./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --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 37da121d1485cf4d7db5098d27ad9010a5336c778943ff6fd7c53fe4a9fdfbdc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:00:22,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:00:22,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:00:22,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:00:22,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:00:22,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:00:22,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:00:22,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:00:23,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:00:23,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:00:23,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:00:23,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:00:23,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:00:23,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:00:23,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:00:23,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:00:23,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:00:23,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:00:23,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:00:23,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:00:23,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:00:23,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:00:23,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:00:23,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:00:23,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:00:23,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:00:23,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:00:23,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:00:23,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:00:23,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:00:23,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:00:23,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:00:23,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:00:23,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:00:23,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:00:23,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:00:23,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:00:23,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:00:23,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:00:23,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:00:23,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:00:23,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:00:23,051 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:00:23,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:00:23,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:00:23,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:00:23,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:00:23,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:00:23,052 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:00:23,053 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:00:23,053 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:00:23,053 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:00:23,053 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:00:23,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:00:23,054 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:00:23,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:00:23,054 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:00:23,054 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:00:23,054 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:00:23,055 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:00:23,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:00:23,055 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:00:23,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:00:23,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:00:23,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:00:23,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:00:23,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:00:23,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:00:23,057 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:00:23,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:00:23,057 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:00:23,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:00:23,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:00:23,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:00:23,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:00:23,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:00:23,058 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:00:23,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:00:23,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:00:23,059 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:00:23,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:00:23,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:00:23,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:00:23,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37da121d1485cf4d7db5098d27ad9010a5336c778943ff6fd7c53fe4a9fdfbdc [2022-12-14 10:00:23,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:00:23,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:00:23,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:00:23,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:00:23,277 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:00:23,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 10:00:25,878 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:00:26,046 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:00:26,047 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 10:00:26,054 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/data/d33dd1bc9/cac28b3bd8854430bb766d21af652b11/FLAG7e6b67fca [2022-12-14 10:00:26,067 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/data/d33dd1bc9/cac28b3bd8854430bb766d21af652b11 [2022-12-14 10:00:26,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:00:26,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:00:26,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:00:26,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:00:26,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:00:26,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9230783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26, skipping insertion in model container [2022-12-14 10:00:26,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:00:26,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:00:26,294 WARN L237 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_a44fab91-83b3-41c7-b24f-83043c73b9ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2022-12-14 10:00:26,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:00:26,348 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:00:26,407 WARN L237 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_a44fab91-83b3-41c7-b24f-83043c73b9ee/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2022-12-14 10:00:26,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:00:26,451 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:00:26,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26 WrapperNode [2022-12-14 10:00:26,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:00:26,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:00:26,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:00:26,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:00:26,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,490 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 790 [2022-12-14 10:00:26,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:00:26,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:00:26,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:00:26,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:00:26,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:00:26,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:00:26,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:00:26,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:00:26,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (1/1) ... [2022-12-14 10:00:26,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:00:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:00:26,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:00:26,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a44fab91-83b3-41c7-b24f-83043c73b9ee/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:00:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:00:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:00:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:00:26,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:00:26,692 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:00:26,693 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:00:27,214 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:00:27,345 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:00:27,346 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 10:00:27,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:00:27 BoogieIcfgContainer [2022-12-14 10:00:27,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:00:27,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:00:27,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:00:27,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:00:27,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:00:26" (1/3) ... [2022-12-14 10:00:27,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50692134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:00:27, skipping insertion in model container [2022-12-14 10:00:27,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:00:26" (2/3) ... [2022-12-14 10:00:27,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50692134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:00:27, skipping insertion in model container [2022-12-14 10:00:27,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:00:27" (3/3) ... [2022-12-14 10:00:27,357 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2022-12-14 10:00:27,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:00:27,376 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:00:27,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:00:27,432 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=LoopsAndPotentialCycles, 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;@476863b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:00:27,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:00:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 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) [2022-12-14 10:00:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 10:00:27,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:27,442 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] [2022-12-14 10:00:27,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash -557134959, now seen corresponding path program 1 times [2022-12-14 10:00:27,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:27,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752260083] [2022-12-14 10:00:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:27,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:27,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:27,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752260083] [2022-12-14 10:00:27,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752260083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:27,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:27,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:00:27,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358545678] [2022-12-14 10:00:27,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:27,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:00:27,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:27,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:00:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:00:27,928 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 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 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2022-12-14 10:00:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:28,325 INFO L93 Difference]: Finished difference Result 564 states and 904 transitions. [2022-12-14 10:00:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:00:28,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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 67 [2022-12-14 10:00:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:28,340 INFO L225 Difference]: With dead ends: 564 [2022-12-14 10:00:28,340 INFO L226 Difference]: Without dead ends: 469 [2022-12-14 10:00:28,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:00:28,346 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 686 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:28,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1349 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:00:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-12-14 10:00:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2022-12-14 10:00:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4152173913043478) internal successors, (651), 460 states have internal predecessors, (651), 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) [2022-12-14 10:00:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 651 transitions. [2022-12-14 10:00:28,448 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 651 transitions. Word has length 67 [2022-12-14 10:00:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:28,448 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 651 transitions. [2022-12-14 10:00:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 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) [2022-12-14 10:00:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 651 transitions. [2022-12-14 10:00:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:00:28,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:28,450 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] [2022-12-14 10:00:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:00:28,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash -707625794, now seen corresponding path program 1 times [2022-12-14 10:00:28,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:28,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722555157] [2022-12-14 10:00:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:28,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:28,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722555157] [2022-12-14 10:00:28,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722555157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:28,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:28,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:00:28,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87019275] [2022-12-14 10:00:28,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:28,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:00:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:00:28,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:00:28,582 INFO L87 Difference]: Start difference. First operand 461 states and 651 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:28,934 INFO L93 Difference]: Finished difference Result 1109 states and 1611 transitions. [2022-12-14 10:00:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:00:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-14 10:00:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:28,936 INFO L225 Difference]: With dead ends: 1109 [2022-12-14 10:00:28,937 INFO L226 Difference]: Without dead ends: 728 [2022-12-14 10:00:28,938 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 [2022-12-14 10:00:28,939 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 567 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:28,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 234 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:00:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-12-14 10:00:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2022-12-14 10:00:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.446896551724138) internal successors, (1049), 725 states have internal predecessors, (1049), 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) [2022-12-14 10:00:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1049 transitions. [2022-12-14 10:00:29,028 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1049 transitions. Word has length 68 [2022-12-14 10:00:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:29,028 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1049 transitions. [2022-12-14 10:00:29,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1049 transitions. [2022-12-14 10:00:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:00:29,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:29,030 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] [2022-12-14 10:00:29,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:00:29,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:29,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1204520307, now seen corresponding path program 1 times [2022-12-14 10:00:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:29,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600124262] [2022-12-14 10:00:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:29,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:29,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600124262] [2022-12-14 10:00:29,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600124262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:29,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:29,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:00:29,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318156052] [2022-12-14 10:00:29,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:29,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:00:29,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:00:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:00:29,171 INFO L87 Difference]: Start difference. First operand 726 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:29,555 INFO L93 Difference]: Finished difference Result 1874 states and 2770 transitions. [2022-12-14 10:00:29,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:00:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-14 10:00:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:29,558 INFO L225 Difference]: With dead ends: 1874 [2022-12-14 10:00:29,558 INFO L226 Difference]: Without dead ends: 1258 [2022-12-14 10:00:29,559 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 [2022-12-14 10:00:29,560 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 550 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:29,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 242 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:00:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-12-14 10:00:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2022-12-14 10:00:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.4685258964143426) internal successors, (1843), 1255 states have internal predecessors, (1843), 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) [2022-12-14 10:00:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1843 transitions. [2022-12-14 10:00:29,659 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1843 transitions. Word has length 68 [2022-12-14 10:00:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1843 transitions. [2022-12-14 10:00:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1843 transitions. [2022-12-14 10:00:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:00:29,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:29,661 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] [2022-12-14 10:00:29,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:00:29,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:29,662 INFO L85 PathProgramCache]: Analyzing trace with hash 701000348, now seen corresponding path program 1 times [2022-12-14 10:00:29,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:29,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855792490] [2022-12-14 10:00:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:29,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:29,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855792490] [2022-12-14 10:00:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855792490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:29,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:29,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:00:29,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730238540] [2022-12-14 10:00:29,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:29,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:00:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:29,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:00:29,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:00:29,750 INFO L87 Difference]: Start difference. First operand 1256 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:30,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:30,187 INFO L93 Difference]: Finished difference Result 3430 states and 5115 transitions. [2022-12-14 10:00:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:00:30,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-14 10:00:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:30,193 INFO L225 Difference]: With dead ends: 3430 [2022-12-14 10:00:30,193 INFO L226 Difference]: Without dead ends: 2318 [2022-12-14 10:00:30,194 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 [2022-12-14 10:00:30,195 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 568 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:30,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 243 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:00:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-12-14 10:00:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2022-12-14 10:00:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4807775377969763) internal successors, (3428), 2315 states have internal predecessors, (3428), 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) [2022-12-14 10:00:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3428 transitions. [2022-12-14 10:00:30,376 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3428 transitions. Word has length 68 [2022-12-14 10:00:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:30,377 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 3428 transitions. [2022-12-14 10:00:30,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3428 transitions. [2022-12-14 10:00:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:00:30,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:30,378 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] [2022-12-14 10:00:30,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:00:30,378 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1467478319, now seen corresponding path program 1 times [2022-12-14 10:00:30,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:30,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995708544] [2022-12-14 10:00:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:30,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:30,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995708544] [2022-12-14 10:00:30,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995708544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:30,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:30,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:00:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075883403] [2022-12-14 10:00:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:00:30,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:00:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:00:30,483 INFO L87 Difference]: Start difference. First operand 2316 states and 3428 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:31,204 INFO L93 Difference]: Finished difference Result 6697 states and 9989 transitions. [2022-12-14 10:00:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:00:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-14 10:00:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:31,221 INFO L225 Difference]: With dead ends: 6697 [2022-12-14 10:00:31,221 INFO L226 Difference]: Without dead ends: 4438 [2022-12-14 10:00:31,225 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 [2022-12-14 10:00:31,226 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 560 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:31,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 226 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:00:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-12-14 10:00:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4436. [2022-12-14 10:00:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4793686583990981) internal successors, (6561), 4435 states have internal predecessors, (6561), 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) [2022-12-14 10:00:31,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6561 transitions. [2022-12-14 10:00:31,669 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6561 transitions. Word has length 68 [2022-12-14 10:00:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:31,669 INFO L495 AbstractCegarLoop]: Abstraction has 4436 states and 6561 transitions. [2022-12-14 10:00:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6561 transitions. [2022-12-14 10:00:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 10:00:31,670 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:31,670 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] [2022-12-14 10:00:31,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:00:31,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:31,671 INFO L85 PathProgramCache]: Analyzing trace with hash -303409184, now seen corresponding path program 1 times [2022-12-14 10:00:31,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:31,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077703402] [2022-12-14 10:00:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:31,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:31,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077703402] [2022-12-14 10:00:31,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077703402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:31,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:31,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:00:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368600856] [2022-12-14 10:00:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:31,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:00:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:00:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:00:31,759 INFO L87 Difference]: Start difference. First operand 4436 states and 6561 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:32,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:32,630 INFO L93 Difference]: Finished difference Result 12353 states and 18326 transitions. [2022-12-14 10:00:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:00:32,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-14 10:00:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:32,647 INFO L225 Difference]: With dead ends: 12353 [2022-12-14 10:00:32,648 INFO L226 Difference]: Without dead ends: 7958 [2022-12-14 10:00:32,652 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 [2022-12-14 10:00:32,653 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 565 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:32,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 218 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:00:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2022-12-14 10:00:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7956. [2022-12-14 10:00:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 7955 states have (on average 1.4681332495285984) internal successors, (11679), 7955 states have internal predecessors, (11679), 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) [2022-12-14 10:00:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11679 transitions. [2022-12-14 10:00:33,362 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11679 transitions. Word has length 68 [2022-12-14 10:00:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:33,363 INFO L495 AbstractCegarLoop]: Abstraction has 7956 states and 11679 transitions. [2022-12-14 10:00:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-12-14 10:00:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11679 transitions. [2022-12-14 10:00:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:00:33,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:33,363 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] [2022-12-14 10:00:33,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:00:33,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:33,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash 281865989, now seen corresponding path program 1 times [2022-12-14 10:00:33,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:33,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83830895] [2022-12-14 10:00:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:33,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:34,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83830895] [2022-12-14 10:00:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83830895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:34,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:34,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-14 10:00:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126600536] [2022-12-14 10:00:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:00:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:00:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:00:34,417 INFO L87 Difference]: Start difference. First operand 7956 states and 11679 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:37,146 INFO L93 Difference]: Finished difference Result 15362 states and 22455 transitions. [2022-12-14 10:00:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:00:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 10:00:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:37,198 INFO L225 Difference]: With dead ends: 15362 [2022-12-14 10:00:37,198 INFO L226 Difference]: Without dead ends: 15360 [2022-12-14 10:00:37,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:00:37,203 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 889 mSDsluCounter, 2263 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:37,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 2513 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:00:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15360 states. [2022-12-14 10:00:38,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15360 to 12609. [2022-12-14 10:00:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12609 states, 12608 states have (on average 1.460977157360406) internal successors, (18420), 12608 states have internal predecessors, (18420), 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) [2022-12-14 10:00:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12609 states to 12609 states and 18420 transitions. [2022-12-14 10:00:38,683 INFO L78 Accepts]: Start accepts. Automaton has 12609 states and 18420 transitions. Word has length 69 [2022-12-14 10:00:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:38,683 INFO L495 AbstractCegarLoop]: Abstraction has 12609 states and 18420 transitions. [2022-12-14 10:00:38,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 12609 states and 18420 transitions. [2022-12-14 10:00:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:00:38,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:38,684 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] [2022-12-14 10:00:38,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 10:00:38,684 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:38,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1396919579, now seen corresponding path program 1 times [2022-12-14 10:00:38,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:38,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883905113] [2022-12-14 10:00:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:39,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:39,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883905113] [2022-12-14 10:00:39,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883905113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:39,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:39,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-14 10:00:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338896266] [2022-12-14 10:00:39,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:39,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:00:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:39,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:00:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:00:39,622 INFO L87 Difference]: Start difference. First operand 12609 states and 18420 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:41,977 INFO L93 Difference]: Finished difference Result 17818 states and 25960 transitions. [2022-12-14 10:00:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:00:41,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 10:00:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:41,999 INFO L225 Difference]: With dead ends: 17818 [2022-12-14 10:00:42,000 INFO L226 Difference]: Without dead ends: 15832 [2022-12-14 10:00:42,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:00:42,004 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 829 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:42,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 2401 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:00:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15832 states. [2022-12-14 10:00:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15832 to 14421. [2022-12-14 10:00:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14421 states, 14420 states have (on average 1.4582524271844661) internal successors, (21028), 14420 states have internal predecessors, (21028), 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) [2022-12-14 10:00:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14421 states to 14421 states and 21028 transitions. [2022-12-14 10:00:43,564 INFO L78 Accepts]: Start accepts. Automaton has 14421 states and 21028 transitions. Word has length 69 [2022-12-14 10:00:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:43,565 INFO L495 AbstractCegarLoop]: Abstraction has 14421 states and 21028 transitions. [2022-12-14 10:00:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 14421 states and 21028 transitions. [2022-12-14 10:00:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:00:43,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:43,566 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] [2022-12-14 10:00:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:00:43,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:43,566 INFO L85 PathProgramCache]: Analyzing trace with hash -864043323, now seen corresponding path program 1 times [2022-12-14 10:00:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:43,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19866839] [2022-12-14 10:00:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:44,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:44,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19866839] [2022-12-14 10:00:44,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19866839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:44,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:44,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-14 10:00:44,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020718411] [2022-12-14 10:00:44,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:44,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:00:44,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:00:44,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:00:44,296 INFO L87 Difference]: Start difference. First operand 14421 states and 21028 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:47,313 INFO L93 Difference]: Finished difference Result 17568 states and 25540 transitions. [2022-12-14 10:00:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:00:47,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 10:00:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:47,335 INFO L225 Difference]: With dead ends: 17568 [2022-12-14 10:00:47,336 INFO L226 Difference]: Without dead ends: 17566 [2022-12-14 10:00:47,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:00:47,339 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 789 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:47,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 2445 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:00:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17566 states. [2022-12-14 10:00:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17566 to 14439. [2022-12-14 10:00:48,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14439 states, 14438 states have (on average 1.4578196426097798) internal successors, (21048), 14438 states have internal predecessors, (21048), 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) [2022-12-14 10:00:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14439 states to 14439 states and 21048 transitions. [2022-12-14 10:00:48,827 INFO L78 Accepts]: Start accepts. Automaton has 14439 states and 21048 transitions. Word has length 69 [2022-12-14 10:00:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:48,827 INFO L495 AbstractCegarLoop]: Abstraction has 14439 states and 21048 transitions. [2022-12-14 10:00:48,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 14439 states and 21048 transitions. [2022-12-14 10:00:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:00:48,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:48,828 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] [2022-12-14 10:00:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:00:48,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1059032283, now seen corresponding path program 1 times [2022-12-14 10:00:48,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:48,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579448648] [2022-12-14 10:00:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:49,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579448648] [2022-12-14 10:00:49,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579448648] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:49,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:49,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-14 10:00:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999314355] [2022-12-14 10:00:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:49,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 10:00:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 10:00:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:00:49,605 INFO L87 Difference]: Start difference. First operand 14439 states and 21048 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:00:52,910 INFO L93 Difference]: Finished difference Result 25149 states and 36679 transitions. [2022-12-14 10:00:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:00:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 10:00:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:00:52,937 INFO L225 Difference]: With dead ends: 25149 [2022-12-14 10:00:52,937 INFO L226 Difference]: Without dead ends: 23163 [2022-12-14 10:00:52,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:00:52,944 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 902 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:00:52,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1726 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:00:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23163 states. [2022-12-14 10:00:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23163 to 17868. [2022-12-14 10:00:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17868 states, 17867 states have (on average 1.4546370403537248) internal successors, (25990), 17867 states have internal predecessors, (25990), 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) [2022-12-14 10:00:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17868 states to 17868 states and 25990 transitions. [2022-12-14 10:00:55,006 INFO L78 Accepts]: Start accepts. Automaton has 17868 states and 25990 transitions. Word has length 69 [2022-12-14 10:00:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:00:55,006 INFO L495 AbstractCegarLoop]: Abstraction has 17868 states and 25990 transitions. [2022-12-14 10:00:55,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:00:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 17868 states and 25990 transitions. [2022-12-14 10:00:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 10:00:55,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:00:55,008 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] [2022-12-14 10:00:55,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 10:00:55,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:00:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:00:55,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1126645573, now seen corresponding path program 1 times [2022-12-14 10:00:55,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:00:55,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376986019] [2022-12-14 10:00:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:00:55,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:00:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:00:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:00:55,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:00:55,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376986019] [2022-12-14 10:00:55,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376986019] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:00:55,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:00:55,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-14 10:00:55,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840352939] [2022-12-14 10:00:55,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:00:55,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 10:00:55,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:00:55,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 10:00:55,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:00:55,774 INFO L87 Difference]: Start difference. First operand 17868 states and 25990 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:00,866 INFO L93 Difference]: Finished difference Result 32860 states and 47906 transitions. [2022-12-14 10:01:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:01:00,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-12-14 10:01:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:00,908 INFO L225 Difference]: With dead ends: 32860 [2022-12-14 10:01:00,908 INFO L226 Difference]: Without dead ends: 30874 [2022-12-14 10:01:00,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:01:00,920 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 867 mSDsluCounter, 2204 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:00,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 2545 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:01:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30874 states. [2022-12-14 10:01:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30874 to 19396. [2022-12-14 10:01:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19396 states, 19395 states have (on average 1.454189224026811) internal successors, (28204), 19395 states have internal predecessors, (28204), 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) [2022-12-14 10:01:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19396 states to 19396 states and 28204 transitions. [2022-12-14 10:01:03,481 INFO L78 Accepts]: Start accepts. Automaton has 19396 states and 28204 transitions. Word has length 69 [2022-12-14 10:01:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:03,481 INFO L495 AbstractCegarLoop]: Abstraction has 19396 states and 28204 transitions. [2022-12-14 10:01:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:01:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 19396 states and 28204 transitions. [2022-12-14 10:01:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:01:03,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:03,482 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] [2022-12-14 10:01:03,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:01:03,482 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:03,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1724107097, now seen corresponding path program 1 times [2022-12-14 10:01:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182871127] [2022-12-14 10:01:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:04,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:04,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182871127] [2022-12-14 10:01:04,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182871127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:04,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:01:04,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-12-14 10:01:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722922738] [2022-12-14 10:01:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 10:01:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 10:01:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:01:04,818 INFO L87 Difference]: Start difference. First operand 19396 states and 28204 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2022-12-14 10:01:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:09,941 INFO L93 Difference]: Finished difference Result 27012 states and 39197 transitions. [2022-12-14 10:01:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 10:01:09,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:01:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:09,969 INFO L225 Difference]: With dead ends: 27012 [2022-12-14 10:01:09,969 INFO L226 Difference]: Without dead ends: 25058 [2022-12-14 10:01:09,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=1167, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 10:01:09,975 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 881 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:09,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 2217 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 10:01:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25058 states. [2022-12-14 10:01:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25058 to 19421. [2022-12-14 10:01:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19421 states, 19420 states have (on average 1.4538105046343974) internal successors, (28233), 19420 states have internal predecessors, (28233), 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) [2022-12-14 10:01:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19421 states to 19421 states and 28233 transitions. [2022-12-14 10:01:12,466 INFO L78 Accepts]: Start accepts. Automaton has 19421 states and 28233 transitions. Word has length 71 [2022-12-14 10:01:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:12,466 INFO L495 AbstractCegarLoop]: Abstraction has 19421 states and 28233 transitions. [2022-12-14 10:01:12,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2022-12-14 10:01:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 19421 states and 28233 transitions. [2022-12-14 10:01:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:01:12,467 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:12,467 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] [2022-12-14 10:01:12,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:01:12,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2037983943, now seen corresponding path program 1 times [2022-12-14 10:01:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:12,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207835014] [2022-12-14 10:01:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:12,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:13,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:13,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207835014] [2022-12-14 10:01:13,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207835014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:13,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:01:13,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-12-14 10:01:13,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742002166] [2022-12-14 10:01:13,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:13,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:01:13,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:13,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:01:13,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:01:13,891 INFO L87 Difference]: Start difference. First operand 19421 states and 28233 transitions. Second operand has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 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) [2022-12-14 10:01:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:19,196 INFO L93 Difference]: Finished difference Result 24825 states and 35988 transitions. [2022-12-14 10:01:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 10:01:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:01:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:19,222 INFO L225 Difference]: With dead ends: 24825 [2022-12-14 10:01:19,222 INFO L226 Difference]: Without dead ends: 24823 [2022-12-14 10:01:19,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=400, Invalid=1670, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 10:01:19,228 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1571 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1902 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:19,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 1902 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 10:01:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24823 states. [2022-12-14 10:01:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24823 to 19421. [2022-12-14 10:01:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19421 states, 19420 states have (on average 1.4538105046343974) internal successors, (28233), 19420 states have internal predecessors, (28233), 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) [2022-12-14 10:01:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19421 states to 19421 states and 28233 transitions. [2022-12-14 10:01:21,795 INFO L78 Accepts]: Start accepts. Automaton has 19421 states and 28233 transitions. Word has length 71 [2022-12-14 10:01:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:21,795 INFO L495 AbstractCegarLoop]: Abstraction has 19421 states and 28233 transitions. [2022-12-14 10:01:21,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.730769230769231) internal successors, (71), 25 states have internal predecessors, (71), 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) [2022-12-14 10:01:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19421 states and 28233 transitions. [2022-12-14 10:01:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:01:21,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:21,797 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] [2022-12-14 10:01:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:01:21,797 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash -443211495, now seen corresponding path program 1 times [2022-12-14 10:01:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:21,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858656216] [2022-12-14 10:01:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:22,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:22,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858656216] [2022-12-14 10:01:22,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858656216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:22,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:01:22,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-14 10:01:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137643339] [2022-12-14 10:01:22,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:22,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 10:01:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 10:01:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:01:22,639 INFO L87 Difference]: Start difference. First operand 19421 states and 28233 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2022-12-14 10:01:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:26,836 INFO L93 Difference]: Finished difference Result 24554 states and 35582 transitions. [2022-12-14 10:01:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:01:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:01:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:26,860 INFO L225 Difference]: With dead ends: 24554 [2022-12-14 10:01:26,861 INFO L226 Difference]: Without dead ends: 24552 [2022-12-14 10:01:26,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:01:26,866 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 799 mSDsluCounter, 2929 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 3342 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:26,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 3342 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:01:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24552 states. [2022-12-14 10:01:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24552 to 20418. [2022-12-14 10:01:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20418 states, 20417 states have (on average 1.4520742518489493) internal successors, (29647), 20417 states have internal predecessors, (29647), 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) [2022-12-14 10:01:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20418 states to 20418 states and 29647 transitions. [2022-12-14 10:01:29,704 INFO L78 Accepts]: Start accepts. Automaton has 20418 states and 29647 transitions. Word has length 71 [2022-12-14 10:01:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:29,705 INFO L495 AbstractCegarLoop]: Abstraction has 20418 states and 29647 transitions. [2022-12-14 10:01:29,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2022-12-14 10:01:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20418 states and 29647 transitions. [2022-12-14 10:01:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:01:29,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:29,706 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] [2022-12-14 10:01:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:01:29,706 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1005125223, now seen corresponding path program 1 times [2022-12-14 10:01:29,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:29,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510897385] [2022-12-14 10:01:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:29,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:30,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:30,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510897385] [2022-12-14 10:01:30,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510897385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:30,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:01:30,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-14 10:01:30,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387495458] [2022-12-14 10:01:30,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:30,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:01:30,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:01:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:01:30,576 INFO L87 Difference]: Start difference. First operand 20418 states and 29647 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2022-12-14 10:01:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:35,335 INFO L93 Difference]: Finished difference Result 32534 states and 47263 transitions. [2022-12-14 10:01:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:01:35,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:01:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:35,364 INFO L225 Difference]: With dead ends: 32534 [2022-12-14 10:01:35,364 INFO L226 Difference]: Without dead ends: 24916 [2022-12-14 10:01:35,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:01:35,373 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 931 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:35,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 2475 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:01:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24916 states. [2022-12-14 10:01:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24916 to 21240. [2022-12-14 10:01:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21240 states, 21239 states have (on average 1.4490324403220491) internal successors, (30776), 21239 states have internal predecessors, (30776), 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) [2022-12-14 10:01:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21240 states to 21240 states and 30776 transitions. [2022-12-14 10:01:39,029 INFO L78 Accepts]: Start accepts. Automaton has 21240 states and 30776 transitions. Word has length 71 [2022-12-14 10:01:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:39,030 INFO L495 AbstractCegarLoop]: Abstraction has 21240 states and 30776 transitions. [2022-12-14 10:01:39,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2022-12-14 10:01:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 21240 states and 30776 transitions. [2022-12-14 10:01:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:01:39,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:39,031 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] [2022-12-14 10:01:39,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 10:01:39,031 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2143932761, now seen corresponding path program 1 times [2022-12-14 10:01:39,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:39,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21958815] [2022-12-14 10:01:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:39,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:40,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:40,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21958815] [2022-12-14 10:01:40,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21958815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:40,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:01:40,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-12-14 10:01:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117260777] [2022-12-14 10:01:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 10:01:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 10:01:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:01:40,294 INFO L87 Difference]: Start difference. First operand 21240 states and 30776 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2022-12-14 10:01:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:01:51,775 INFO L93 Difference]: Finished difference Result 48573 states and 70524 transitions. [2022-12-14 10:01:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:01:51,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:01:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:01:51,835 INFO L225 Difference]: With dead ends: 48573 [2022-12-14 10:01:51,835 INFO L226 Difference]: Without dead ends: 48571 [2022-12-14 10:01:51,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 10:01:51,849 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1443 mSDsluCounter, 3338 mSDsCounter, 0 mSdLazyCounter, 3921 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 3672 SdHoareTripleChecker+Invalid, 3930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:01:51,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 3672 Invalid, 3930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3921 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 10:01:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48571 states. [2022-12-14 10:01:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48571 to 24650. [2022-12-14 10:01:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24650 states, 24649 states have (on average 1.4506470850744453) internal successors, (35757), 24649 states have internal predecessors, (35757), 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) [2022-12-14 10:01:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24650 states to 24650 states and 35757 transitions. [2022-12-14 10:01:56,040 INFO L78 Accepts]: Start accepts. Automaton has 24650 states and 35757 transitions. Word has length 71 [2022-12-14 10:01:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:01:56,040 INFO L495 AbstractCegarLoop]: Abstraction has 24650 states and 35757 transitions. [2022-12-14 10:01:56,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 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) [2022-12-14 10:01:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 24650 states and 35757 transitions. [2022-12-14 10:01:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:01:56,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:01:56,041 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] [2022-12-14 10:01:56,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 10:01:56,041 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:01:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:01:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -807713351, now seen corresponding path program 1 times [2022-12-14 10:01:56,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:01:56,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40562652] [2022-12-14 10:01:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:01:56,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:01:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:01:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:01:57,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:01:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40562652] [2022-12-14 10:01:57,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40562652] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:01:57,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:01:57,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 10:01:57,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808949218] [2022-12-14 10:01:57,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:01:57,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:01:57,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:01:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:01:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:01:57,361 INFO L87 Difference]: Start difference. First operand 24650 states and 35757 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 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) [2022-12-14 10:02:07,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:07,643 INFO L93 Difference]: Finished difference Result 42850 states and 62097 transitions. [2022-12-14 10:02:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:02:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:02:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:07,689 INFO L225 Difference]: With dead ends: 42850 [2022-12-14 10:02:07,689 INFO L226 Difference]: Without dead ends: 40864 [2022-12-14 10:02:07,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 10:02:07,699 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 1401 mSDsluCounter, 2544 mSDsCounter, 0 mSdLazyCounter, 3091 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 2749 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:07,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 2749 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3091 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 10:02:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40864 states. [2022-12-14 10:02:12,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40864 to 24673. [2022-12-14 10:02:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24673 states, 24672 states have (on average 1.4503891050583657) internal successors, (35784), 24672 states have internal predecessors, (35784), 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) [2022-12-14 10:02:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24673 states to 24673 states and 35784 transitions. [2022-12-14 10:02:12,256 INFO L78 Accepts]: Start accepts. Automaton has 24673 states and 35784 transitions. Word has length 71 [2022-12-14 10:02:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:12,256 INFO L495 AbstractCegarLoop]: Abstraction has 24673 states and 35784 transitions. [2022-12-14 10:02:12,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 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) [2022-12-14 10:02:12,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24673 states and 35784 transitions. [2022-12-14 10:02:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:02:12,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:12,257 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] [2022-12-14 10:02:12,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 10:02:12,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:02:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1953622663, now seen corresponding path program 1 times [2022-12-14 10:02:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:12,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943182064] [2022-12-14 10:02:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:13,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943182064] [2022-12-14 10:02:13,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943182064] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:02:13,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:02:13,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-14 10:02:13,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472093020] [2022-12-14 10:02:13,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:02:13,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 10:02:13,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:13,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 10:02:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:02:13,020 INFO L87 Difference]: Start difference. First operand 24673 states and 35784 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2022-12-14 10:02:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:22,097 INFO L93 Difference]: Finished difference Result 43194 states and 62756 transitions. [2022-12-14 10:02:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 10:02:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:02:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:22,148 INFO L225 Difference]: With dead ends: 43194 [2022-12-14 10:02:22,148 INFO L226 Difference]: Without dead ends: 43192 [2022-12-14 10:02:22,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:02:22,157 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 828 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:22,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 3383 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:02:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43192 states. [2022-12-14 10:02:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43192 to 26195. [2022-12-14 10:02:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26195 states, 26194 states have (on average 1.4515156142628083) internal successors, (38021), 26194 states have internal predecessors, (38021), 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) [2022-12-14 10:02:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26195 states to 26195 states and 38021 transitions. [2022-12-14 10:02:27,285 INFO L78 Accepts]: Start accepts. Automaton has 26195 states and 38021 transitions. Word has length 71 [2022-12-14 10:02:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:27,286 INFO L495 AbstractCegarLoop]: Abstraction has 26195 states and 38021 transitions. [2022-12-14 10:02:27,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 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) [2022-12-14 10:02:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26195 states and 38021 transitions. [2022-12-14 10:02:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 10:02:27,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:27,287 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] [2022-12-14 10:02:27,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 10:02:27,287 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:02:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2146355673, now seen corresponding path program 1 times [2022-12-14 10:02:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:27,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741208834] [2022-12-14 10:02:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:27,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:28,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:28,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741208834] [2022-12-14 10:02:28,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741208834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:02:28,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:02:28,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-14 10:02:28,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761647172] [2022-12-14 10:02:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:02:28,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:02:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:02:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:02:28,189 INFO L87 Difference]: Start difference. First operand 26195 states and 38021 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2022-12-14 10:02:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:37,559 INFO L93 Difference]: Finished difference Result 42134 states and 61184 transitions. [2022-12-14 10:02:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:02:37,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-14 10:02:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:37,606 INFO L225 Difference]: With dead ends: 42134 [2022-12-14 10:02:37,606 INFO L226 Difference]: Without dead ends: 40148 [2022-12-14 10:02:37,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:02:37,614 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 806 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:37,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 2279 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 10:02:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40148 states. [2022-12-14 10:02:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40148 to 26199. [2022-12-14 10:02:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26199 states, 26198 states have (on average 1.4515230170242004) internal successors, (38027), 26198 states have internal predecessors, (38027), 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) [2022-12-14 10:02:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26199 states to 26199 states and 38027 transitions. [2022-12-14 10:02:42,976 INFO L78 Accepts]: Start accepts. Automaton has 26199 states and 38027 transitions. Word has length 71 [2022-12-14 10:02:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:42,976 INFO L495 AbstractCegarLoop]: Abstraction has 26199 states and 38027 transitions. [2022-12-14 10:02:42,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 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) [2022-12-14 10:02:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 26199 states and 38027 transitions. [2022-12-14 10:02:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 10:02:42,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:42,977 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] [2022-12-14 10:02:42,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 10:02:42,978 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:02:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:42,978 INFO L85 PathProgramCache]: Analyzing trace with hash 134002229, now seen corresponding path program 1 times [2022-12-14 10:02:42,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:42,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136501076] [2022-12-14 10:02:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:42,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:43,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136501076] [2022-12-14 10:02:43,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136501076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:02:43,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:02:43,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:02:43,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734668991] [2022-12-14 10:02:43,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:02:43,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:02:43,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:02:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:02:43,007 INFO L87 Difference]: Start difference. First operand 26199 states and 38027 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:47,601 INFO L93 Difference]: Finished difference Result 45847 states and 66673 transitions. [2022-12-14 10:02:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:02:47,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-14 10:02:47,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:47,623 INFO L225 Difference]: With dead ends: 45847 [2022-12-14 10:02:47,623 INFO L226 Difference]: Without dead ends: 20993 [2022-12-14 10:02:47,639 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 [2022-12-14 10:02:47,639 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 138 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:47,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 366 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:02:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20993 states. [2022-12-14 10:02:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20993 to 20717. [2022-12-14 10:02:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20717 states, 20716 states have (on average 1.4471423054643753) internal successors, (29979), 20716 states have internal predecessors, (29979), 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) [2022-12-14 10:02:51,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20717 states to 20717 states and 29979 transitions. [2022-12-14 10:02:51,991 INFO L78 Accepts]: Start accepts. Automaton has 20717 states and 29979 transitions. Word has length 72 [2022-12-14 10:02:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:02:51,991 INFO L495 AbstractCegarLoop]: Abstraction has 20717 states and 29979 transitions. [2022-12-14 10:02:51,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 20717 states and 29979 transitions. [2022-12-14 10:02:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 10:02:51,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:02:51,993 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] [2022-12-14 10:02:51,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 10:02:51,993 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:02:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:02:51,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1595693213, now seen corresponding path program 1 times [2022-12-14 10:02:51,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:02:51,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267509593] [2022-12-14 10:02:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:02:51,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:02:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:02:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:02:52,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:02:52,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267509593] [2022-12-14 10:02:52,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267509593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:02:52,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:02:52,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:02:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727138051] [2022-12-14 10:02:52,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:02:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:02:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:02:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:02:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:02:52,019 INFO L87 Difference]: Start difference. First operand 20717 states and 29979 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:02:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:02:56,355 INFO L93 Difference]: Finished difference Result 35078 states and 50950 transitions. [2022-12-14 10:02:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:02:56,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-14 10:02:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:02:56,376 INFO L225 Difference]: With dead ends: 35078 [2022-12-14 10:02:56,376 INFO L226 Difference]: Without dead ends: 20076 [2022-12-14 10:02:56,388 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 [2022-12-14 10:02:56,388 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 141 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:02:56,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 364 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:02:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20076 states. [2022-12-14 10:03:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20076 to 20074. [2022-12-14 10:03:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20074 states, 20073 states have (on average 1.445772928809844) internal successors, (29021), 20073 states have internal predecessors, (29021), 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) [2022-12-14 10:03:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20074 states to 20074 states and 29021 transitions. [2022-12-14 10:03:00,709 INFO L78 Accepts]: Start accepts. Automaton has 20074 states and 29021 transitions. Word has length 72 [2022-12-14 10:03:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:00,710 INFO L495 AbstractCegarLoop]: Abstraction has 20074 states and 29021 transitions. [2022-12-14 10:03:00,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 20074 states and 29021 transitions. [2022-12-14 10:03:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 10:03:00,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:00,711 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] [2022-12-14 10:03:00,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 10:03:00,711 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 209650118, now seen corresponding path program 1 times [2022-12-14 10:03:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:00,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216282645] [2022-12-14 10:03:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:00,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216282645] [2022-12-14 10:03:00,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216282645] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:00,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:00,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:00,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880438287] [2022-12-14 10:03:00,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:00,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:00,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:00,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:00,739 INFO L87 Difference]: Start difference. First operand 20074 states and 29021 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:04,991 INFO L93 Difference]: Finished difference Result 35115 states and 50922 transitions. [2022-12-14 10:03:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-14 10:03:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:05,011 INFO L225 Difference]: With dead ends: 35115 [2022-12-14 10:03:05,011 INFO L226 Difference]: Without dead ends: 19393 [2022-12-14 10:03:05,022 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 [2022-12-14 10:03:05,023 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 140 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:05,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 356 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:03:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2022-12-14 10:03:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 19391. [2022-12-14 10:03:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19391 states, 19390 states have (on average 1.4444559051057246) internal successors, (28008), 19390 states have internal predecessors, (28008), 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) [2022-12-14 10:03:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19391 states to 19391 states and 28008 transitions. [2022-12-14 10:03:09,222 INFO L78 Accepts]: Start accepts. Automaton has 19391 states and 28008 transitions. Word has length 72 [2022-12-14 10:03:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:09,222 INFO L495 AbstractCegarLoop]: Abstraction has 19391 states and 28008 transitions. [2022-12-14 10:03:09,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 19391 states and 28008 transitions. [2022-12-14 10:03:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 10:03:09,223 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:09,223 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] [2022-12-14 10:03:09,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 10:03:09,223 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1176192105, now seen corresponding path program 1 times [2022-12-14 10:03:09,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:09,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635514829] [2022-12-14 10:03:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:09,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:09,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:09,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635514829] [2022-12-14 10:03:09,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635514829] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:09,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:09,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:03:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209406495] [2022-12-14 10:03:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:03:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:09,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:03:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:03:09,248 INFO L87 Difference]: Start difference. First operand 19391 states and 28008 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:13,409 INFO L93 Difference]: Finished difference Result 33316 states and 48243 transitions. [2022-12-14 10:03:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:03:13,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-14 10:03:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:13,427 INFO L225 Difference]: With dead ends: 33316 [2022-12-14 10:03:13,427 INFO L226 Difference]: Without dead ends: 18668 [2022-12-14 10:03:13,437 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 [2022-12-14 10:03:13,437 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 139 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:13,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 348 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:03:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18668 states. [2022-12-14 10:03:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18668 to 18666. [2022-12-14 10:03:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18666 states, 18665 states have (on average 1.4425930886686311) internal successors, (26926), 18665 states have internal predecessors, (26926), 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) [2022-12-14 10:03:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18666 states to 18666 states and 26926 transitions. [2022-12-14 10:03:17,489 INFO L78 Accepts]: Start accepts. Automaton has 18666 states and 26926 transitions. Word has length 72 [2022-12-14 10:03:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:17,489 INFO L495 AbstractCegarLoop]: Abstraction has 18666 states and 26926 transitions. [2022-12-14 10:03:17,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:03:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 18666 states and 26926 transitions. [2022-12-14 10:03:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:03:17,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:17,490 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] [2022-12-14 10:03:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 10:03:17,491 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:17,491 INFO L85 PathProgramCache]: Analyzing trace with hash 976251533, now seen corresponding path program 1 times [2022-12-14 10:03:17,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:17,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405453949] [2022-12-14 10:03:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:20,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:20,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405453949] [2022-12-14 10:03:20,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405453949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:20,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:20,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-12-14 10:03:20,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337114173] [2022-12-14 10:03:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:20,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:03:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:03:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:03:20,065 INFO L87 Difference]: Start difference. First operand 18666 states and 26926 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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) [2022-12-14 10:03:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:30,869 INFO L93 Difference]: Finished difference Result 21567 states and 31056 transitions. [2022-12-14 10:03:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 10:03:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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 73 [2022-12-14 10:03:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:30,889 INFO L225 Difference]: With dead ends: 21567 [2022-12-14 10:03:30,890 INFO L226 Difference]: Without dead ends: 21565 [2022-12-14 10:03:30,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=607, Invalid=2585, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 10:03:30,894 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1173 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 5416 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 5426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 5416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:30,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1173 Valid, 3547 Invalid, 5426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 5416 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 10:03:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21565 states. [2022-12-14 10:03:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21565 to 18666. [2022-12-14 10:03:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18666 states, 18665 states have (on average 1.4425930886686311) internal successors, (26926), 18665 states have internal predecessors, (26926), 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) [2022-12-14 10:03:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18666 states to 18666 states and 26926 transitions. [2022-12-14 10:03:35,221 INFO L78 Accepts]: Start accepts. Automaton has 18666 states and 26926 transitions. Word has length 73 [2022-12-14 10:03:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:35,221 INFO L495 AbstractCegarLoop]: Abstraction has 18666 states and 26926 transitions. [2022-12-14 10:03:35,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 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) [2022-12-14 10:03:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 18666 states and 26926 transitions. [2022-12-14 10:03:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:03:35,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:35,222 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] [2022-12-14 10:03:35,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 10:03:35,222 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1876133613, now seen corresponding path program 1 times [2022-12-14 10:03:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:35,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869963229] [2022-12-14 10:03:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:35,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:37,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869963229] [2022-12-14 10:03:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869963229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:37,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:37,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-12-14 10:03:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468129419] [2022-12-14 10:03:37,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 10:03:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 10:03:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-12-14 10:03:37,358 INFO L87 Difference]: Start difference. First operand 18666 states and 26926 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-12-14 10:03:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:47,521 INFO L93 Difference]: Finished difference Result 26344 states and 37998 transitions. [2022-12-14 10:03:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 10:03:47,522 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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 73 [2022-12-14 10:03:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:03:47,547 INFO L225 Difference]: With dead ends: 26344 [2022-12-14 10:03:47,547 INFO L226 Difference]: Without dead ends: 24550 [2022-12-14 10:03:47,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=467, Invalid=1983, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 10:03:47,553 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1480 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 3220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 3036 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:03:47,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 3036 Invalid, 3227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3220 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 10:03:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24550 states. [2022-12-14 10:03:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24550 to 18666. [2022-12-14 10:03:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18666 states, 18665 states have (on average 1.4425930886686311) internal successors, (26926), 18665 states have internal predecessors, (26926), 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) [2022-12-14 10:03:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18666 states to 18666 states and 26926 transitions. [2022-12-14 10:03:51,972 INFO L78 Accepts]: Start accepts. Automaton has 18666 states and 26926 transitions. Word has length 73 [2022-12-14 10:03:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:03:51,972 INFO L495 AbstractCegarLoop]: Abstraction has 18666 states and 26926 transitions. [2022-12-14 10:03:51,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-12-14 10:03:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 18666 states and 26926 transitions. [2022-12-14 10:03:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:03:51,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:03:51,973 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] [2022-12-14 10:03:51,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 10:03:51,973 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:03:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:03:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1885957427, now seen corresponding path program 1 times [2022-12-14 10:03:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:03:51,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677147625] [2022-12-14 10:03:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:03:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:03:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:03:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:03:52,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:03:52,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677147625] [2022-12-14 10:03:52,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677147625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:03:52,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:03:52,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-12-14 10:03:52,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345530960] [2022-12-14 10:03:52,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:03:52,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:03:52,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:03:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:03:52,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:03:52,855 INFO L87 Difference]: Start difference. First operand 18666 states and 26926 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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) [2022-12-14 10:03:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:03:59,999 INFO L93 Difference]: Finished difference Result 23358 states and 33601 transitions. [2022-12-14 10:04:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:04:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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 73 [2022-12-14 10:04:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:00,022 INFO L225 Difference]: With dead ends: 23358 [2022-12-14 10:04:00,022 INFO L226 Difference]: Without dead ends: 23356 [2022-12-14 10:04:00,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:04:00,026 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 974 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:00,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1703 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1958 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:04:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23356 states. [2022-12-14 10:04:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23356 to 18665. [2022-12-14 10:04:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18665 states, 18664 states have (on average 1.4425632233176169) internal successors, (26924), 18664 states have internal predecessors, (26924), 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) [2022-12-14 10:04:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18665 states to 18665 states and 26924 transitions. [2022-12-14 10:04:04,490 INFO L78 Accepts]: Start accepts. Automaton has 18665 states and 26924 transitions. Word has length 73 [2022-12-14 10:04:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:04,491 INFO L495 AbstractCegarLoop]: Abstraction has 18665 states and 26924 transitions. [2022-12-14 10:04:04,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 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) [2022-12-14 10:04:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 18665 states and 26924 transitions. [2022-12-14 10:04:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:04:04,491 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:04,491 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] [2022-12-14 10:04:04,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 10:04:04,492 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -291184979, now seen corresponding path program 1 times [2022-12-14 10:04:04,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932544822] [2022-12-14 10:04:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:04,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:05,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932544822] [2022-12-14 10:04:05,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932544822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:05,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:04:05,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 10:04:05,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677897985] [2022-12-14 10:04:05,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:05,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:04:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:04:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:04:05,565 INFO L87 Difference]: Start difference. First operand 18665 states and 26924 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-12-14 10:04:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:14,422 INFO L93 Difference]: Finished difference Result 24235 states and 34848 transitions. [2022-12-14 10:04:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:04:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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 73 [2022-12-14 10:04:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:14,446 INFO L225 Difference]: With dead ends: 24235 [2022-12-14 10:04:14,446 INFO L226 Difference]: Without dead ends: 24233 [2022-12-14 10:04:14,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=367, Invalid=1525, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:04:14,450 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 985 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:14,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 2658 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 10:04:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24233 states. [2022-12-14 10:04:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24233 to 18668. [2022-12-14 10:04:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.4424920983553866) internal successors, (26927), 18667 states have internal predecessors, (26927), 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) [2022-12-14 10:04:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 26927 transitions. [2022-12-14 10:04:19,040 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 26927 transitions. Word has length 73 [2022-12-14 10:04:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:19,040 INFO L495 AbstractCegarLoop]: Abstraction has 18668 states and 26927 transitions. [2022-12-14 10:04:19,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-12-14 10:04:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 26927 transitions. [2022-12-14 10:04:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:04:19,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:19,041 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] [2022-12-14 10:04:19,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 10:04:19,041 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1684585715, now seen corresponding path program 1 times [2022-12-14 10:04:19,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:19,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273995061] [2022-12-14 10:04:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:19,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:20,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:20,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273995061] [2022-12-14 10:04:20,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273995061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:20,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:04:20,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 10:04:20,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577304603] [2022-12-14 10:04:20,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:20,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:04:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:04:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:04:20,242 INFO L87 Difference]: Start difference. First operand 18668 states and 26927 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-12-14 10:04:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:28,475 INFO L93 Difference]: Finished difference Result 25348 states and 36505 transitions. [2022-12-14 10:04:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:04:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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 73 [2022-12-14 10:04:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:28,496 INFO L225 Difference]: With dead ends: 25348 [2022-12-14 10:04:28,497 INFO L226 Difference]: Without dead ends: 21762 [2022-12-14 10:04:28,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:04:28,503 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 1184 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 2087 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:28,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 2087 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 10:04:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21762 states. [2022-12-14 10:04:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21762 to 17865. [2022-12-14 10:04:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17865 states, 17864 states have (on average 1.4421182266009853) internal successors, (25762), 17864 states have internal predecessors, (25762), 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) [2022-12-14 10:04:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17865 states to 17865 states and 25762 transitions. [2022-12-14 10:04:33,077 INFO L78 Accepts]: Start accepts. Automaton has 17865 states and 25762 transitions. Word has length 73 [2022-12-14 10:04:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:33,077 INFO L495 AbstractCegarLoop]: Abstraction has 17865 states and 25762 transitions. [2022-12-14 10:04:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-12-14 10:04:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17865 states and 25762 transitions. [2022-12-14 10:04:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:04:33,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:33,078 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] [2022-12-14 10:04:33,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 10:04:33,078 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:33,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1151709459, now seen corresponding path program 1 times [2022-12-14 10:04:33,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:33,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023501568] [2022-12-14 10:04:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:33,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:34,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:34,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023501568] [2022-12-14 10:04:34,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023501568] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:34,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:04:34,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-14 10:04:34,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846140131] [2022-12-14 10:04:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:04:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:04:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:04:34,240 INFO L87 Difference]: Start difference. First operand 17865 states and 25762 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-12-14 10:04:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:46,044 INFO L93 Difference]: Finished difference Result 32534 states and 46862 transitions. [2022-12-14 10:04:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:04:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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 73 [2022-12-14 10:04:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:46,078 INFO L225 Difference]: With dead ends: 32534 [2022-12-14 10:04:46,078 INFO L226 Difference]: Without dead ends: 32532 [2022-12-14 10:04:46,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:04:46,084 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1191 mSDsluCounter, 2954 mSDsCounter, 0 mSdLazyCounter, 3610 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 3620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:46,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 3272 Invalid, 3620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3610 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 10:04:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32532 states. [2022-12-14 