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:40,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:40,607 INFO L85 PathProgramCache]: Analyzing trace with hash 36501627, now seen corresponding path program 1 times [2023-11-12 01:01:40,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:40,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369042779] [2023-11-12 01:01:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:40,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:40,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369042779] [2023-11-12 01:01:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369042779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:40,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:40,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:40,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719353996] [2023-11-12 01:01:40,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:40,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:40,808 INFO L87 Difference]: Start difference. First operand 20155 states and 27161 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:41,042 INFO L93 Difference]: Finished difference Result 40245 states and 54257 transitions. [2023-11-12 01:01:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:41,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2023-11-12 01:01:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:41,093 INFO L225 Difference]: With dead ends: 40245 [2023-11-12 01:01:41,093 INFO L226 Difference]: Without dead ends: 20155 [2023-11-12 01:01:41,109 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 [2023-11-12 01:01:41,110 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 263 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:41,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 148 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20155 states. [2023-11-12 01:01:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20155 to 20155. [2023-11-12 01:01:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20155 states, 20154 states have (on average 1.3380470378088718) internal successors, (26967), 20154 states have internal predecessors, (26967), 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) [2023-11-12 01:01:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20155 states to 20155 states and 26967 transitions. [2023-11-12 01:01:41,629 INFO L78 Accepts]: Start accepts. Automaton has 20155 states and 26967 transitions. Word has length 111 [2023-11-12 01:01:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:41,629 INFO L495 AbstractCegarLoop]: Abstraction has 20155 states and 26967 transitions. [2023-11-12 01:01:41,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-12 01:01:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 20155 states and 26967 transitions. [2023-11-12 01:01:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:01:41,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:41,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:41,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 01:01:41,631 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:41,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -492788874, now seen corresponding path program 1 times [2023-11-12 01:01:41,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:41,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430248775] [2023-11-12 01:01:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:41,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:41,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:41,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430248775] [2023-11-12 01:01:41,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430248775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:41,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:01:41,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105365339] [2023-11-12 01:01:41,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:41,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:41,953 INFO L87 Difference]: Start difference. First operand 20155 states and 26967 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2023-11-12 01:01:42,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:42,137 INFO L93 Difference]: Finished difference Result 34674 states and 45895 transitions. [2023-11-12 01:01:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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 111 [2023-11-12 01:01:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:42,206 INFO L225 Difference]: With dead ends: 34674 [2023-11-12 01:01:42,206 INFO L226 Difference]: Without dead ends: 34672 [2023-11-12 01:01:42,216 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 [2023-11-12 01:01:42,217 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 145 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:42,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 648 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34672 states. [2023-11-12 01:01:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34672 to 20667. [2023-11-12 01:01:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20667 states, 20666 states have (on average 1.3110906803445272) internal successors, (27095), 20666 states have internal predecessors, (27095), 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) [2023-11-12 01:01:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20667 states to 20667 states and 27095 transitions. [2023-11-12 01:01:42,875 INFO L78 Accepts]: Start accepts. Automaton has 20667 states and 27095 transitions. Word has length 111 [2023-11-12 01:01:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:42,875 INFO L495 AbstractCegarLoop]: Abstraction has 20667 states and 27095 transitions. [2023-11-12 01:01:42,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 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) [2023-11-12 01:01:42,876 INFO L276 IsEmpty]: Start isEmpty. Operand 20667 states and 27095 transitions. [2023-11-12 01:01:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-12 01:01:42,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:42,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:42,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 01:01:42,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:42,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash -756021961, now seen corresponding path program 1 times [2023-11-12 01:01:42,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:42,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456475077] [2023-11-12 01:01:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:42,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat