./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2164ea7ff9e119435a975a3ff24098e6247a3cb559bae891b283444f40f36a64 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:58,929 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:59,013 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:03:59,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:59,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:59,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:59,051 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:59,052 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:59,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:59,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:59,055 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:59,056 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:59,056 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:59,057 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:59,058 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:59,059 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:59,059 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:59,060 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:59,061 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:59,061 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:59,062 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:59,063 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:59,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:59,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:59,065 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:59,066 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:59,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:59,067 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:59,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:59,068 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:59,069 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:59,069 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:59,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:59,070 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:59,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:59,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:59,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:59,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:59,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:59,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:59,073 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:59,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:59,074 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:59,074 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:59,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:59,075 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_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2164ea7ff9e119435a975a3ff24098e6247a3cb559bae891b283444f40f36a64 [2023-11-12 01:03:59,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:59,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:59,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:59,451 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:59,452 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:59,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c [2023-11-12 01:04:02,622 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:04:02,981 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:04:02,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c [2023-11-12 01:04:03,016 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/data/e7d6e4ec3/0d8665ae7dfe4770b93685696d714c3c/FLAGbed163305 [2023-11-12 01:04:03,038 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/data/e7d6e4ec3/0d8665ae7dfe4770b93685696d714c3c [2023-11-12 01:04:03,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:04:03,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:04:03,059 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:04:03,059 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:04:03,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:04:03,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:03,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb9d874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03, skipping insertion in model container [2023-11-12 01:04:03,069 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:03,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:04:03,491 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_f74e6183-6356-49b6-a6a7-6a61bdae33a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c[11829,11842] [2023-11-12 01:04:03,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:04:03,654 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:04:03,757 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_f74e6183-6356-49b6-a6a7-6a61bdae33a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c[11829,11842] [2023-11-12 01:04:03,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:04:03,845 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:04:03,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03 WrapperNode [2023-11-12 01:04:03,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:04:03,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:04:03,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:04:03,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:04:03,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:03,879 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:03,947 INFO L138 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1040 [2023-11-12 01:04:03,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:04:03,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:04:03,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:04:03,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:04:03,961 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:03,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:03,968 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:03,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:04,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:04,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:04,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:04,052 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:04,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:04:04,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:04:04,064 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:04:04,064 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:04:04,065 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (1/1) ... [2023-11-12 01:04:04,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:04:04,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:04,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:04:04,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f74e6183-6356-49b6-a6a7-6a61bdae33a8/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:04:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:04:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:04:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:04:04,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:04:04,372 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:04:04,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:04:05,581 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:04:05,905 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:04:05,905 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 01:04:05,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:04:05 BoogieIcfgContainer [2023-11-12 01:04:05,910 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:04:05,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:04:05,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:04:05,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:04:05,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:04:03" (1/3) ... [2023-11-12 01:04:05,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72049e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:04:05, skipping insertion in model container [2023-11-12 01:04:05,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:04:03" (2/3) ... [2023-11-12 01:04:05,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72049e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:04:05, skipping insertion in model container [2023-11-12 01:04:05,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:04:05" (3/3) ... [2023-11-12 01:04:05,926 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+nlh-reducer.c [2023-11-12 01:04:05,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:04:05,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:04:06,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:04:06,055 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;@7f9101df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:04:06,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:04:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 167 states have (on average 1.784431137724551) internal successors, (298), 169 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-12 01:04:06,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:06,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:06,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:06,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:06,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1742711441, now seen corresponding path program 1 times [2023-11-12 01:04:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:06,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856494843] [2023-11-12 01:04:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:06,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:07,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:07,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856494843] [2023-11-12 01:04:07,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856494843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:07,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:07,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:07,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006934822] [2023-11-12 01:04:07,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:07,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:07,123 INFO L87 Difference]: Start difference. First operand has 170 states, 167 states have (on average 1.784431137724551) internal successors, (298), 169 states have internal predecessors, (298), 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 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:07,530 INFO L93 Difference]: Finished difference Result 261 states and 437 transitions. [2023-11-12 01:04:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-11-12 01:04:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:07,543 INFO L225 Difference]: With dead ends: 261 [2023-11-12 01:04:07,546 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:07,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:07,559 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 730 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:07,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 251 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:07,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 166 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2023-11-12 01:04:07,629 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 108 [2023-11-12 01:04:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:07,632 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2023-11-12 01:04:07,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2023-11-12 01:04:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-12 01:04:07,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:07,637 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] [2023-11-12 01:04:07,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:04:07,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:07,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1275075629, now seen corresponding path program 1 times [2023-11-12 01:04:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:07,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184186042] [2023-11-12 01:04:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:07,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:08,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184186042] [2023-11-12 01:04:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184186042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:08,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:08,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:08,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920372481] [2023-11-12 01:04:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:08,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:08,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:08,118 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:08,342 INFO L93 Difference]: Finished difference Result 259 states and 322 transitions. [2023-11-12 01:04:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 109 [2023-11-12 01:04:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:08,350 INFO L225 Difference]: With dead ends: 259 [2023-11-12 01:04:08,350 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:08,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:08,358 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 499 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:08,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 122 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1927710843373494) internal successors, (198), 166 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2023-11-12 01:04:08,378 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 109 [2023-11-12 01:04:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:08,378 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2023-11-12 01:04:08,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2023-11-12 01:04:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 01:04:08,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:08,385 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] [2023-11-12 01:04:08,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:04:08,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:08,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1261096657, now seen corresponding path program 1 times [2023-11-12 01:04:08,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787824927] [2023-11-12 01:04:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:08,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:08,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787824927] [2023-11-12 01:04:08,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787824927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:08,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:08,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629412040] [2023-11-12 01:04:08,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:08,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:08,730 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:08,948 INFO L93 Difference]: Finished difference Result 255 states and 314 transitions. [2023-11-12 01:04:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2023-11-12 01:04:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:08,954 INFO L225 Difference]: With dead ends: 255 [2023-11-12 01:04:08,954 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:08,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:08,967 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 481 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:08,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 130 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.180722891566265) internal successors, (196), 166 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 196 transitions. [2023-11-12 01:04:08,977 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 196 transitions. Word has length 110 [2023-11-12 01:04:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:08,982 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 196 transitions. [2023-11-12 01:04:08,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 196 transitions. [2023-11-12 01:04:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-12 01:04:08,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:08,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:08,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:04:08,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:08,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1711114887, now seen corresponding path program 1 times [2023-11-12 01:04:08,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:08,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558027218] [2023-11-12 01:04:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:08,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:09,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:09,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558027218] [2023-11-12 01:04:09,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558027218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:09,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:09,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905092978] [2023-11-12 01:04:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:09,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:09,208 INFO L87 Difference]: Start difference. First operand 167 states and 196 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:09,408 INFO L93 Difference]: Finished difference Result 263 states and 319 transitions. [2023-11-12 01:04:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-12 01:04:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:09,410 INFO L225 Difference]: With dead ends: 263 [2023-11-12 01:04:09,410 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:09,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:09,412 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 498 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:09,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 114 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 166 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2023-11-12 01:04:09,422 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 111 [2023-11-12 01:04:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:09,423 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2023-11-12 01:04:09,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2023-11-12 01:04:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-12 01:04:09,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:09,426 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] [2023-11-12 01:04:09,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:04:09,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:09,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1972782087, now seen corresponding path program 1 times [2023-11-12 01:04:09,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:09,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340972513] [2023-11-12 01:04:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:09,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:09,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340972513] [2023-11-12 01:04:09,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340972513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:09,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:09,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:09,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141857814] [2023-11-12 01:04:09,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:09,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:09,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:09,657 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:09,858 INFO L93 Difference]: Finished difference Result 267 states and 320 transitions. [2023-11-12 01:04:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 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 112 [2023-11-12 01:04:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:09,860 INFO L225 Difference]: With dead ends: 267 [2023-11-12 01:04:09,861 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:09,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:09,862 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 420 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:09,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 142 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:04:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2023-11-12 01:04:09,888 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 112 [2023-11-12 01:04:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:09,889 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2023-11-12 01:04:09,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:09,889 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2023-11-12 01:04:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-12 01:04:09,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:09,892 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] [2023-11-12 01:04:09,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:04:09,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:09,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash -676205509, now seen corresponding path program 1 times [2023-11-12 01:04:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:09,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39347130] [2023-11-12 01:04:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:10,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39347130] [2023-11-12 01:04:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39347130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:10,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240183747] [2023-11-12 01:04:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:10,182 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:10,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:10,347 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2023-11-12 01:04:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 113 [2023-11-12 01:04:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:10,354 INFO L225 Difference]: With dead ends: 243 [2023-11-12 01:04:10,355 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:10,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:10,357 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 429 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:10,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 154 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1506024096385543) internal successors, (191), 166 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 191 transitions. [2023-11-12 01:04:10,368 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 191 transitions. Word has length 113 [2023-11-12 01:04:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:10,370 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 191 transitions. [2023-11-12 01:04:10,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 191 transitions. [2023-11-12 01:04:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-12 01:04:10,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:10,372 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] [2023-11-12 01:04:10,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:04:10,373 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:10,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2036419735, now seen corresponding path program 1 times [2023-11-12 01:04:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:10,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28769415] [2023-11-12 01:04:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:10,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:10,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28769415] [2023-11-12 01:04:10,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28769415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:10,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:10,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132052871] [2023-11-12 01:04:10,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:10,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:10,613 INFO L87 Difference]: Start difference. First operand 167 states and 191 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:10,766 INFO L93 Difference]: Finished difference Result 247 states and 294 transitions. [2023-11-12 01:04:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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 114 [2023-11-12 01:04:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:10,768 INFO L225 Difference]: With dead ends: 247 [2023-11-12 01:04:10,768 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:10,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:10,770 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 434 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:10,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 146 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 189 transitions. [2023-11-12 01:04:10,776 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 189 transitions. Word has length 114 [2023-11-12 01:04:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:10,777 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 189 transitions. [2023-11-12 01:04:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 189 transitions. [2023-11-12 01:04:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-12 01:04:10,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:10,779 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] [2023-11-12 01:04:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:04:10,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:10,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:10,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2124094703, now seen corresponding path program 1 times [2023-11-12 01:04:10,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:10,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603383176] [2023-11-12 01:04:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:10,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:11,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:11,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603383176] [2023-11-12 01:04:11,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603383176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:11,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:11,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788659666] [2023-11-12 01:04:11,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:11,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:11,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:11,035 INFO L87 Difference]: Start difference. First operand 167 states and 189 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:11,232 INFO L93 Difference]: Finished difference Result 239 states and 282 transitions. [2023-11-12 01:04:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:11,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 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 115 [2023-11-12 01:04:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:11,235 INFO L225 Difference]: With dead ends: 239 [2023-11-12 01:04:11,235 INFO L226 Difference]: Without dead ends: 167 [2023-11-12 01:04:11,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:11,236 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 405 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:11,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 162 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-12 01:04:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-12 01:04:11,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 166 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2023-11-12 01:04:11,242 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 115 [2023-11-12 01:04:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:11,243 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2023-11-12 01:04:11,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:04:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2023-11-12 01:04:11,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-12 01:04:11,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:11,245 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] [2023-11-12 01:04:11,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:04:11,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:11,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -337996863, now seen corresponding path program 1 times [2023-11-12 01:04:11,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:11,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460190842] [2023-11-12 01:04:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:11,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:45,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:45,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460190842] [2023-11-12 01:04:45,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460190842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:45,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:45,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2023-11-12 01:04:45,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4166679] [2023-11-12 01:04:45,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:45,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-12 01:04:45,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:45,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-12 01:04:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2633, Unknown=0, NotChecked=0, Total=2862 [2023-11-12 01:04:45,218 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 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)