./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire --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 4eae6e6c8bbb105c3dcf0e7edf73f931915af6d6745ce5116ee35a4a9fee030a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:28:11,901 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:12,011 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:28:12,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:12,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:12,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:12,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:12,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:12,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:12,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:12,055 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:12,056 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:12,057 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:12,062 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:28:12,062 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:12,063 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:12,063 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:28:12,064 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:28:12,064 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:12,065 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:28:12,065 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:28:12,066 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:28:12,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:12,067 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:28:12,068 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:28:12,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:12,069 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:28:12,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:12,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:28:12,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:12,071 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:28:12,072 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:28:12,072 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:28:12,072 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:12,072 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:12,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:12,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:12,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:12,073 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:12,074 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:12,074 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:28:12,074 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:28:12,074 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:28:12,075 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:12,075 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:28:12,076 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:12,076 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:12,076 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_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eae6e6c8bbb105c3dcf0e7edf73f931915af6d6745ce5116ee35a4a9fee030a [2023-11-23 21:28:12,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:12,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:12,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:12,469 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:12,470 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:12,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-11-23 21:28:15,710 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:16,140 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:16,142 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-11-23 21:28:16,164 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/data/9f3cacbac/b0598761172c470797d5eee8adddf57d/FLAG369849757 [2023-11-23 21:28:16,178 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/data/9f3cacbac/b0598761172c470797d5eee8adddf57d [2023-11-23 21:28:16,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:16,182 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:16,184 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:16,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:16,193 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:16,194 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,195 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f55dff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16, skipping insertion in model container [2023-11-23 21:28:16,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,337 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:16,889 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_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[26539,26552] [2023-11-23 21:28:16,959 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_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[30716,30729] [2023-11-23 21:28:17,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:17,188 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:28:17,544 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_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[26539,26552] [2023-11-23 21:28:17,591 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_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[30716,30729] [2023-11-23 21:28:17,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:17,740 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:28:17,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17 WrapperNode [2023-11-23 21:28:17,741 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:17,742 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:17,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:28:17,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:28:17,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,904 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2684 [2023-11-23 21:28:17,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:17,905 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:28:17,905 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:28:17,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:28:17,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,915 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,929 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,929 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,986 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:18,018 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:18,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:18,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:18,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:28:18,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:28:18,111 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:28:18,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:28:18,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:18,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:18,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:18,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:28:18,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f7ae539-110c-4bd6-b488-4f4b38a8da0f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:28:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:28:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:28:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:28:18,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:28:18,469 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:28:18,471 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:28:20,576 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:28:21,387 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:28:21,387 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:28:21,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:21 BoogieIcfgContainer [2023-11-23 21:28:21,390 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:28:21,394 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:28:21,394 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:28:21,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:28:21,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:28:16" (1/3) ... [2023-11-23 21:28:21,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ef11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:21, skipping insertion in model container [2023-11-23 21:28:21,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (2/3) ... [2023-11-23 21:28:21,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ef11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:21, skipping insertion in model container [2023-11-23 21:28:21,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:21" (3/3) ... [2023-11-23 21:28:21,403 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2023-11-23 21:28:21,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:28:21,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:28:21,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:28:21,522 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;@11d951db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:28:21,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:28:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 534 states, 524 states have (on average 1.7328244274809161) internal successors, (908), 533 states have internal predecessors, (908), 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) [2023-11-23 21:28:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-23 21:28:21,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:21,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:21,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:21,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash 982439746, now seen corresponding path program 1 times [2023-11-23 21:28:21,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399140401] [2023-11-23 21:28:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:23,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:23,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399140401] [2023-11-23 21:28:23,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399140401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:23,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:23,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:23,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231298414] [2023-11-23 21:28:23,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:23,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:23,581 INFO L87 Difference]: Start difference. First operand has 534 states, 524 states have (on average 1.7328244274809161) internal successors, (908), 533 states have internal predecessors, (908), 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 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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) [2023-11-23 21:28:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:24,026 INFO L93 Difference]: Finished difference Result 1571 states and 2673 transitions. [2023-11-23 21:28:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:28:24,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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 210 [2023-11-23 21:28:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:24,056 INFO L225 Difference]: With dead ends: 1571 [2023-11-23 21:28:24,056 INFO L226 Difference]: Without dead ends: 1028 [2023-11-23 21:28:24,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:24,071 INFO L413 NwaCegarLoop]: 864 mSDtfsCounter, 2536 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2536 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:24,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2536 Valid, 1680 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:28:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2023-11-23 21:28:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1010. [2023-11-23 21:28:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1008 states have (on average 1.435515873015873) internal successors, (1447), 1009 states have internal predecessors, (1447), 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) [2023-11-23 21:28:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1447 transitions. [2023-11-23 21:28:24,188 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1447 transitions. Word has length 210 [2023-11-23 21:28:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:24,189 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 1447 transitions. [2023-11-23 21:28:24,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 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) [2023-11-23 21:28:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1447 transitions. [2023-11-23 21:28:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-23 21:28:24,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:24,195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:24,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:28:24,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:24,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:24,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1116694502, now seen corresponding path program 1 times [2023-11-23 21:28:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:24,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130660525] [2023-11-23 21:28:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:24,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:24,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:24,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130660525] [2023-11-23 21:28:24,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130660525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:24,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:24,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:24,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740087527] [2023-11-23 21:28:24,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:24,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:24,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:24,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:24,479 INFO L87 Difference]: Start difference. First operand 1010 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) [2023-11-23 21:28:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:24,727 INFO L93 Difference]: Finished difference Result 2019 states and 2939 transitions. [2023-11-23 21:28:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) Word has length 212 [2023-11-23 21:28:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:24,741 INFO L225 Difference]: With dead ends: 2019 [2023-11-23 21:28:24,742 INFO L226 Difference]: Without dead ends: 1357 [2023-11-23 21:28:24,745 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 [2023-11-23 21:28:24,747 INFO L413 NwaCegarLoop]: 964 mSDtfsCounter, 434 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:24,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1479 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2023-11-23 21:28:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1199. [2023-11-23 21:28:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1197 states have (on average 1.4527986633249792) internal successors, (1739), 1198 states have internal predecessors, (1739), 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) [2023-11-23 21:28:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1739 transitions. [2023-11-23 21:28:24,785 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1739 transitions. Word has length 212 [2023-11-23 21:28:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:24,788 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1739 transitions. [2023-11-23 21:28:24,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) [2023-11-23 21:28:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1739 transitions. [2023-11-23 21:28:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-23 21:28:24,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:24,794 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:24,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:28:24,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:24,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1408106648, now seen corresponding path program 1 times [2023-11-23 21:28:24,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:24,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189036759] [2023-11-23 21:28:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:24,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:25,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189036759] [2023-11-23 21:28:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189036759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:25,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:25,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005313743] [2023-11-23 21:28:25,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:25,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:25,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:25,099 INFO L87 Difference]: Start difference. First operand 1199 states and 1739 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) [2023-11-23 21:28:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:25,379 INFO L93 Difference]: Finished difference Result 3428 states and 4951 transitions. [2023-11-23 21:28:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) Word has length 212 [2023-11-23 21:28:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:25,393 INFO L225 Difference]: With dead ends: 3428 [2023-11-23 21:28:25,394 INFO L226 Difference]: Without dead ends: 2350 [2023-11-23 21:28:25,396 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 [2023-11-23 21:28:25,397 INFO L413 NwaCegarLoop]: 1312 mSDtfsCounter, 626 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:25,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 1989 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2023-11-23 21:28:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2332. [2023-11-23 21:28:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2330 states have (on average 1.4489270386266095) internal successors, (3376), 2331 states have internal predecessors, (3376), 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) [2023-11-23 21:28:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3376 transitions. [2023-11-23 21:28:25,490 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3376 transitions. Word has length 212 [2023-11-23 21:28:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:25,495 INFO L495 AbstractCegarLoop]: Abstraction has 2332 states and 3376 transitions. [2023-11-23 21:28:25,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) [2023-11-23 21:28:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3376 transitions. [2023-11-23 21:28:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-23 21:28:25,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:25,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:25,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:28:25,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:25,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1829711882, now seen corresponding path program 1 times [2023-11-23 21:28:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:25,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497566709] [2023-11-23 21:28:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:25,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:25,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497566709] [2023-11-23 21:28:25,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497566709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:25,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:25,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:25,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968708661] [2023-11-23 21:28:25,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:25,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:25,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:25,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:25,723 INFO L87 Difference]: Start difference. First operand 2332 states and 3376 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) [2023-11-23 21:28:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:25,993 INFO L93 Difference]: Finished difference Result 6844 states and 9895 transitions. [2023-11-23 21:28:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) Word has length 212 [2023-11-23 21:28:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:26,020 INFO L225 Difference]: With dead ends: 6844 [2023-11-23 21:28:26,020 INFO L226 Difference]: Without dead ends: 4644 [2023-11-23 21:28:26,026 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 [2023-11-23 21:28:26,032 INFO L413 NwaCegarLoop]: 1410 mSDtfsCounter, 740 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 2113 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:26,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 2113 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4644 states. [2023-11-23 21:28:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4644 to 2335. [2023-11-23 21:28:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2333 states have (on average 1.448349764252036) internal successors, (3379), 2334 states have internal predecessors, (3379), 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) [2023-11-23 21:28:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 3379 transitions. [2023-11-23 21:28:26,167 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 3379 transitions. Word has length 212 [2023-11-23 21:28:26,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:26,167 INFO L495 AbstractCegarLoop]: Abstraction has 2335 states and 3379 transitions. [2023-11-23 21:28:26,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 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) [2023-11-23 21:28:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 3379 transitions. [2023-11-23 21:28:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-11-23 21:28:26,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:26,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:26,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:28:26,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:26,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:26,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1648239131, now seen corresponding path program 1 times [2023-11-23 21:28:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:26,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146266102] [2023-11-23 21:28:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:26,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:27,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146266102] [2023-11-23 21:28:27,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146266102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:27,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:27,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:28:27,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851738185] [2023-11-23 21:28:27,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:27,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:28:27,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:28:27,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:27,116 INFO L87 Difference]: Start difference. First operand 2335 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 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) [2023-11-23 21:28:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:27,437 INFO L93 Difference]: Finished difference Result 6781 states and 9800 transitions. [2023-11-23 21:28:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 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 213 [2023-11-23 21:28:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:27,461 INFO L225 Difference]: With dead ends: 6781 [2023-11-23 21:28:27,462 INFO L226 Difference]: Without dead ends: 4461 [2023-11-23 21:28:27,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:27,468 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 2073 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:27,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 1817 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2023-11-23 21:28:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 4443. [2023-11-23 21:28:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4441 states have (on average 1.438865120468363) internal successors, (6390), 4442 states have internal predecessors, (6390), 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) [2023-11-23 21:28:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 6390 transitions. [2023-11-23 21:28:27,642 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 6390 transitions. Word has length 213 [2023-11-23 21:28:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:27,643 INFO L495 AbstractCegarLoop]: Abstraction has 4443 states and 6390 transitions. [2023-11-23 21:28:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 4 states have internal predecessors, (213), 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) [2023-11-23 21:28:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 6390 transitions. [2023-11-23 21:28:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-23 21:28:27,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:27,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:27,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:28:27,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:27,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1304103363, now seen corresponding path program 1 times [2023-11-23 21:28:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:27,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481747426] [2023-11-23 21:28:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:27,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:28,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481747426] [2023-11-23 21:28:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481747426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:28,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:28,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:28,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264687023] [2023-11-23 21:28:28,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:28,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:28,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:28,544 INFO L87 Difference]: Start difference. First operand 4443 states and 6390 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 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) [2023-11-23 21:28:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:28,876 INFO L93 Difference]: Finished difference Result 12826 states and 18404 transitions. [2023-11-23 21:28:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:28,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 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 214 [2023-11-23 21:28:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:28,919 INFO L225 Difference]: With dead ends: 12826 [2023-11-23 21:28:28,919 INFO L226 Difference]: Without dead ends: 8521 [2023-11-23 21:28:28,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:28,926 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 1599 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1599 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:28,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1599 Valid, 1813 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8521 states. [2023-11-23 21:28:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8521 to 8503. [2023-11-23 21:28:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8503 states, 8501 states have (on average 1.428420185860487) internal successors, (12143), 8502 states have internal predecessors, (12143), 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) [2023-11-23 21:28:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8503 states to 8503 states and 12143 transitions. [2023-11-23 21:28:29,178 INFO L78 Accepts]: Start accepts. Automaton has 8503 states and 12143 transitions. Word has length 214 [2023-11-23 21:28:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:29,179 INFO L495 AbstractCegarLoop]: Abstraction has 8503 states and 12143 transitions. [2023-11-23 21:28:29,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 3 states have internal predecessors, (214), 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) [2023-11-23 21:28:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8503 states and 12143 transitions. [2023-11-23 21:28:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-23 21:28:29,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:29,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:29,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:28:29,199 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:29,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1516630542, now seen corresponding path program 1 times [2023-11-23 21:28:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101450772] [2023-11-23 21:28:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:29,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:30,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:30,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101450772] [2023-11-23 21:28:30,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101450772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:30,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:30,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350364282] [2023-11-23 21:28:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:30,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:30,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:30,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:30,132 INFO L87 Difference]: Start difference. First operand 8503 states and 12143 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2023-11-23 21:28:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:30,533 INFO L93 Difference]: Finished difference Result 24915 states and 35508 transitions. [2023-11-23 21:28:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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 216 [2023-11-23 21:28:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:30,596 INFO L225 Difference]: With dead ends: 24915 [2023-11-23 21:28:30,596 INFO L226 Difference]: Without dead ends: 16554 [2023-11-23 21:28:30,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:30,610 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 1737 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:30,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 1635 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16554 states. [2023-11-23 21:28:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16554 to 16536. [2023-11-23 21:28:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16536 states, 16534 states have (on average 1.4168985121567679) internal successors, (23427), 16535 states have internal predecessors, (23427), 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) [2023-11-23 21:28:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16536 states to 16536 states and 23427 transitions. [2023-11-23 21:28:31,156 INFO L78 Accepts]: Start accepts. Automaton has 16536 states and 23427 transitions. Word has length 216 [2023-11-23 21:28:31,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:31,157 INFO L495 AbstractCegarLoop]: Abstraction has 16536 states and 23427 transitions. [2023-11-23 21:28:31,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2023-11-23 21:28:31,158 INFO L276 IsEmpty]: Start isEmpty. Operand 16536 states and 23427 transitions. [2023-11-23 21:28:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-23 21:28:31,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:31,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:31,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:28:31,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:31,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -327659855, now seen corresponding path program 1 times [2023-11-23 21:28:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:31,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603571938] [2023-11-23 21:28:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:31,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:31,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603571938] [2023-11-23 21:28:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603571938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:31,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:31,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875348456] [2023-11-23 21:28:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:31,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:31,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:31,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:31,405 INFO L87 Difference]: Start difference. First operand 16536 states and 23427 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-23 21:28:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:31,942 INFO L93 Difference]: Finished difference Result 47295 states and 66706 transitions. [2023-11-23 21:28:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 218 [2023-11-23 21:28:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:32,011 INFO L225 Difference]: With dead ends: 47295 [2023-11-23 21:28:32,012 INFO L226 Difference]: Without dead ends: 32321 [2023-11-23 21:28:32,032 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 [2023-11-23 21:28:32,033 INFO L413 NwaCegarLoop]: 1356 mSDtfsCounter, 608 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:32,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 2033 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:28:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32321 states. [2023-11-23 21:28:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32321 to 32303. [2023-11-23 21:28:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32303 states, 32301 states have (on average 1.4085632023776353) internal successors, (45498), 32302 states have internal predecessors, (45498), 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) [2023-11-23 21:28:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32303 states to 32303 states and 45498 transitions. [2023-11-23 21:28:33,117 INFO L78 Accepts]: Start accepts. Automaton has 32303 states and 45498 transitions. Word has length 218 [2023-11-23 21:28:33,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:33,118 INFO L495 AbstractCegarLoop]: Abstraction has 32303 states and 45498 transitions. [2023-11-23 21:28:33,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-23 21:28:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32303 states and 45498 transitions. [2023-11-23 21:28:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-23 21:28:33,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:33,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:33,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:28:33,177 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:33,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1239428288, now seen corresponding path program 1 times [2023-11-23 21:28:33,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:33,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317425349] [2023-11-23 21:28:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:33,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317425349] [2023-11-23 21:28:33,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317425349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:33,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:33,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:33,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256611009] [2023-11-23 21:28:33,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:33,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:33,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:33,342 INFO L87 Difference]: Start difference. First operand 32303 states and 45498 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-23 21:28:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:34,234 INFO L93 Difference]: Finished difference Result 94974 states and 133612 transitions. [2023-11-23 21:28:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 218 [2023-11-23 21:28:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:34,498 INFO L225 Difference]: With dead ends: 94974 [2023-11-23 21:28:34,498 INFO L226 Difference]: Without dead ends: 64357 [2023-11-23 21:28:34,555 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 [2023-11-23 21:28:34,572 INFO L413 NwaCegarLoop]: 1389 mSDtfsCounter, 716 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 2092 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:28:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64357 states. [2023-11-23 21:28:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64357 to 32336. [2023-11-23 21:28:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32336 states, 32334 states have (on average 1.4081462237892002) internal successors, (45531), 32335 states have internal predecessors, (45531), 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) [2023-11-23 21:28:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32336 states to 32336 states and 45531 transitions. [2023-11-23 21:28:35,930 INFO L78 Accepts]: Start accepts. Automaton has 32336 states and 45531 transitions. Word has length 218 [2023-11-23 21:28:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:35,931 INFO L495 AbstractCegarLoop]: Abstraction has 32336 states and 45531 transitions. [2023-11-23 21:28:35,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-23 21:28:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32336 states and 45531 transitions. [2023-11-23 21:28:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-23 21:28:35,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:35,984 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:35,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:28:35,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:35,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1371030626, now seen corresponding path program 1 times [2023-11-23 21:28:35,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:35,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432878181] [2023-11-23 21:28:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:36,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432878181] [2023-11-23 21:28:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432878181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:36,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:36,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26758349] [2023-11-23 21:28:36,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:36,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:36,324 INFO L87 Difference]: Start difference. First operand 32336 states and 45531 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-23 21:28:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:36,959 INFO L93 Difference]: Finished difference Result 67349 states and 97021 transitions. [2023-11-23 21:28:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 218 [2023-11-23 21:28:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:37,090 INFO L225 Difference]: With dead ends: 67349 [2023-11-23 21:28:37,091 INFO L226 Difference]: Without dead ends: 45207 [2023-11-23 21:28:37,119 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 [2023-11-23 21:28:37,120 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 398 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:37,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1446 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45207 states. [2023-11-23 21:28:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45207 to 41684. [2023-11-23 21:28:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41684 states, 41682 states have (on average 1.4310973561729283) internal successors, (59651), 41683 states have internal predecessors, (59651), 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) [2023-11-23 21:28:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41684 states to 41684 states and 59651 transitions. [2023-11-23 21:28:38,261 INFO L78 Accepts]: Start accepts. Automaton has 41684 states and 59651 transitions. Word has length 218 [2023-11-23 21:28:38,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:38,261 INFO L495 AbstractCegarLoop]: Abstraction has 41684 states and 59651 transitions. [2023-11-23 21:28:38,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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) [2023-11-23 21:28:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 41684 states and 59651 transitions. [2023-11-23 21:28:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-23 21:28:38,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:38,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:38,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:28:38,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:38,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1076225039, now seen corresponding path program 1 times [2023-11-23 21:28:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:38,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943277192] [2023-11-23 21:28:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:38,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:39,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943277192] [2023-11-23 21:28:39,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943277192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:39,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:39,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:28:39,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994019340] [2023-11-23 21:28:39,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:39,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:28:39,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:28:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:39,385 INFO L87 Difference]: Start difference. First operand 41684 states and 59651 transitions. Second operand has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 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) [2023-11-23 21:28:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:40,329 INFO L93 Difference]: Finished difference Result 121655 states and 173920 transitions. [2023-11-23 21:28:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:40,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 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 219 [2023-11-23 21:28:40,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:40,503 INFO L225 Difference]: With dead ends: 121655 [2023-11-23 21:28:40,504 INFO L226 Difference]: Without dead ends: 80171 [2023-11-23 21:28:40,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:40,547 INFO L413 NwaCegarLoop]: 1126 mSDtfsCounter, 1415 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1415 SdHoareTripleChecker+Valid, 2464 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:40,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1415 Valid, 2464 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:28:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80171 states. [2023-11-23 21:28:42,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80171 to 80153. [2023-11-23 21:28:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80153 states, 80151 states have (on average 1.4228892964529452) internal successors, (114046), 80152 states have internal predecessors, (114046), 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) [2023-11-23 21:28:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80153 states to 80153 states and 114046 transitions. [2023-11-23 21:28:42,372 INFO L78 Accepts]: Start accepts. Automaton has 80153 states and 114046 transitions. Word has length 219 [2023-11-23 21:28:42,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:42,373 INFO L495 AbstractCegarLoop]: Abstraction has 80153 states and 114046 transitions. [2023-11-23 21:28:42,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 4 states have internal predecessors, (219), 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) [2023-11-23 21:28:42,373 INFO L276 IsEmpty]: Start isEmpty. Operand 80153 states and 114046 transitions. [2023-11-23 21:28:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-23 21:28:42,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:42,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:42,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:28:42,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:42,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash 11913704, now seen corresponding path program 1 times [2023-11-23 21:28:42,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:42,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786726340] [2023-11-23 21:28:42,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:42,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:43,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:43,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786726340] [2023-11-23 21:28:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786726340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:43,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:43,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:43,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552894520] [2023-11-23 21:28:43,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:43,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:43,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:43,546 INFO L87 Difference]: Start difference. First operand 80153 states and 114046 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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) [2023-11-23 21:28:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:45,098 INFO L93 Difference]: Finished difference Result 230447 states and 326992 transitions. [2023-11-23 21:28:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:45,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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 220 [2023-11-23 21:28:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:45,353 INFO L225 Difference]: With dead ends: 230447 [2023-11-23 21:28:45,354 INFO L226 Difference]: Without dead ends: 152558 [2023-11-23 21:28:45,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:45,422 INFO L413 NwaCegarLoop]: 1124 mSDtfsCounter, 1586 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:45,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 1797 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152558 states. [2023-11-23 21:28:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152558 to 152540. [2023-11-23 21:28:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152540 states, 152538 states have (on average 1.4120350338931937) internal successors, (215389), 152539 states have internal predecessors, (215389), 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) [2023-11-23 21:28:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152540 states to 152540 states and 215389 transitions. [2023-11-23 21:28:48,262 INFO L78 Accepts]: Start accepts. Automaton has 152540 states and 215389 transitions. Word has length 220 [2023-11-23 21:28:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:48,263 INFO L495 AbstractCegarLoop]: Abstraction has 152540 states and 215389 transitions. [2023-11-23 21:28:48,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 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) [2023-11-23 21:28:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 152540 states and 215389 transitions. [2023-11-23 21:28:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-23 21:28:48,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:48,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:48,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 21:28:48,385 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:48,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash -338465887, now seen corresponding path program 1 times [2023-11-23 21:28:48,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:48,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699796950] [2023-11-23 21:28:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:48,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:49,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:49,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699796950] [2023-11-23 21:28:49,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699796950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:49,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:49,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:49,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292983771] [2023-11-23 21:28:49,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:49,975 INFO L87 Difference]: Start difference. First operand 152540 states and 215389 transitions. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-23 21:28:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:51,836 INFO L93 Difference]: Finished difference Result 322928 states and 453941 transitions. [2023-11-23 21:28:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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 222 [2023-11-23 21:28:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:52,069 INFO L225 Difference]: With dead ends: 322928 [2023-11-23 21:28:52,069 INFO L226 Difference]: Without dead ends: 171889 [2023-11-23 21:28:52,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:52,167 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 1959 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:52,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1959 Valid, 1385 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171889 states. [2023-11-23 21:28:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171889 to 154463. [2023-11-23 21:28:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154463 states, 154461 states have (on average 1.4119680696098045) internal successors, (218094), 154462 states have internal predecessors, (218094), 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) [2023-11-23 21:28:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154463 states to 154463 states and 218094 transitions. [2023-11-23 21:28:55,516 INFO L78 Accepts]: Start accepts. Automaton has 154463 states and 218094 transitions. Word has length 222 [2023-11-23 21:28:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:55,517 INFO L495 AbstractCegarLoop]: Abstraction has 154463 states and 218094 transitions. [2023-11-23 21:28:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-23 21:28:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 154463 states and 218094 transitions. [2023-11-23 21:28:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-23 21:28:55,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:55,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:55,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 21:28:55,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:55,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1419738593, now seen corresponding path program 1 times [2023-11-23 21:28:55,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:55,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589700345] [2023-11-23 21:28:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:55,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:55,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:55,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589700345] [2023-11-23 21:28:55,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589700345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:55,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:55,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789029917] [2023-11-23 21:28:55,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:55,846 INFO L87 Difference]: Start difference. First operand 154463 states and 218094 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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)