10:04:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32532 to 17868. [2022-12-14 10:04:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17868 states, 17867 states have (on average 1.4420999608216265) internal successors, (25766), 17867 states have internal predecessors, (25766), 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) [2022-12-14 10:04:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17868 states to 17868 states and 25766 transitions. [2022-12-14 10:04:50,788 INFO L78 Accepts]: Start accepts. Automaton has 17868 states and 25766 transitions. Word has length 73 [2022-12-14 10:04:50,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:50,788 INFO L495 AbstractCegarLoop]: Abstraction has 17868 states and 25766 transitions. [2022-12-14 10:04:50,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-12-14 10:04:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17868 states and 25766 transitions. [2022-12-14 10:04:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:04:50,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:04:50,789 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] [2022-12-14 10:04:50,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 10:04:50,790 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:04:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:04:50,790 INFO L85 PathProgramCache]: Analyzing trace with hash 443062989, now seen corresponding path program 1 times [2022-12-14 10:04:50,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:04:50,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637039747] [2022-12-14 10:04:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:04:50,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:04:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:04:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:04:52,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:52,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637039747] [2022-12-14 10:04:52,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637039747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:04:52,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:04:52,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-12-14 10:04:52,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174338991] [2022-12-14 10:04:52,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:04:52,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:04:52,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:52,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:04:52,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-12-14 10:04:52,910 INFO L87 Difference]: Start difference. First operand 17868 states and 25766 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 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) [2022-12-14 10:05:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:02,619 INFO L93 Difference]: Finished difference Result 20770 states and 29898 transitions. [2022-12-14 10:05:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 10:05:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 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 73 [2022-12-14 10:05:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:02,641 INFO L225 Difference]: With dead ends: 20770 [2022-12-14 10:05:02,641 INFO L226 Difference]: Without dead ends: 20768 [2022-12-14 10:05:02,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=549, Invalid=2207, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:05:02,645 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 1254 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 4016 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 4022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:02,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 2450 Invalid, 4022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4016 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 10:05:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20768 states. [2022-12-14 10:05:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20768 to 17874. [2022-12-14 10:05:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17874 states, 17873 states have (on average 1.44200749734236) internal successors, (25773), 17873 states have internal predecessors, (25773), 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) [2022-12-14 10:05:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17874 states to 17874 states and 25773 transitions. [2022-12-14 10:05:07,435 INFO L78 Accepts]: Start accepts. Automaton has 17874 states and 25773 transitions. Word has length 73 [2022-12-14 10:05:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:07,436 INFO L495 AbstractCegarLoop]: Abstraction has 17874 states and 25773 transitions. [2022-12-14 10:05:07,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 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) [2022-12-14 10:05:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17874 states and 25773 transitions. [2022-12-14 10:05:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:05:07,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:07,437 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] [2022-12-14 10:05:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-14 10:05:07,437 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:05:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -118850739, now seen corresponding path program 1 times [2022-12-14 10:05:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190994428] [2022-12-14 10:05:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:08,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:05:08,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190994428] [2022-12-14 10:05:08,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190994428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:05:08,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:05:08,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-12-14 10:05:08,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197306481] [2022-12-14 10:05:08,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:05:08,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:05:08,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:08,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:05:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-12-14 10:05:08,733 INFO L87 Difference]: Start difference. First operand 17874 states and 25773 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 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) [2022-12-14 10:05:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:19,191 INFO L93 Difference]: Finished difference Result 30342 states and 43917 transitions. [2022-12-14 10:05:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 10:05:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 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 73 [2022-12-14 10:05:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:19,222 INFO L225 Difference]: With dead ends: 30342 [2022-12-14 10:05:19,222 INFO L226 Difference]: Without dead ends: 26980 [2022-12-14 10:05:19,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 10:05:19,229 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 989 mSDsluCounter, 2410 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:19,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 2812 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 10:05:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26980 states. [2022-12-14 10:05:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26980 to 17858. [2022-12-14 10:05:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17858 states, 17857 states have (on average 1.4423475387803102) internal successors, (25756), 17857 states have internal predecessors, (25756), 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) [2022-12-14 10:05:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17858 states to 17858 states and 25756 transitions. [2022-12-14 10:05:24,437 INFO L78 Accepts]: Start accepts. Automaton has 17858 states and 25756 transitions. Word has length 73 [2022-12-14 10:05:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:24,437 INFO L495 AbstractCegarLoop]: Abstraction has 17858 states and 25756 transitions. [2022-12-14 10:05:24,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 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) [2022-12-14 10:05:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17858 states and 25756 transitions. [2022-12-14 10:05:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 10:05:24,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:24,438 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] [2022-12-14 10:05:24,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 10:05:24,438 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:05:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:24,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1264760051, now seen corresponding path program 1 times [2022-12-14 10:05:24,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:24,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051853875] [2022-12-14 10:05:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:27,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:05:27,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051853875] [2022-12-14 10:05:27,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051853875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:05:27,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:05:27,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-12-14 10:05:27,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260914932] [2022-12-14 10:05:27,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:05:27,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:05:27,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:05:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:05:27,256 INFO L87 Difference]: Start difference. First operand 17858 states and 25756 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 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) [2022-12-14 10:05:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:40,690 INFO L93 Difference]: Finished difference Result 20761 states and 29889 transitions. [2022-12-14 10:05:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 10:05:40,691 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 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 73 [2022-12-14 10:05:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:40,710 INFO L225 Difference]: With dead ends: 20761 [2022-12-14 10:05:40,710 INFO L226 Difference]: Without dead ends: 20759 [2022-12-14 10:05:40,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 10:05:40,714 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1360 mSDsluCounter, 3127 mSDsCounter, 0 mSdLazyCounter, 4393 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 4393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:40,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1360 Valid, 3461 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 4393 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 10:05:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20759 states. [2022-12-14 10:05:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20759 to 17861. [2022-12-14 10:05:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17861 states, 17860 states have (on average 1.4423292273236281) internal successors, (25760), 17860 states have internal predecessors, (25760), 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) [2022-12-14 10:05:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17861 states to 17861 states and 25760 transitions. [2022-12-14 10:05:46,005 INFO L78 Accepts]: Start accepts. Automaton has 17861 states and 25760 transitions. Word has length 73 [2022-12-14 10:05:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:46,005 INFO L495 AbstractCegarLoop]: Abstraction has 17861 states and 25760 transitions. [2022-12-14 10:05:46,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 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) [2022-12-14 10:05:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 17861 states and 25760 transitions. [2022-12-14 10:05:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 10:05:46,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:46,006 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] [2022-12-14 10:05:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 10:05:46,006 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:05:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash 192158284, now seen corresponding path program 1 times [2022-12-14 10:05:46,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:46,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127588268] [2022-12-14 10:05:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:05:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:05:46,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:05:46,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127588268] [2022-12-14 10:05:46,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127588268] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:05:46,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:05:46,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:05:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303739828] [2022-12-14 10:05:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:05:46,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:05:46,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:05:46,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:05:46,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:05:46,031 INFO L87 Difference]: Start difference. First operand 17861 states and 25760 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2022-12-14 10:05:51,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:05:51,175 INFO L93 Difference]: Finished difference Result 34498 states and 49925 transitions. [2022-12-14 10:05:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:05:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-12-14 10:05:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:05:51,193 INFO L225 Difference]: With dead ends: 34498 [2022-12-14 10:05:51,193 INFO L226 Difference]: Without dead ends: 17260 [2022-12-14 10:05:51,204 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 [2022-12-14 10:05:51,204 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 124 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:05:51,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 356 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:05:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17260 states. [2022-12-14 10:05:56,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17260 to 17258. [2022-12-14 10:05:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17258 states, 17257 states have (on average 1.4405168916961233) internal successors, (24859), 17257 states have internal predecessors, (24859), 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) [2022-12-14 10:05:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17258 states to 17258 states and 24859 transitions. [2022-12-14 10:05:56,300 INFO L78 Accepts]: Start accepts. Automaton has 17258 states and 24859 transitions. Word has length 74 [2022-12-14 10:05:56,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:05:56,300 INFO L495 AbstractCegarLoop]: Abstraction has 17258 states and 24859 transitions. [2022-12-14 10:05:56,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2022-12-14 10:05:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 17258 states and 24859 transitions. [2022-12-14 10:05:56,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:05:56,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:05:56,301 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] [2022-12-14 10:05:56,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 10:05:56,301 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:05:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:05:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1044845345, now seen corresponding path program 1 times [2022-12-14 10:05:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:05:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900813424] [2022-12-14 10:05:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:05:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:05:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:00,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900813424] [2022-12-14 10:06:00,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900813424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:00,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:00,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-12-14 10:06:00,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396328338] [2022-12-14 10:06:00,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:00,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 10:06:00,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 10:06:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:06:00,837 INFO L87 Difference]: Start difference. First operand 17258 states and 24859 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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) [2022-12-14 10:06:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:15,227 INFO L93 Difference]: Finished difference Result 20081 states and 28853 transitions. [2022-12-14 10:06:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 10:06:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 75 [2022-12-14 10:06:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:15,246 INFO L225 Difference]: With dead ends: 20081 [2022-12-14 10:06:15,247 INFO L226 Difference]: Without dead ends: 20079 [2022-12-14 10:06:15,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=685, Invalid=2737, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 10:06:15,251 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 932 mSDsluCounter, 2606 mSDsCounter, 0 mSdLazyCounter, 4662 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 2923 SdHoareTripleChecker+Invalid, 4668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:15,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 2923 Invalid, 4668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4662 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 10:06:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20079 states. [2022-12-14 10:06:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20079 to 17258. [2022-12-14 10:06:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17258 states, 17257 states have (on average 1.4405168916961233) internal successors, (24859), 17257 states have internal predecessors, (24859), 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) [2022-12-14 10:06:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17258 states to 17258 states and 24859 transitions. [2022-12-14 10:06:20,340 INFO L78 Accepts]: Start accepts. Automaton has 17258 states and 24859 transitions. Word has length 75 [2022-12-14 10:06:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:20,340 INFO L495 AbstractCegarLoop]: Abstraction has 17258 states and 24859 transitions. [2022-12-14 10:06:20,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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) [2022-12-14 10:06:20,340 INFO L276 IsEmpty]: Start isEmpty. Operand 17258 states and 24859 transitions. [2022-12-14 10:06:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:06:20,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:20,341 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] [2022-12-14 10:06:20,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 10:06:20,341 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:06:20,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2012461247, now seen corresponding path program 1 times [2022-12-14 10:06:20,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:20,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198983289] [2022-12-14 10:06:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:20,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:25,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:25,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198983289] [2022-12-14 10:06:25,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198983289] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:25,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:25,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-12-14 10:06:25,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884616767] [2022-12-14 10:06:25,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 10:06:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 10:06:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:06:25,971 INFO L87 Difference]: Start difference. First operand 17258 states and 24859 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 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) [2022-12-14 10:06:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:42,267 INFO L93 Difference]: Finished difference Result 20052 states and 28825 transitions. [2022-12-14 10:06:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 10:06:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 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 75 [2022-12-14 10:06:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:42,285 INFO L225 Difference]: With dead ends: 20052 [2022-12-14 10:06:42,285 INFO L226 Difference]: Without dead ends: 20050 [2022-12-14 10:06:42,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=997, Invalid=3973, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 10:06:42,289 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1327 mSDsluCounter, 3447 mSDsCounter, 0 mSdLazyCounter, 5805 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 3766 SdHoareTripleChecker+Invalid, 5813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:42,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 3766 Invalid, 5813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5805 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-12-14 10:06:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20050 states. [2022-12-14 10:06:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20050 to 18972. [2022-12-14 10:06:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18972 states, 18971 states have (on average 1.4387222602920247) internal successors, (27294), 18971 states have internal predecessors, (27294), 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) [2022-12-14 10:06:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18972 states to 18972 states and 27294 transitions. [2022-12-14 10:06:47,938 INFO L78 Accepts]: Start accepts. Automaton has 18972 states and 27294 transitions. Word has length 75 [2022-12-14 10:06:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:47,938 INFO L495 AbstractCegarLoop]: Abstraction has 18972 states and 27294 transitions. [2022-12-14 10:06:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 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) [2022-12-14 10:06:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 18972 states and 27294 transitions. [2022-12-14 10:06:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:06:47,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:47,939 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] [2022-12-14 10:06:47,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 10:06:47,939 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:06:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:47,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1112579167, now seen corresponding path program 1 times [2022-12-14 10:06:47,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:06:47,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419634539] [2022-12-14 10:06:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:47,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:06:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:52,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:06:52,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419634539] [2022-12-14 10:06:52,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419634539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:52,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:52,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-12-14 10:06:52,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81871176] [2022-12-14 10:06:52,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:52,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 10:06:52,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:06:52,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 10:06:52,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:06:52,107 INFO L87 Difference]: Start difference. First operand 18972 states and 27294 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 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) [2022-12-14 10:07:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:08,435 INFO L93 Difference]: Finished difference Result 25597 states and 36799 transitions. [2022-12-14 10:07:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 10:07:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 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 75 [2022-12-14 10:07:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:08,458 INFO L225 Difference]: With dead ends: 25597 [2022-12-14 10:07:08,458 INFO L226 Difference]: Without dead ends: 23899 [2022-12-14 10:07:08,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=758, Invalid=2902, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 10:07:08,464 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 934 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 4343 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 4348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:08,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 2768 Invalid, 4348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4343 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 10:07:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23899 states. [2022-12-14 10:07:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23899 to 19759. [2022-12-14 10:07:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19759 states, 19758 states have (on average 1.4395181698552486) internal successors, (28442), 19758 states have internal predecessors, (28442), 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) [2022-12-14 10:07:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19759 states to 19759 states and 28442 transitions. [2022-12-14 10:07:14,426 INFO L78 Accepts]: Start accepts. Automaton has 19759 states and 28442 transitions. Word has length 75 [2022-12-14 10:07:14,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:14,426 INFO L495 AbstractCegarLoop]: Abstraction has 19759 states and 28442 transitions. [2022-12-14 10:07:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 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) [2022-12-14 10:07:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 19759 states and 28442 transitions. [2022-12-14 10:07:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:07:14,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:14,427 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] [2022-12-14 10:07:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-14 10:07:14,427 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:07:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -579702911, now seen corresponding path program 1 times [2022-12-14 10:07:14,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796722620] [2022-12-14 10:07:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:17,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796722620] [2022-12-14 10:07:17,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796722620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:17,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:17,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-12-14 10:07:17,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437396335] [2022-12-14 10:07:17,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:07:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:07:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:07:17,668 INFO L87 Difference]: Start difference. First operand 19759 states and 28442 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2022-12-14 10:07:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:30,765 INFO L93 Difference]: Finished difference Result 22536 states and 32387 transitions. [2022-12-14 10:07:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 10:07:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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 75 [2022-12-14 10:07:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:30,787 INFO L225 Difference]: With dead ends: 22536 [2022-12-14 10:07:30,787 INFO L226 Difference]: Without dead ends: 22534 [2022-12-14 10:07:30,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=601, Invalid=2261, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 10:07:30,791 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1133 mSDsluCounter, 2689 mSDsCounter, 0 mSdLazyCounter, 3998 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 4006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:30,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 3024 Invalid, 4006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3998 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 10:07:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2022-12-14 10:07:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 19755. [2022-12-14 10:07:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19755 states, 19754 states have (on average 1.43955654550977) internal successors, (28437), 19754 states have internal predecessors, (28437), 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) [2022-12-14 10:07:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19755 states to 19755 states and 28437 transitions. [2022-12-14 10:07:36,769 INFO L78 Accepts]: Start accepts. Automaton has 19755 states and 28437 transitions. Word has length 75 [2022-12-14 10:07:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:36,769 INFO L495 AbstractCegarLoop]: Abstraction has 19755 states and 28437 transitions. [2022-12-14 10:07:36,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 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) [2022-12-14 10:07:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 19755 states and 28437 transitions. [2022-12-14 10:07:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 10:07:36,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:36,770 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] [2022-12-14 10:07:36,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-14 10:07:36,770 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:07:36,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1015069537, now seen corresponding path program 1 times [2022-12-14 10:07:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:07:36,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011515448] [2022-12-14 10:07:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:36,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:07:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:40,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:07:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011515448] [2022-12-14 10:07:40,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011515448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:40,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:40,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-12-14 10:07:40,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675942265] [2022-12-14 10:07:40,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:40,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:07:40,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:07:40,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:07:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:07:40,358 INFO L87 Difference]: Start difference. First operand 19755 states and 28437 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 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) [2022-12-14 10:07:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:54,399 INFO L93 Difference]: Finished difference Result 24376 states and 35014 transitions. [2022-12-14 10:07:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 10:07:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 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 75 [2022-12-14 10:07:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:54,423 INFO L225 Difference]: With dead ends: 24376 [2022-12-14 10:07:54,423 INFO L226 Difference]: Without dead ends: 24374 [2022-12-14 10:07:54,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=565, Invalid=2405, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 10:07:54,427 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 1209 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 4296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:54,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 2899 Invalid, 4296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4289 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 10:07:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24374 states. [2022-12-14 10:08:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24374 to 19749. [2022-12-14 10:08:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19749 states, 19748 states have (on average 1.4396394571602187) internal successors, (28430), 19748 states have internal predecessors, (28430), 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) [2022-12-14 10:08:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 28430 transitions. [2022-12-14 10:08:00,499 INFO L78 Accepts]: Start accepts. Automaton has 19749 states and 28430 transitions. Word has length 75 [2022-12-14 10:08:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:00,499 INFO L495 AbstractCegarLoop]: Abstraction has 19749 states and 28430 transitions. [2022-12-14 10:08:00,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 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) [2022-12-14 10:08:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 19749 states and 28430 transitions. [2022-12-14 10:08:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 10:08:00,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:00,500 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] [2022-12-14 10:08:00,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-14 10:08:00,501 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2069982507, now seen corresponding path program 1 times [2022-12-14 10:08:00,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:00,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556918930] [2022-12-14 10:08:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:08,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:08:08,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556918930] [2022-12-14 10:08:08,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556918930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:08:08,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:08:08,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-12-14 10:08:08,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134795632] [2022-12-14 10:08:08,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:08,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 10:08:08,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 10:08:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 10:08:08,758 INFO L87 Difference]: Start difference. First operand 19749 states and 28430 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 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) [2022-12-14 10:08:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:32,358 INFO L93 Difference]: Finished difference Result 22547 states and 32399 transitions. [2022-12-14 10:08:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 10:08:32,359 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 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 77 [2022-12-14 10:08:32,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:32,380 INFO L225 Difference]: With dead ends: 22547 [2022-12-14 10:08:32,380 INFO L226 Difference]: Without dead ends: 22545 [2022-12-14 10:08:32,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1235, Invalid=4927, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 10:08:32,384 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1156 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 6197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 6202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:32,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 2801 Invalid, 6202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6197 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-14 10:08:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22545 states. [2022-12-14 10:08:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22545 to 19737. [2022-12-14 10:08:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19737 states, 19736 states have (on average 1.4399067693554926) internal successors, (28418), 19736 states have internal predecessors, (28418), 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) [2022-12-14 10:08:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 28418 transitions. [2022-12-14 10:08:38,776 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 28418 transitions. Word has length 77 [2022-12-14 10:08:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:38,776 INFO L495 AbstractCegarLoop]: Abstraction has 19737 states and 28418 transitions. [2022-12-14 10:08:38,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 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) [2022-12-14 10:08:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 28418 transitions. [2022-12-14 10:08:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 10:08:38,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:38,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:38,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-14 10:08:38,778 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:38,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1315945786, now seen corresponding path program 1 times [2022-12-14 10:08:38,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:38,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843672202] [2022-12-14 10:08:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:38,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:08:38,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843672202] [2022-12-14 10:08:38,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843672202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:08:38,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:08:38,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:08:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309709520] [2022-12-14 10:08:38,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:38,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:08:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:38,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:08:38,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:08:38,856 INFO L87 Difference]: Start difference. First operand 19737 states and 28418 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-12-14 10:08:46,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:46,533 INFO L93 Difference]: Finished difference Result 30433 states and 44195 transitions. [2022-12-14 10:08:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:08:46,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2022-12-14 10:08:46,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:46,557 INFO L225 Difference]: With dead ends: 30433 [2022-12-14 10:08:46,557 INFO L226 Difference]: Without dead ends: 23823 [2022-12-14 10:08:46,563 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 [2022-12-14 10:08:46,564 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 97 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:46,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 408 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:08:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23823 states. [2022-12-14 10:08:54,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23823 to 22765. [2022-12-14 10:08:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22765 states, 22764 states have (on average 1.4401686874011597) internal successors, (32784), 22764 states have internal predecessors, (32784), 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) [2022-12-14 10:08:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22765 states to 22765 states and 32784 transitions. [2022-12-14 10:08:54,815 INFO L78 Accepts]: Start accepts. Automaton has 22765 states and 32784 transitions. Word has length 80 [2022-12-14 10:08:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:54,816 INFO L495 AbstractCegarLoop]: Abstraction has 22765 states and 32784 transitions. [2022-12-14 10:08:54,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2022-12-14 10:08:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22765 states and 32784 transitions. [2022-12-14 10:08:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 10:08:54,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:54,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:54,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-14 10:08:54,818 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:08:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1912914459, now seen corresponding path program 1 times [2022-12-14 10:08:54,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:08:54,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710275969] [2022-12-14 10:08:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:08:54,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:08:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:08:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:54,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:08:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710275969] [2022-12-14 10:08:54,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710275969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:08:54,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:08:54,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:08:54,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326998701] [2022-12-14 10:08:54,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:08:54,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:08:54,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:08:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:08:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:08:54,884 INFO L87 Difference]: Start difference. First operand 22765 states and 32784 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-12-14 10:09:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:03,812 INFO L93 Difference]: Finished difference Result 37945 states and 55118 transitions. [2022-12-14 10:09:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:09:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 83 [2022-12-14 10:09:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:03,846 INFO L225 Difference]: With dead ends: 37945 [2022-12-14 10:09:03,846 INFO L226 Difference]: Without dead ends: 28407 [2022-12-14 10:09:03,854 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 [2022-12-14 10:09:03,854 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 92 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:03,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 390 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:09:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28407 states. [2022-12-14 10:09:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28407 to 26917. [2022-12-14 10:09:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26917 states, 26916 states have (on average 1.4398870560261554) internal successors, (38756), 26916 states have internal predecessors, (38756), 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) [2022-12-14 10:09:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26917 states to 26917 states and 38756 transitions. [2022-12-14 10:09:12,461 INFO L78 Accepts]: Start accepts. Automaton has 26917 states and 38756 transitions. Word has length 83 [2022-12-14 10:09:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:12,461 INFO L495 AbstractCegarLoop]: Abstraction has 26917 states and 38756 transitions. [2022-12-14 10:09:12,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2022-12-14 10:09:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 26917 states and 38756 transitions. [2022-12-14 10:09:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 10:09:12,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:12,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-12-14 10:09:12,463 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash -422625049, now seen corresponding path program 1 times [2022-12-14 10:09:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:12,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920214854] [2022-12-14 10:09:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:12,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:12,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920214854] [2022-12-14 10:09:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920214854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:12,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:12,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:09:12,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154425797] [2022-12-14 10:09:12,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:12,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:09:12,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:09:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:09:12,522 INFO L87 Difference]: Start difference. First operand 26917 states and 38756 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2022-12-14 10:09:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:23,219 INFO L93 Difference]: Finished difference Result 48585 states and 70488 transitions. [2022-12-14 10:09:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:09:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2022-12-14 10:09:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:23,262 INFO L225 Difference]: With dead ends: 48585 [2022-12-14 10:09:23,262 INFO L226 Difference]: Without dead ends: 35151 [2022-12-14 10:09:23,275 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 [2022-12-14 10:09:23,275 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 87 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:23,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 371 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35151 states. [2022-12-14 10:09:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35151 to 32941. [2022-12-14 10:09:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32941 states, 32940 states have (on average 1.4373406193078324) internal successors, (47346), 32940 states have internal predecessors, (47346), 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) [2022-12-14 10:09:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32941 states to 32941 states and 47346 transitions. [2022-12-14 10:09:33,542 INFO L78 Accepts]: Start accepts. Automaton has 32941 states and 47346 transitions. Word has length 86 [2022-12-14 10:09:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:33,542 INFO L495 AbstractCegarLoop]: Abstraction has 32941 states and 47346 transitions. [2022-12-14 10:09:33,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2022-12-14 10:09:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 32941 states and 47346 transitions. [2022-12-14 10:09:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 10:09:33,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:33,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:33,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-14 10:09:33,544 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:09:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash -383437107, now seen corresponding path program 1 times [2022-12-14 10:09:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:09:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259792625] [2022-12-14 10:09:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:09:33,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:09:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:09:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:33,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:09:33,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259792625] [2022-12-14 10:09:33,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259792625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:09:33,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:09:33,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:09:33,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821563454] [2022-12-14 10:09:33,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:09:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:09:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:09:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:09:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:09:33,601 INFO L87 Difference]: Start difference. First operand 32941 states and 47346 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-12-14 10:09:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:48,684 INFO L93 Difference]: Finished difference Result 66695 states and 96392 transitions. [2022-12-14 10:09:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:09:48,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 89 [2022-12-14 10:09:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:48,741 INFO L225 Difference]: With dead ends: 66695 [2022-12-14 10:09:48,741 INFO L226 Difference]: Without dead ends: 45525 [2022-12-14 10:09:48,760 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 [2022-12-14 10:09:48,761 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 82 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:48,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 352 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:09:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45525 states. [2022-12-14 10:10:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45525 to 42175. [2022-12-14 10:10:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42175 states, 42174 states have (on average 1.4317351922985726) internal successors, (60382), 42174 states have internal predecessors, (60382), 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) [2022-12-14 10:10:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42175 states to 42175 states and 60382 transitions. [2022-12-14 10:10:02,445 INFO L78 Accepts]: Start accepts. Automaton has 42175 states and 60382 transitions. Word has length 89 [2022-12-14 10:10:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:02,445 INFO L495 AbstractCegarLoop]: Abstraction has 42175 states and 60382 transitions. [2022-12-14 10:10:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2022-12-14 10:10:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 42175 states and 60382 transitions. [2022-12-14 10:10:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 10:10:02,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:02,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:02,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-14 10:10:02,448 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1707759731, now seen corresponding path program 1 times [2022-12-14 10:10:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:02,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058957100] [2022-12-14 10:10:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:02,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058957100] [2022-12-14 10:10:02,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058957100] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:02,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:02,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:10:02,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686382288] [2022-12-14 10:10:02,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:10:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:10:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:10:02,503 INFO L87 Difference]: Start difference. First operand 42175 states and 60382 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2022-12-14 10:10:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:22,495 INFO L93 Difference]: Finished difference Result 98189 states and 141008 transitions. [2022-12-14 10:10:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:10:22,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 92 [2022-12-14 10:10:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:22,639 INFO L225 Difference]: With dead ends: 98189 [2022-12-14 10:10:22,639 INFO L226 Difference]: Without dead ends: 61441 [2022-12-14 10:10:22,665 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 [2022-12-14 10:10:22,665 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 79 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:22,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 353 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:10:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61441 states. [2022-12-14 10:10:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61441 to 57449. [2022-12-14 10:10:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57449 states, 57448 states have (on average 1.4254630274335052) internal successors, (81890), 57448 states have internal predecessors, (81890), 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) [2022-12-14 10:10:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57449 states to 57449 states and 81890 transitions. [2022-12-14 10:10:41,272 INFO L78 Accepts]: Start accepts. Automaton has 57449 states and 81890 transitions. Word has length 92 [2022-12-14 10:10:41,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:41,272 INFO L495 AbstractCegarLoop]: Abstraction has 57449 states and 81890 transitions. [2022-12-14 10:10:41,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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) [2022-12-14 10:10:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 57449 states and 81890 transitions. [2022-12-14 10:10:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 10:10:41,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:41,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-12-14 10:10:41,277 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:10:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1706570246, now seen corresponding path program 1 times [2022-12-14 10:10:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:10:41,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043728316] [2022-12-14 10:10:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:10:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:10:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:10:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:41,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:10:41,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043728316] [2022-12-14 10:10:41,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043728316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:10:41,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:10:41,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:10:41,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106988438] [2022-12-14 10:10:41,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:10:41,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:10:41,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:10:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:10:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:10:41,313 INFO L87 Difference]: Start difference. First operand 57449 states and 81890 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:11:08,270 INFO L93 Difference]: Finished difference Result 108472 states and 154327 transitions. [2022-12-14 10:11:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:11:08,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-12-14 10:11:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:11:08,382 INFO L225 Difference]: With dead ends: 108472 [2022-12-14 10:11:08,383 INFO L226 Difference]: Without dead ends: 78904 [2022-12-14 10:11:08,408 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 [2022-12-14 10:11:08,408 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 80 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:11:08,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 376 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:11:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78904 states. [2022-12-14 10:11:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78904 to 78902. [2022-12-14 10:11:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78902 states, 78901 states have (on average 1.4149123585252406) internal successors, (111638), 78901 states have internal predecessors, (111638), 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) [2022-12-14 10:11:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78902 states to 78902 states and 111638 transitions. [2022-12-14 10:11:35,676 INFO L78 Accepts]: Start accepts. Automaton has 78902 states and 111638 transitions. Word has length 99 [2022-12-14 10:11:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:11:35,677 INFO L495 AbstractCegarLoop]: Abstraction has 78902 states and 111638 transitions. [2022-12-14 10:11:35,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 78902 states and 111638 transitions. [2022-12-14 10:11:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 10:11:35,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:11:35,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:11:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-14 10:11:35,683 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:11:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:11:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2002293318, now seen corresponding path program 1 times [2022-12-14 10:11:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:11:35,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505787027] [2022-12-14 10:11:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:11:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:11:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:11:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:35,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:11:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505787027] [2022-12-14 10:11:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505787027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:11:35,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:11:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:11:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438281525] [2022-12-14 10:11:35,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:11:35,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:11:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:11:35,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:11:35,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:11:35,722 INFO L87 Difference]: Start difference. First operand 78902 states and 111638 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:12:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:26,767 INFO L93 Difference]: Finished difference Result 205039 states and 289910 transitions. [2022-12-14 10:12:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:12:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-12-14 10:12:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:26,989 INFO L225 Difference]: With dead ends: 205039 [2022-12-14 10:12:26,989 INFO L226 Difference]: Without dead ends: 132204 [2022-12-14 10:12:27,052 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 [2022-12-14 10:12:27,052 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 97 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:27,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 452 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:12:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132204 states. [2022-12-14 10:13:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132204 to 132202. [2022-12-14 10:13:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132202 states, 132201 states have (on average 1.4025990726242616) internal successors, (185425), 132201 states have internal predecessors, (185425), 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) [2022-12-14 10:13:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132202 states to 132202 states and 185425 transitions. [2022-12-14 10:13:15,595 INFO L78 Accepts]: Start accepts. Automaton has 132202 states and 185425 transitions. Word has length 99 [2022-12-14 10:13:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:13:15,596 INFO L495 AbstractCegarLoop]: Abstraction has 132202 states and 185425 transitions. [2022-12-14 10:13:15,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:13:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 132202 states and 185425 transitions. [2022-12-14 10:13:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 10:13:15,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:13:15,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:13:15,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-14 10:13:15,604 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:13:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:13:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash -869504561, now seen corresponding path program 1 times [2022-12-14 10:13:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:13:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121490333] [2022-12-14 10:13:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:13:15,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:13:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:13:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:13:15,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:13:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121490333] [2022-12-14 10:13:15,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121490333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:13:15,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:13:15,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:13:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773840426] [2022-12-14 10:13:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:13:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:13:15,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:13:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:13:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:13:15,654 INFO L87 Difference]: Start difference. First operand 132202 states and 185425 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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)